Difference between revisions of "Solar Battery Charging Stations"

From energypedia
***** (***** | *****)
m
***** (***** | *****)
m
 
(147 intermediate revisions by 15 users not shown)
Line 1: Line 1:
Please download the [http://www.endev.info/index.php?option=com_docman&task=doc_download&gid=531 paper on rural electrification by battery charging stations] as PDF. The information on this wiki page will be completed soon.
+
[[Portal:Solar|►Back to Solar Portal]]
 +
= Overview<br/> =
  
<br> [[Image:Battery Terminal.jpg|center|An operator of a solar battery charging station in Mali connects a battery to the charging terminal]]  
+
In rural areas of developing countries many households do not have access to electricity and power their radios with dry cell [[Batteries|batteries]] or use candles and kerosene lamps for domestic [[Lighting|lighting]]. Some employ car batteries that are charged in stations for lighting and entertainment.
  
<br>  
+
<br/>
  
= Rural Electrification by Battery Charging Stations  =
+
<br/>
  
In rural areas of developing countries many households do not have access to electricity and power their radios with dry cell batteries or use candles and kerosene lamps for domestic lighting. Some employ car batteries that are charged in battery charging stations for lighting and entertainment.
 
  
Battery charging stations are usually not the first choice for rural electrification, but they can be viable in remote areas were no other alternatives exist and the income of the population is too low to invest in other solutions as for example solar home systems. Battery charging stations provide services for a low energy demand and therefore, are a temporary solution until other energy resources are available. Until then, however, many years may pass.
+
= Rural Electrification by Battery Charging Stations<br/> =
  
In electrified areas grid-based battery charging stations can be seen as indirect grid densification as those that have no direct connection in their home profit indirectly from the existing electricity infrastructure.  
+
'''[[File:Battery Terminal.jpg|frame|right|276px|Battery Terminal.jpg]]'''[[:Category:Battery Charging Systems|Battery charging stations (BCSs)]] can be a viable option to provide electricity in un-electrified areas and where incomes are insufficient to pay for solutions like '''[[Solar Home Systems (SHS)|solar home systems (SHS)]]'''.<br/>
  
Lead-acid wet cell car batteries are often used for providing a minimum of electricity services for the local population in many developing countries. They are usually available on the market, in some countries also produced locally and the most common type in use to cover basic energy needs. They are the least cost option, but have a low allowable depth of discharge and a short life time compared to deep-cycle batteries designed to provide a steady amount of current over a long period.
+
<br/>
  
The use of electricity from car batteries can improve the living conditions of its users to a large extent. Battery powered lamps not only improve domestic working conditions at night in particular for women but also enhance studying conditions for children because they provide brighter light than kerosene lamps and candles. Furthermore, they do not emit noxious pollutants accounting for a healthier indoor air.  
+
In electrified areas grid-based BCSs moreover can <span>serve to extend access to electricity to those who </span>have no direct connection in their home, thus profiting indirectly from the electricity infrastructure.
  
Battery-driven radios and TVs are highly valued for information and entertainment. Small radios are often powered by expensive dry cell batteries which are thrown into the nature after being used. Power from batteries charged in a battery charging station is an environment-friendlier option if their disposal and recycling, after a lifetime of up to three years, is guaranteed.
+
<br/>
  
The possibility to recharge mobile phones is crucial for the access to modern communication and can help people in rural areas to obtain information and facilitate commercial operations.  
+
Charged (car) batteries in fact can provide services comparable to the upper end of the pico PV range at lower investment costs, though running costs eventually are higher.
  
To a smaller extent, the provision of battery charging facilities gradually contributes to raising incomes derived from small businesses and handicraft, especially in communal market towns. Shop owners, for example, can open their shops in the evenings, and thus not only might raise their income, but also deliver an improved service to the community. Usually car batteries are transported to the nearest grid, diesel or solar-based battery charging station where they are connected and recharged for a fee. In addition to the fee, users pay transport costs according to the distance to the next station. Depending on the household’s income, energy demand, battery quality and size, batteries are recharged between two to four times a month.
+
<br/>
  
Diesel generators can charge a limited number of batteries at a time, and service costs highly depend on diesel costs. Grid based charging stations are usually less subject to quantity restrictions and changing diesel prices, but might be located far from the rural population.  
+
A little electricity, like from car batteries, can considerably improve living conditions of its users. Electrically powered lamps improve domestic working conditions at night in particular for women and can also enhance studying conditions for children, not only because of the better light but also since they reduce fire hazard and do not emit noxious pollutants. Other services that are highly valued and only require a little electricity as can e.g. be delivered by car batteries are radio and tv for information and entertainment, and air circulation (fans) for basic cooling. Also mobile phones, crucial for access to modern communication, helping people in rural areas to obtain information and thus e.g. facilitating commercial operations, can easily be charged off car-batteries, though they can also be charged directly at a BCS. In order to provide such services a car battery should be recharged a few times a month.
  
Solar battery charging stations (SBCS) constructed in rural areas are an alternative solution to provide the local population with energy for basic needs and reduce the time and expenses required for travelling.
+
<br/>
  
Those stations consist of  
+
To a small extent, electricity from charged (car) batteries can also contribute to raising incomes of small businesses and handicraft, especially in communal market towns. Shop owners, for example, can open their shops in the evenings thus not only raising their income, but also delivering an improved service to the community.
  
*at least one photovoltaic panel and  
+
<br/>
 +
 
 +
In such schemes mostly lead-acid wet cell car-, truck- and / or motorcycle batteries are used as they are most easily available on the market, either new or second hand, and as they are produced locally in some countries. While thus often the least cost option, this type of (starter) batteries cannot really stand deep discharging as normally done when used for such services, implying their capacity is decreasing over time and their effective lifespan is limited. Proper deep-cycle batteries have much better performance in such set-ups but often are hard to find and cost a lot more.
 +
 
 +
<br/>
 +
 
 +
Electricity from rechargeable batteries can provide a lot more service at far lower costs than disposable dry cell batteries. They are also the environmentally friendlier option provided their eventual disposal / recycling, is properly organised, which in itself is worth doing.
 +
 
 +
The batteries are transported to the nearest grid, diesel or solar-based battery charging station where they are recharged for a fee. In addition to that fee, running cost of the system may thus include the transport costs to and from the BCS. Diesel generators can charge a limited number of batteries at a time, and service costs highly depend on diesel costs. Grid based charging stations are usually less subject to quantity restrictions and changing diesel prices, but might be located far from the rural population. '''[[:Category:Battery Charging Systems|Solar battery charging stations (SBCS)]] '''constructed in rural areas are an alternative solution to provide the local population with energy for basic needs and reduce the time and expenses required for travelling.<br/>
 +
 
 +
<br/>
 +
 
 +
<u>Those stations consist of:</u>
 +
 
 +
*one or more photovoltaic panels and
 
*a charge controller to prevent batteries from overcharging.
 
*a charge controller to prevent batteries from overcharging.
  
The size of a SBCS and the number of PV panels installed vary according to insolation (solar radiation energy received on a given surface area at a given time) and energy demand (number of batteries to be charged). SBCS can be operated in different ways.
+
The [[Sizing a Battery Charging Systems (BCS)|size of a SBCS]] and the number of [[Photovoltaic (PV)|Photovoltaic (PV) panels]] installed vary according to the anticipated energy demand and to the (average) insolation - the solar energy per unit area , which varies with latitude and (average) whether conditions<br/>
  
They can be
+
<br/>
  
*property of the municipality  
+
<u>The most common modes of operation of SBCS's are</u>.
 +
 
 +
*property of the municipality
 
*privately owned.
 
*privately owned.
  
The users may pay  
+
<u>The users may pay:</u>
  
*a fee per charge  
+
*a fee per charge
*a monthly fee  
+
*a monthly fee
*for the recharge of their own batteries or
 
 
*for renting a recharged battery owned by the operator.
 
*for renting a recharged battery owned by the operator.
  
SBCS can simply offer recharge service or include a shop selling other solar and electric equipment.  
+
In addition to battery charging (S)BCSs may include additional services like a shop selling solar and electric equipment.
  
<br>  
+
= '''<br/>''' =
  
= Example ‘Energising Development’ Mali  =
 
  
Mali's power grid covers only a few urban areas and more than 97&nbsp;% of the rural population live without access to electricity. In order to enhance living conditions of the population photovoltaic battery charging stations were installed in seven rural municipalities as a part of the Malian Communal Electrification Programme ‘Électrifcation Communale’ (ELCOM) which is a unit of the Local Government Support Programme (‘Programme d’Appui aux Collectivités Territoriales’ (PACT)) and forms an integral part of the ‘Energising Development’ (EnDev) initiative, a German-Dutch partnership.
+
= '''Transformation into energy kiosks'''<br/> =
ELCOM’s objective is to provide access to electricity in rural areas of Mali, not only by constructing SBCS for local people, but also by installing communal solar power systems for key public buildings (health centres, schools, town halls) and solar street lights.
 
  
The SBCS are property of the municipality and the operation is delegated to a private service provider who runs them on a fee-for-service basis. The fee is used to cover the maintenance and upgrade costs of the SBSC as well as the maintenance costs for the communal PV systems installed in schools, health centres and town halls.  
+
Since 2013, the demand for charging batteries went down in Mali. Reason for which EnDev decided to transform the stations, making optimal use from the electricity produced while delivering additional services. After consulting the community, fridges have been put in place (166L). At that point, revenues were as low as €4 a month for the technicians of the station. The succesfull exploitation of the fridges increased revenues over the first year importantly. The technician's salery went up to € 78, while overall revenues reached about 550% of those obtained with battery charging only (from 2015 untill half 2016).<br/>
  
From the beginning of 2008 until the beginning of 2009, 26 SBCS were constructed. The municipalities contributed to the expenses in cash and in kind (labour by the villagers) with an average proportion of 10 to 20&nbsp;% of the initial investment costs. The remaining costs were covered by EnDev funding.  
+
The new 'energy kiosks' are also used to establish a network for quality PV equipment, especially pico PV.<br/>
  
Most of the SBCS constructed have a recharge capacity of three batteries per day.
+
<br/>
  
They consist of
 
  
*a building with recharge terminal,
+
= Example "Energising Development" Mali =
*six PV panels with a capacity of 65 Wp each,
 
*a charge controller and
 
*necessary equipment such as cables and fittings.
 
  
Some SBCS have a capacity of six batteries per day (capacity of 780 Wp (= 12 panels), two charge controllers) and one has a capacity of nine batteries. Furthermore, each SBCS has its own small PV system for lighting consisting of a 65 Wp panel, a charge controller, a battery and lamps for inside and outside.  
+
Mali's power grid covers only a few urban areas; over 95&nbsp;% of the rural population has no access to electricity from a grid. In order to enhance living conditions of the rural population, in total 50 SBSBs were installed in 17 rural municipalities as a part of the Communal Electrification Programme '''‘Électrifcation Communale’ (ELCOM) '''which is an element of the Local Government Support Programme (‘Programme d’Appui aux Collectivités Territoriales’ (PACT)) and forms an integral part of [[Energising Development (EnDev)|‘Energising Development’ (EnDev)]], a German-Dutch partnership.
  
<br>  
+
<br/>
  
== ELCOM Intervention Area: Regions of Ségou and Koulikoro  ==
+
ELCOM’s objective is to provide access to electricity in rural areas of Mali, not only by constructing SBCSs for local people, but also by installing solar powered systems for street lighting and in key public buildings like health centres, schools and town halls
  
<br>
+
The SBCS are property of the municipality; operation is delegated to a private service provider who runs them on a fee-for-service basis. The collective fees should suffice to cover maintenance costs for the SBSC and the communal PV systems as well as the eventual replacement of system components (batteries, charge controllers, bulbs etc).
  
=== Overview: Municipalities with SBCS Installed within the Programme  ===
+
From 2008 - 2011, 50 SBCS were constructed. The municipalities contributed to the expenses in cash and in kind (labour by the villagers) with an average proportion of 10 to 20&nbsp;% of the initial investment costs. The remaining costs were covered by EnDev funding.<br/>
  
{| width="594" cellspacing="0" cellpadding="0" border="1"
+
<br/>
 +
 
 +
<u>Most of the SBCS constructed have a charging capacity of four (70 Ah) batteries per day and consist of:</u><br/>
 +
 
 +
*a building with recharge terminal;
 +
*six 65 Wp PV panels&nbsp;;
 +
*a charge controller;
 +
*equipment such as cables and fittings
 +
 
 +
Some SBCS have a double set up and can thus charge eight 70 Ah batteries per day; one has three times this set up. Between the 50 SBCSs in the programme in total 268 70 Ah batteries can be charged daily.
 +
 
 +
Furthermore, each SBCS has a separate PV system for lighting consisting of a 65 Wp panel, a charge controller, a battery and lamps for inside and outside.
 +
 
 +
<br/>
 +
 
 +
<br/>[[File:Panels.jpg|frame|center|150px|alt=Panels.jpg]]
 +
 
 +
<br/>
 +
 
 +
== ELCOM Intervention Area: Regions of Ségou and Koulikoro ==
 +
 
 +
[[File:Mali map.jpg|frame|center|150px|alt=Mali map.jpg]]
 +
 
 +
<br/>
 +
 
 +
== Overview: Municipalities with Solar Battery Charging Stations (SBCS) Installed within the Programme<br/> ==
 +
 
 +
{| align="center" cellspacing="0" cellpadding="5" border="1" style="height: 461px;  width: 100%"
 
|-
 
|-
| width="124" rowspan="2" |  
+
| rowspan="2" style="width: 124px" |  
'''Municipality'''  
+
'''Municipality'''<br/>
  
| width="94" rowspan="2" |  
+
| rowspan="2" style="width: 94px" |  
'''Population'''  
+
'''Population''' '''(Projection 2008)'''
'''(Projection 2008)'''
 
  
| width="70" rowspan="2" |  
+
| rowspan="2" style="width: 70px" |  
'''No. of'''  
+
'''No. of''' '''SBCS'''
'''SBCS'''
 
  
| width="216" colspan="3" |  
+
| colspan="3" style="width: 216px" |  
'''Capacity of SBCS batteries/day'''  
+
'''Capacity of SBCS; # of 70 Ah batteries/day'''
  
| width="89" rowspan="2" |  
+
| rowspan="2" style="width: 89px" |  
'''Total'''  
+
'''Total''' '''batteries/ day'''
'''batteries/ day'''
 
  
 
|-
 
|-
| width="76" |  
+
| style="width: 76px" |  
'''3'''  
+
'''4'''
  
| width="76" |  
+
| style="width: 76px" |  
'''6'''  
+
'''8'''
  
| width="65" |  
+
| style="width: 65px" |  
'''9'''  
+
'''12'''
  
 
|-
 
|-
| width="124" |  
+
| style="width: 124px" |  
Katiéna  
+
Katiéna
  
| width="94" |  
+
|  
 
27,405
 
27,405
  
| width="70" |  
+
| style="width: 70px" |  
6  
+
6
  
| width="76" |  
+
| style="width: 76px" |  
3  
+
3
  
| width="76" |  
+
| style="width: 76px" |  
3  
+
3
  
| width="65" |  
+
| style="width: 65px" |  
-  
+
-
  
| width="89" |  
+
| style="width: 89px" |  
27  
+
27
  
 
|-
 
|-
| width="124" |  
+
| style="width: 124px" |  
Tiélè  
+
Tiélè
  
| width="94" |  
+
|  
 
20,133
 
20,133
  
| width="70" |  
+
| style="width: 70px" |  
6  
+
6
  
| width="76" |  
+
| style="width: 76px" |  
5  
+
5
  
| width="76" |  
+
| style="width: 76px" |  
1  
+
1
  
| width="65" |  
+
| style="width: 65px" |  
-  
+
-
  
| width="89" |  
+
| style="width: 89px" |  
21  
+
21
  
 
|-
 
|-
| width="124" |  
+
| style="width: 124px" |  
Kamiandougou  
+
Kamiandougou
  
| width="94" |  
+
|  
 
15,330
 
15,330
  
| width="70" |  
+
| style="width: 70px" |  
4  
+
4
  
| width="76" |  
+
| style="width: 76px" |  
3  
+
3
  
| width="76" |  
+
| style="width: 76px" |  
1  
+
1
  
| width="65" |  
+
| style="width: 65px" |  
-  
+
-
  
| width="89" |  
+
| style="width: 89px" |  
15  
+
15
  
 
|-
 
|-
| width="124" |  
+
| style="width: 124px" |  
N'Koumandougou  
+
N'Koumandougou
  
| width="94" |  
+
| style="text-align: left;  width: 94px" |  
 
12,371
 
12,371
  
| width="70" |  
+
| style="width: 70px" |  
4  
+
4
  
| width="76" |  
+
| style="width: 76px" |  
3  
+
3
  
| width="76" |  
+
| style="width: 76px" |  
1  
+
1
  
| width="65" |  
+
| style="width: 65px" |  
-  
+
-
  
| width="89" |  
+
| style="width: 89px" |  
15  
+
15
  
 
|-
 
|-
| width="124" |  
+
| style="width: 124px" |  
Sobra  
+
Sobra
  
| width="94" |  
+
| style="width: 94px" |  
 
9,282
 
9,282
  
| width="70" |  
+
| style="width: 70px" |  
1  
+
1
  
| width="76" |  
+
| style="width: 76px" |  
-  
+
-
  
| width="76" |  
+
| style="width: 76px" |  
-  
+
-
  
| width="65" |  
+
| style="width: 65px" |  
1  
+
1
  
| width="89" |  
+
| style="width: 89px" |  
9  
+
9
  
 
|-
 
|-
| width="124" |  
+
| style="width: 124px" |  
N'Gassola  
+
N'Gassola
  
| width="94" |  
+
| style="width: 94px" |  
 
5,549
 
5,549
  
| width="70" |  
+
| style="width: 70px" |  
2  
+
2
  
| width="76" |  
+
| style="width: 76px" |  
1  
+
1
  
| width="76" |  
+
| style="width: 76px" |  
1  
+
1
  
| width="65" |  
+
| style="width: 65px" |  
-  
+
-
  
| width="89" |  
+
| style="width: 89px" |  
9  
+
9
  
 
|-
 
|-
| width="124" |  
+
| style="width: 124px" |  
Bellen  
+
Bellen
  
| width="94" |  
+
| style="width: 94px" |  
 
5,409
 
5,409
  
| width="70" |  
+
| style="width: 70px" |  
3  
+
3
  
| width="76" |  
+
| style="width: 76px" |  
3  
+
3
  
| width="76" |  
+
| style="width: 76px" |  
-  
+
-
  
| width="65" |  
+
| style="width: 65px" |  
-  
+
-
  
| width="89" |  
+
| style="width: 89px" |  
9  
+
9
  
 
|-
 
|-
| width="124" |  
+
| style="width: 124px" |  
'''Total'''  
+
'''Total'''
  
| width="94" |  
+
| style="width: 94px" |  
'''95,479'''  
+
'''95,479'''
  
| width="70" |  
+
| style="width: 70px" |  
'''26'''  
+
'''26'''
  
| width="76" |  
+
| style="width: 76px" |  
'''18'''  
+
'''18'''
  
| width="76" |  
+
| style="width: 76px" |  
'''7'''  
+
'''7'''
  
| width="65" |  
+
| style="width: 65px" |  
'''1'''  
+
'''1'''
  
| width="89" |  
+
| style="width: 89px" |  
'''105'''  
+
'''105'''
  
 
|}
 
|}
  
== Costs, Revenues and Operational Model ==
+
<br/>
 +
 
 +
== Costs, Revenues and Operational Model ==
 +
 
 +
=== Investment Costs ===
 +
 
 +
A SBCS with a four-battery charging capacity costs approximately € 8.000, including the costs for the construction of the building; for the bigger SBCSs costs are roughly proportionally higher.
 +
 
 +
<br/>
 +
 
 +
=== The Customers ===
 +
 
 +
The user should have a battery that can be recharged in a SBCS. Batteries are costly in relation to the income of the rural population - that mostly live below the 1$/day threshold: new 70 Ah batteries cost about 40,000 FCFA (€ 61), second hand batteries cost 10 - 15,000 FCFA (€ 15 to 23). Smaller (motorcycle)batteries can also be used, costing quite a bit less while obviously also bigger (truck) batteries can be charged at the SBCS.
 +
 
 +
<br/>
 +
 
 +
The charge of a 70 Ah battery in Bamako or in regional and district centres costs roughly FCFA 500 (€ 0.8). Additional transport costs (for distances sometimes up to 100 km) can lead to a total expense of FCFA 1,000 per charge.
 +
 
 +
In order to ensure sustainable operation of the SBCS the charging cost for a 70 Ah battery was calculated at 750 FCFA which is considered a competitive price compared to pre-existing conditions (long journeys, travel costs, recharge quality).
 +
 
 +
Battery charging, be it in a conventional charging station or in a SBCS, however is expensive, both in comparison to the price of grid electricity as well as related to the target population's income.<br/>
 +
 
 +
<br/>
 +
 
 +
=== The Operator ===
 +
 
 +
The private operator is responsible for the running of the SBCS and for maintenance and repair of all solar powered systems (SBCS, SI and Street lighting alike) installed through the programme. Income from the SBCS is divided in a pre-defined way between daily running costs, income of the technicians, a fee for the operator, a contribution to teh municipality budget, a fee for the management committee and a contribution to the amortisation fund - from which replacements should eventually be paid.
 +
 
 +
<br/>
 +
 
 +
The management committee, established in each municipality, is responsible for supervising the operation. It consists of village representatives and is responsible for the operator renting fee, for repair of equipment and for investments. The operator participates in their meetings regularly so as to ensure a mutual control of actors involved.
 +
 
 +
From the operator’s fee repairs of all solar installations in a municipality should be paid, including spare parts if necessary and potential upgrade costs. The remaining amount is the operator's profit.
 +
 
 +
In order to be profitable the SBCS have to run at 70 - over 90&nbsp;% of their maximal capacity in the case of rural Mali.
 +
 
 +
<br/>
 +
 
 +
== Experiences<br/> ==
 +
 
 +
In general, the SBCS are operating reliably; good quality components were used and . They are known and reputed among the clients for their high quality of charge, which allows battery utilisation for about two weeks (15 to 20 days, depending on the quality of the battery). The quality of charge of other BCS is usually much lower (utilisation of 2 to 5 days) as they do not apply charge controllers. Nevertheless, the advantages and potential savings on energy expenditures have to be explained to the costumers, who often only see the higher price, not considering the superior price-service ratio and the amount of money saved on transport costs. Word of mouth seems to be the most effective means of marketing.
 +
 
 +
<br/>
  
=== Investment Costs  ===
+
With all the SBCS running approximately 1,100 batteries are charged per month. As a result 6,470 people currently profit from the SBSC and have access to electricity. However, the number and the capacity of the SBCS in some of the municipalities were over-estimated as the number of costumers’ remains low and the SBSC are running on approximately 35 to 40&nbsp;% of their capacity on average. This is partly due to the lack of rechargeable batteries. Most of the batteries brought to the SBCS are car batteries that are not suited for delivering a steady amount of current over a longer time but the only ones which are readily available in rural areas. Many households cannot even afford to buy a car battery and others have second hand batteries which are in such a poor condition that recharging them is impossible. Many potential customers had to be rejected by the operator due to the bad state of their battery. However, even those who do not own a battery profit indirectly from charging services as they can watch TV in their neighbours’ home or have their mobile phone recharged by someone owning a battery.<br/>
  
A SBCS which has a charging capacity of three batteries (six 65 Wp PV panels, one charge controller) costs approximately FCFA 5.2 million (~ € 7.900), including the costs for the construction of the building. The costs for SBCS with a capacity of six batteries or more are higher according to the prices for PV panels and charge controllers.
+
<br/>
  
<br>
+
The maintenance of all solar installations including communal PV systems and an acceptable level of profit for the operator is not guaranteed if the degree of capacity utilisation does not reach 60 to 70&nbsp;%. Currently, only in one municipality is the revenue high enough for the operator to pay the total fee. In the other municipalities the operators meet on a monthly basis with the management committee and representatives from the town hall to discuss the repartition of the revenue. In this way it is avoided that the operator is discouraged.
  
=== The Customers  ===
+
<br/>
  
Firstly, the user has to possess a battery that can be recharged in a SBCS. As batteries are very expensive in proportion to the income of the rural population, many people cannot afford them. Hence, they are excluded from the services SBCS offer. New batteries with a capacity of 70 Ah (typical car batteries) cost about 40,000 FCFA (€ 61). Second hand batteries cost between 10,000 and 15,000 FCFA (€ 15 to 23).  
+
Almost all municipalities have had large difficulties in mobilising their share. This led to major delays in the construction of the SBCS as the communal contribution had to be paid directly to the construction companies. The municipalities, who were also the contracting authority, were unwilling to put the construction companies under pressure to terminate the construction as they were depending on the goodwill of the contracted companies to pre-finance the communal share. These dependencies sometimes resulted in less transparent awarding of contracts to construction enterprises. In addition, the inhabitants of the municipalities could not be easily mobilised to contribute their manual support for construction.
  
The charge of a 70 Ah battery in Bamako or in regional and district centres costs FCFA 500 (€ 0.8). Additional transport costs to overcome distances of up to 100 km can lead to a total expense of FCFA 1,000.
+
<br/>
  
FCFA 750 per charge in communal SBCS are considered to be a competitive price compared to pre-existing conditions (long journeys, travel costs, recharge quality).  
+
A positive development of the programme is that the private operators have begun to install solar home systems, sell solar lanterns and provide after-sales services in the rural municipalities that go beyond the original ELCOM intervention.
  
Compared to the low income of the rural population, battery charging be it in a conventional charging station or in a SBCS, is very expensive. ELCOM team members estimate that a person in a rural area can earn between FCFA 5,000 and 6,000 (€ 8 to 9). This means that recharging a battery twice a month accounts for a proportion of more than 25&nbsp;% of a monthly income.
+
<br/>
  
<br>  
+
== Lessons Learnt<br/> ==
  
=== The Operator  ===
+
The in kind contribution by the village community will be not included any more and more emphasis will be placed on a direct financial contribution. <span lang="en-gb"><font face="arial">It was difficult to mobilise the whole community to perform their allocated tasks and resulted in an unfair distribution of work among the inhabitants.</font></span>
  
The private operator who takes care of the charging stations in each municipality has to pay a fixed monthly fee, which is divided between the amortisation fund, the town hall and the management committee. The management committee, established in each municipality, is responsible for supervising the operation of the solar installations. It consists of village representatives as well as the operator and is responsible for the operator renting fee, for repair of equipment and for investments. In this way mutual control of the involved actors is guaranteed. The operator’s fee is used to pay necessary repairs of all the installations including those generating power for key public buildings and the street lights. Spare parts if necessary and potential upgrade costs have to be covered by the revenue from the SBSC as well.  
+
Monthly monitoring of SBCS management during the first months of operation is absolutely necessary. The technicians as well as the operators need support to use the provided management tools.
  
Furthermore, the operator has to pay the wages of the technicians. His profit has to be covered by the remaining amount. In order to be profitable the SBCS have to run on 60 to 70&nbsp;% of the total capacity in the case of rural Mali.  
+
Technical monitoring has to be done about every two months during the first six months to demonstrate presence and prevent misuse of the equipment installed. It also helps in capacity building regarding end-users, operators and technicians. For technical monitoring it will be necessary to develop a maintenance plan that operators can follow when they visit the installations.
  
<br>
+
In order to avoid over-capacity and reduce costs for both, the project and the municipalities, the number of SBCS, their capacity and the selection of the villages where they will be located, will be based on the result of detailed feasibility studies which will take place in the intervention area in the future. In order to ensure business profitability, wealthier municipalities should be selected where people have the means to buy quality batteries and charge them on a regular basis. Small commercial centres where electricity is required for productive use, are also better suited. Other factors such as network coverage for mobile phones and TV signal coverage have also to be taken into consideration. This experience shows the difficulty in providing electricity to the poorest and the necessity of having customers which have a certain level of income to assure the sustainability of the intervention.
  
== Experiences  ==
+
<br/>
  
After their installation, the SBCS are operating reliably. They are known and reputed among the clients for their very high quality of charge, which allows battery utilisation for about two weeks (15 to 20 days, depending on the quality of the battery). The quality of charge of other BCS is usually much lower (utilisation of 2 to 5 days) as they do not apply charge controllers. Nevertheless, the advantages and potential savings on energy expenditures have to be explained to the costumers, who often only see the higher price, not considering the superior price-service ratio and the amount of money saved on transport costs. Word of mouth seems to be the most effective means of marketing.
+
= Example [[Cambodia Energy Situation|Cambodia]]<br/> =
  
With all the SBCS running approximately 1,100 batteries are charged per month. As a result 6,470 people currently profit from the SBSC and have access to electricity. However, the number and the capacity of the SBCS in some of the municipalities were over-estimated as the number of costumers’ remains low and the SBSC are running on approximately 35 to 40&nbsp;% of their capacity on average. This is partly due to the lack of rechargeable batteries. Most of the batteries brought to the SBCS are car batteries that are actually not suited for delivering a steady amount of current over a longer time. Solar batteries designed for that purpose cost even more than car batteries and are not readily available in rural areas. Many households cannot even afford to buy a car battery and others have second hand batteries which are in such a poor condition that recharging them is impossible. Many potential customers had to be rejected by the operator due to the bad state of their battery. However, even those who do not own a battery profit indirectly from charging services as they can watch TV in their neighbours’ home or have their mobile phone recharged by someone owning a battery. The maintenance of all solar installations including communal PV systems and an acceptable level of profit for the operator is not guaranteed if the degree of capacity utilisation does not reach 60 to 70&nbsp;%. Currently, only in one municipality is the revenue high enough for the operator to pay the total fee. In the other municipalities the operators meet on a monthly basis with the management committee and representatives from the town hall to discuss the repartition of the revenue. In this way it is avoided that the operator is discouraged.
+
<u>A handful of solar battery stations (or rather solar assisted or with diesel generators as back up) are in place in Cambodia:</u>
  
Almost all municipalities have had large difficulties in mobilising their share. This led to major delays in the construction of the SBCS as the communal contribution had to be paid directly to the construction companies. The municipalities, who were also the contracting authority, were unwilling to put the construction companies under pressure to terminate the construction as they were depending on the goodwill of the contracted companies to pre-finance the communal share. These dependencies sometimes resulted in less transparent awarding of contracts to construction enterprises. In addition, the inhabitants of the municipalities could not be easily mobilised to contribute their manual support for construction.  
+
*[http://www.kamworks.com/ Kamworks] piloted a SBC station at an already existing battery charging station, yet stopped after half a year as the operator was not satisfied- the timing was not ideal as the project started in the rainy season, when solar irradiation is not sufficient.Also, the donated solar panels did not reach electricity generation expectations.
 +
*4 SBCS have been 100% funded through the [http://sgp.undp.org/web/projects/12855/solar_battery_charging_project.html GEF Small Grants Programme under UNDP.]they are community owned. Charging rates are lower than at diesel operated charging services.part of the income is saved within the community for later maintenance and repair, yet the amount is very low. The remaining money is used to pay the operator.
 +
*[http://www.locab.org/ LOCAB] has been partner of the GEF Small Grants programme and has also installed privately owned and funded solar battery charging stations in very remote regions, e.g. Mondulkiri (Gold Mine villages in the mountains).
 +
*GIZ also cooperated with LOCAB in a iPPP solar battery station with a private investor in Kampong Chnang province. 2.88 kWp of solar panels were installed to charge around 45 batteries (around 50 Ah). GIZ provided an improved charge controller, testing equipment, training for the operator and customers as well as marketing support and support in accessing a loan. Yet, the cost of taking out money has been so high that the operator could not repay his loan with his income from solar battery charging.
  
A positive development of the programme is that the private operators have begun to install solar home systems, sell solar lanterns and provide after-sales services in the rural municipalities that go beyond the original ELCOM intervention.
+
== <br/>Experiences from Cambodian Solar Battery Charging Stations (SBCS)<br/> ==
  
<br>  
+
*The initiative capital investment is an obstacle that needs to be overcome
 +
*Owners of existing battery charging stations are reluctant to invest, due to huge capital investment compared to diesel battery charging station, yet solar could be competitive due to very high diesel prices in Cambodia (|> 1.25 USD7l)
 +
*Sun shine time (weather) is not constant, changes from day to day, especially in rainy season but even in dry season. Hence, some diesel is needed nearly every day.
 +
*Information on the possibilities and functioning of solar energy is not widely spread, awareness needs to be created
 +
*The business model and technology is new which needs to be explained to customers in order to overcome obstacles
 +
*Customers are used to batteries being hot when they collect them from diesel run battery charging stations as these tend to overcharge the batteries. When batteries are charged properly at a solar station, they are not as hot which is why customers are of the opinion that they have not been charged. In Many cases customers complained that batteries became empty more quickly when charged with solar. The charging quality, according to them, was not satisfactory.
 +
*A lot of awareness raising and training is needed.
 +
*Very old car batteries are used. It is very difficult to change (de-)charging habits and educate customers about the advantages and importance of solar charging and the proper usage of batteries.
 +
*There are allegedly more than 10,000 charging stations in Cambodia. Due to the poor charging technologies and low level of know-how of operators, focus should be put on capacity building with regards to technical aspects of charging, including safety and efficiency issues. With little effort, a lot of energy can be saved. At the moment, due to the high price of diesel, many diesel charging stations are not profitable as operators do not calculate all of their costs when pricing their services. Diesel charging is often a side business of rural business men.
 +
*Even in areas where the grid is reaching, battery charging stations are common as they supply the poorest households who cannot afford grid connection. Also, batteries are used in times of pore cuts, for water pumping on the fields, etc.
 +
*As the price for a kwH from a battery charged with diesel is the most expensive form of energy and as it is at the same time often the only source of electricity for rural households, which are among the poorest in Cambodia, new ways of providing these households with electricity need to be found.
 +
*The efficiency of using solar energy to old car batteries is very low, especially keeping in mind the current level of know how with operators. If donors support rural electrification, battery charging is only a short time bridging technology which serves the lowest needs. Investing in solar home systems or rural mini grids (running on biomass, solar, or hybrid systems) will be a more sustainable investment with greater quality energy services.
  
== Lessons Learnt  ==
+
<br/>
  
In order to avoid delays in the construction for the future, greater efforts will be made in the selection of the municipalities involving the prefectures, sub-prefectures and the tax inspectors which should facilitate the identification of municipalities which are able to pay their own contribution. The municipalities will outsource the responsibility for supervising the construction process to ELCOM, thus avoiding problems with the construction companies from the beginning. Furthermore, the in kind contribution by the village community will be not included any more and more emphasis will be placed on a direct financial contribution.
+
= Key Success Factors for Solar Battery Charging Stations (SBCS)<br/> =
  
Monthly monitoring of SBCS management during the first months of operation is absolutely necessary. The technicians as well as the operators need support to use the provided management tools.
+
<u>In general SBCS are comparably expensive, but can be an economic solution</u>:
  
Technical monitoring has to be done about every two months during the first six months to demonstrate presence and prevent misuse of the equipment installed. It also helps in capacity building regarding end-users, operators and technicians. For technical monitoring it will be necessary to develop a maintenance plan that operators can follow when they visit the installations.
+
*Remote areas, which are not connected to the grid
 +
*Where there is cell phone network
 +
*Where diesel fuel costs and battery transport costs are high
 +
*Income and energy demand are low
  
In order to avoid over-capacity and reduce costs for both, the project and the municipalities, the number of SBCS, their capacity and the selection of the villages where they will be located, will be based on the result of detailed feasibility studies which will take place in the intervention area in the future. In order to ensure business profitability, wealthier municipalities should be selected where people have the means to buy quality batteries and charge them on a regular basis. Small commercial centres were electricity is required for productive use, are also better suited. Other factors such as network coverage for mobile phones and TV signal coverage have also to be taken into consideration. This experience shows the difficulty in providing electricity to the poorest and the necessity of having customers which have a certain level of income to assure the sustainability of the intervention.
+
<br/>
  
<br>
+
<u>Important aspects to be considered for the success of SBCS are</u>:
  
= Key Success Factors for SBCS  =
+
*Extensive [[Solar - Marketing|marketing]]
 +
*Additional services to be offered such as renting/selling batteries or recharge services for mobile phones or shaving heads
 +
*Training of all local operators and technicians
  
In general SBCS are comparably expensive, but can be an economic solution
+
<br/>
  
*in remote areas, which are not connected to the grid,
+
<br/>
*where diesel fuel costs and battery transport costs are high and
 
*income and
 
*energy demand are low.
 
  
Important aspects to be considered for the success of SBCS are
+
= Further Information<br/> =
  
*extensive marketing,
+
*You can also download the [[:File:Rural electrification by battery charging stations.pdf|Rural electrification by battery charging stations]] as PDF
*additional services to be offered such as renting/selling batteries or recharge services for mobile phones,
+
*[[Hydro Battery Charging Station|Hydro Battery Charging Systems]]
*training of all local operators and technicians.
+
*[[:Category:Battery Charging Systems|Battery Charging Systems]]<br/>
 +
*[[Portal:Solar|Solar Portal on energypedia]]
  
<br>
+
<br/>
  
<br>
+
= References =
  
[[Solar|⇒ Back to Solar Section]]
+
<references />
  
 +
[[Category:Battery_Charging_Systems]]
 +
[[Category:Batteries]]
 +
[[Category:Cambodia]]
 +
[[Category:Ethiopia]]
 +
[[Category:Mali]]
 +
[[Category:Mozambique]]
 +
[[Category:Lessons_Learned]]
 +
[[Category:Case_Study]]
 
[[Category:Solar]]
 
[[Category:Solar]]

Latest revision as of 09:56, 1 August 2018

►Back to Solar Portal

Overview

In rural areas of developing countries many households do not have access to electricity and power their radios with dry cell batteries or use candles and kerosene lamps for domestic lighting. Some employ car batteries that are charged in stations for lighting and entertainment.




Rural Electrification by Battery Charging Stations

Battery Terminal.jpg

Battery charging stations (BCSs) can be a viable option to provide electricity in un-electrified areas and where incomes are insufficient to pay for solutions like solar home systems (SHS).


In electrified areas grid-based BCSs moreover can serve to extend access to electricity to those who have no direct connection in their home, thus profiting indirectly from the electricity infrastructure.


Charged (car) batteries in fact can provide services comparable to the upper end of the pico PV range at lower investment costs, though running costs eventually are higher.


A little electricity, like from car batteries, can considerably improve living conditions of its users. Electrically powered lamps improve domestic working conditions at night in particular for women and can also enhance studying conditions for children, not only because of the better light but also since they reduce fire hazard and do not emit noxious pollutants. Other services that are highly valued and only require a little electricity as can e.g. be delivered by car batteries are radio and tv for information and entertainment, and air circulation (fans) for basic cooling. Also mobile phones, crucial for access to modern communication, helping people in rural areas to obtain information and thus e.g. facilitating commercial operations, can easily be charged off car-batteries, though they can also be charged directly at a BCS. In order to provide such services a car battery should be recharged a few times a month.


To a small extent, electricity from charged (car) batteries can also contribute to raising incomes of small businesses and handicraft, especially in communal market towns. Shop owners, for example, can open their shops in the evenings thus not only raising their income, but also delivering an improved service to the community.


In such schemes mostly lead-acid wet cell car-, truck- and / or motorcycle batteries are used as they are most easily available on the market, either new or second hand, and as they are produced locally in some countries. While thus often the least cost option, this type of (starter) batteries cannot really stand deep discharging as normally done when used for such services, implying their capacity is decreasing over time and their effective lifespan is limited. Proper deep-cycle batteries have much better performance in such set-ups but often are hard to find and cost a lot more.


Electricity from rechargeable batteries can provide a lot more service at far lower costs than disposable dry cell batteries. They are also the environmentally friendlier option provided their eventual disposal / recycling, is properly organised, which in itself is worth doing.

The batteries are transported to the nearest grid, diesel or solar-based battery charging station where they are recharged for a fee. In addition to that fee, running cost of the system may thus include the transport costs to and from the BCS. Diesel generators can charge a limited number of batteries at a time, and service costs highly depend on diesel costs. Grid based charging stations are usually less subject to quantity restrictions and changing diesel prices, but might be located far from the rural population. Solar battery charging stations (SBCS) constructed in rural areas are an alternative solution to provide the local population with energy for basic needs and reduce the time and expenses required for travelling.


Those stations consist of:

  • one or more photovoltaic panels and
  • a charge controller to prevent batteries from overcharging.

The size of a SBCS and the number of Photovoltaic (PV) panels installed vary according to the anticipated energy demand and to the (average) insolation - the solar energy per unit area , which varies with latitude and (average) whether conditions


The most common modes of operation of SBCS's are.

  • property of the municipality
  • privately owned.

The users may pay:

  • a fee per charge
  • a monthly fee
  • for renting a recharged battery owned by the operator.

In addition to battery charging (S)BCSs may include additional services like a shop selling solar and electric equipment.


Transformation into energy kiosks

Since 2013, the demand for charging batteries went down in Mali. Reason for which EnDev decided to transform the stations, making optimal use from the electricity produced while delivering additional services. After consulting the community, fridges have been put in place (166L). At that point, revenues were as low as €4 a month for the technicians of the station. The succesfull exploitation of the fridges increased revenues over the first year importantly. The technician's salery went up to € 78, while overall revenues reached about 550% of those obtained with battery charging only (from 2015 untill half 2016).

The new 'energy kiosks' are also used to establish a network for quality PV equipment, especially pico PV.



Example "Energising Development" Mali

Mali's power grid covers only a few urban areas; over 95 % of the rural population has no access to electricity from a grid. In order to enhance living conditions of the rural population, in total 50 SBSBs were installed in 17 rural municipalities as a part of the Communal Electrification Programme ‘Électrifcation Communale’ (ELCOM) which is an element of the Local Government Support Programme (‘Programme d’Appui aux Collectivités Territoriales’ (PACT)) and forms an integral part of ‘Energising Development’ (EnDev), a German-Dutch partnership.


ELCOM’s objective is to provide access to electricity in rural areas of Mali, not only by constructing SBCSs for local people, but also by installing solar powered systems for street lighting and in key public buildings like health centres, schools and town halls

The SBCS are property of the municipality; operation is delegated to a private service provider who runs them on a fee-for-service basis. The collective fees should suffice to cover maintenance costs for the SBSC and the communal PV systems as well as the eventual replacement of system components (batteries, charge controllers, bulbs etc).

From 2008 - 2011, 50 SBCS were constructed. The municipalities contributed to the expenses in cash and in kind (labour by the villagers) with an average proportion of 10 to 20 % of the initial investment costs. The remaining costs were covered by EnDev funding.


Most of the SBCS constructed have a charging capacity of four (70 Ah) batteries per day and consist of:

  • a building with recharge terminal;
  • six 65 Wp PV panels ;
  • a charge controller;
  • equipment such as cables and fittings

Some SBCS have a double set up and can thus charge eight 70 Ah batteries per day; one has three times this set up. Between the 50 SBCSs in the programme in total 268 70 Ah batteries can be charged daily.

Furthermore, each SBCS has a separate PV system for lighting consisting of a 65 Wp panel, a charge controller, a battery and lamps for inside and outside.



Panels.jpg


ELCOM Intervention Area: Regions of Ségou and Koulikoro

Mali map.jpg


Overview: Municipalities with Solar Battery Charging Stations (SBCS) Installed within the Programme

Municipality

Population (Projection 2008)

No. of SBCS

Capacity of SBCS; # of 70 Ah batteries/day

Total batteries/ day

4

8

12

Katiéna

27,405

6

3

3

-

27

Tiélè

20,133

6

5

1

-

21

Kamiandougou

15,330

4

3

1

-

15

N'Koumandougou

12,371

4

3

1

-

15

Sobra

9,282

1

-

-

1

9

N'Gassola

5,549

2

1

1

-

9

Bellen

5,409

3

3

-

-

9

Total

95,479

26

18

7

1

105


Costs, Revenues and Operational Model

Investment Costs

A SBCS with a four-battery charging capacity costs approximately € 8.000, including the costs for the construction of the building; for the bigger SBCSs costs are roughly proportionally higher.


The Customers

The user should have a battery that can be recharged in a SBCS. Batteries are costly in relation to the income of the rural population - that mostly live below the 1$/day threshold: new 70 Ah batteries cost about 40,000 FCFA (€ 61), second hand batteries cost 10 - 15,000 FCFA (€ 15 to 23). Smaller (motorcycle)batteries can also be used, costing quite a bit less while obviously also bigger (truck) batteries can be charged at the SBCS.


The charge of a 70 Ah battery in Bamako or in regional and district centres costs roughly FCFA 500 (€ 0.8). Additional transport costs (for distances sometimes up to 100 km) can lead to a total expense of FCFA 1,000 per charge.

In order to ensure sustainable operation of the SBCS the charging cost for a 70 Ah battery was calculated at 750 FCFA which is considered a competitive price compared to pre-existing conditions (long journeys, travel costs, recharge quality).

Battery charging, be it in a conventional charging station or in a SBCS, however is expensive, both in comparison to the price of grid electricity as well as related to the target population's income.


The Operator

The private operator is responsible for the running of the SBCS and for maintenance and repair of all solar powered systems (SBCS, SI and Street lighting alike) installed through the programme. Income from the SBCS is divided in a pre-defined way between daily running costs, income of the technicians, a fee for the operator, a contribution to teh municipality budget, a fee for the management committee and a contribution to the amortisation fund - from which replacements should eventually be paid.


The management committee, established in each municipality, is responsible for supervising the operation. It consists of village representatives and is responsible for the operator renting fee, for repair of equipment and for investments. The operator participates in their meetings regularly so as to ensure a mutual control of actors involved.

From the operator’s fee repairs of all solar installations in a municipality should be paid, including spare parts if necessary and potential upgrade costs. The remaining amount is the operator's profit.

In order to be profitable the SBCS have to run at 70 - over 90 % of their maximal capacity in the case of rural Mali.


Experiences

In general, the SBCS are operating reliably; good quality components were used and . They are known and reputed among the clients for their high quality of charge, which allows battery utilisation for about two weeks (15 to 20 days, depending on the quality of the battery). The quality of charge of other BCS is usually much lower (utilisation of 2 to 5 days) as they do not apply charge controllers. Nevertheless, the advantages and potential savings on energy expenditures have to be explained to the costumers, who often only see the higher price, not considering the superior price-service ratio and the amount of money saved on transport costs. Word of mouth seems to be the most effective means of marketing.


With all the SBCS running approximately 1,100 batteries are charged per month. As a result 6,470 people currently profit from the SBSC and have access to electricity. However, the number and the capacity of the SBCS in some of the municipalities were over-estimated as the number of costumers’ remains low and the SBSC are running on approximately 35 to 40 % of their capacity on average. This is partly due to the lack of rechargeable batteries. Most of the batteries brought to the SBCS are car batteries that are not suited for delivering a steady amount of current over a longer time but the only ones which are readily available in rural areas. Many households cannot even afford to buy a car battery and others have second hand batteries which are in such a poor condition that recharging them is impossible. Many potential customers had to be rejected by the operator due to the bad state of their battery. However, even those who do not own a battery profit indirectly from charging services as they can watch TV in their neighbours’ home or have their mobile phone recharged by someone owning a battery.


The maintenance of all solar installations including communal PV systems and an acceptable level of profit for the operator is not guaranteed if the degree of capacity utilisation does not reach 60 to 70 %. Currently, only in one municipality is the revenue high enough for the operator to pay the total fee. In the other municipalities the operators meet on a monthly basis with the management committee and representatives from the town hall to discuss the repartition of the revenue. In this way it is avoided that the operator is discouraged.


Almost all municipalities have had large difficulties in mobilising their share. This led to major delays in the construction of the SBCS as the communal contribution had to be paid directly to the construction companies. The municipalities, who were also the contracting authority, were unwilling to put the construction companies under pressure to terminate the construction as they were depending on the goodwill of the contracted companies to pre-finance the communal share. These dependencies sometimes resulted in less transparent awarding of contracts to construction enterprises. In addition, the inhabitants of the municipalities could not be easily mobilised to contribute their manual support for construction.


A positive development of the programme is that the private operators have begun to install solar home systems, sell solar lanterns and provide after-sales services in the rural municipalities that go beyond the original ELCOM intervention.


Lessons Learnt

The in kind contribution by the village community will be not included any more and more emphasis will be placed on a direct financial contribution. It was difficult to mobilise the whole community to perform their allocated tasks and resulted in an unfair distribution of work among the inhabitants.

Monthly monitoring of SBCS management during the first months of operation is absolutely necessary. The technicians as well as the operators need support to use the provided management tools.

Technical monitoring has to be done about every two months during the first six months to demonstrate presence and prevent misuse of the equipment installed. It also helps in capacity building regarding end-users, operators and technicians. For technical monitoring it will be necessary to develop a maintenance plan that operators can follow when they visit the installations.

In order to avoid over-capacity and reduce costs for both, the project and the municipalities, the number of SBCS, their capacity and the selection of the villages where they will be located, will be based on the result of detailed feasibility studies which will take place in the intervention area in the future. In order to ensure business profitability, wealthier municipalities should be selected where people have the means to buy quality batteries and charge them on a regular basis. Small commercial centres where electricity is required for productive use, are also better suited. Other factors such as network coverage for mobile phones and TV signal coverage have also to be taken into consideration. This experience shows the difficulty in providing electricity to the poorest and the necessity of having customers which have a certain level of income to assure the sustainability of the intervention.


Example Cambodia

A handful of solar battery stations (or rather solar assisted or with diesel generators as back up) are in place in Cambodia:

  • Kamworks piloted a SBC station at an already existing battery charging station, yet stopped after half a year as the operator was not satisfied- the timing was not ideal as the project started in the rainy season, when solar irradiation is not sufficient.Also, the donated solar panels did not reach electricity generation expectations.
  • 4 SBCS have been 100% funded through the GEF Small Grants Programme under UNDP.they are community owned. Charging rates are lower than at diesel operated charging services.part of the income is saved within the community for later maintenance and repair, yet the amount is very low. The remaining money is used to pay the operator.
  • LOCAB has been partner of the GEF Small Grants programme and has also installed privately owned and funded solar battery charging stations in very remote regions, e.g. Mondulkiri (Gold Mine villages in the mountains).
  • GIZ also cooperated with LOCAB in a iPPP solar battery station with a private investor in Kampong Chnang province. 2.88 kWp of solar panels were installed to charge around 45 batteries (around 50 Ah). GIZ provided an improved charge controller, testing equipment, training for the operator and customers as well as marketing support and support in accessing a loan. Yet, the cost of taking out money has been so high that the operator could not repay his loan with his income from solar battery charging.


Experiences from Cambodian Solar Battery Charging Stations (SBCS)

  • The initiative capital investment is an obstacle that needs to be overcome
  • Owners of existing battery charging stations are reluctant to invest, due to huge capital investment compared to diesel battery charging station, yet solar could be competitive due to very high diesel prices in Cambodia (|> 1.25 USD7l)
  • Sun shine time (weather) is not constant, changes from day to day, especially in rainy season but even in dry season. Hence, some diesel is needed nearly every day.
  • Information on the possibilities and functioning of solar energy is not widely spread, awareness needs to be created
  • The business model and technology is new which needs to be explained to customers in order to overcome obstacles
  • Customers are used to batteries being hot when they collect them from diesel run battery charging stations as these tend to overcharge the batteries. When batteries are charged properly at a solar station, they are not as hot which is why customers are of the opinion that they have not been charged. In Many cases customers complained that batteries became empty more quickly when charged with solar. The charging quality, according to them, was not satisfactory.
  • A lot of awareness raising and training is needed.
  • Very old car batteries are used. It is very difficult to change (de-)charging habits and educate customers about the advantages and importance of solar charging and the proper usage of batteries.
  • There are allegedly more than 10,000 charging stations in Cambodia. Due to the poor charging technologies and low level of know-how of operators, focus should be put on capacity building with regards to technical aspects of charging, including safety and efficiency issues. With little effort, a lot of energy can be saved. At the moment, due to the high price of diesel, many diesel charging stations are not profitable as operators do not calculate all of their costs when pricing their services. Diesel charging is often a side business of rural business men.
  • Even in areas where the grid is reaching, battery charging stations are common as they supply the poorest households who cannot afford grid connection. Also, batteries are used in times of pore cuts, for water pumping on the fields, etc.
  • As the price for a kwH from a battery charged with diesel is the most expensive form of energy and as it is at the same time often the only source of electricity for rural households, which are among the poorest in Cambodia, new ways of providing these households with electricity need to be found.
  • The efficiency of using solar energy to old car batteries is very low, especially keeping in mind the current level of know how with operators. If donors support rural electrification, battery charging is only a short time bridging technology which serves the lowest needs. Investing in solar home systems or rural mini grids (running on biomass, solar, or hybrid systems) will be a more sustainable investment with greater quality energy services.


Key Success Factors for Solar Battery Charging Stations (SBCS)

In general SBCS are comparably expensive, but can be an economic solution:

  • Remote areas, which are not connected to the grid
  • Where there is cell phone network
  • Where diesel fuel costs and battery transport costs are high
  • Income and energy demand are low


Important aspects to be considered for the success of SBCS are:

  • Extensive marketing
  • Additional services to be offered such as renting/selling batteries or recharge services for mobile phones or shaving heads
  • Training of all local operators and technicians



Further Information


References