Running a small business can be tough at the best of times, but trying to run one without a reliable source of power adds a whole new dimension. For Noella Uwimana, who runs a chicken farm in rural Rwanda, a stop-start electricity supply was severely impacting her business.
"When the grid power… (was) gone, in the evening the chickens were killing each other. Each morning, between five or six chickens were dead," she told CNBC's Sustainable Energy.
Uwimana's chickens – and her business – are now benefiting from the use of a "plug and play" solar system devised by graduates from Imperial College London.
"Now, we are using the solar energy immediately when we have a power cut," she said.