Field Performance Measurements of Amorphous Silicon Photovoltaic Modules in Kenya

Our research team measured the performance of 130 amorphous silicon (a-Si) photovoltaic (PV) modules and 17 crystalline PV modules at 145 homes in rural Kenya. We also purchased 14 a-Si modules in Nairobi that we tested at outdoor testing facilities in the US and Kenya. We used an outdoor IV test method that has an accuracy of ±5% and a repeatability of ±5% for clear sky conditions. The large majority of the a-Si PV modules sold in Kenya are made by three different manufacturers. Our results show that modules made by two of the a-Si PV module manufacturers are an effective, low cost alternative to crystalline PV. However, the poor performance of modules made by one manufacturer indicates a need for measures to ensure the high quality of all modules sold in the Kenyan PV market.