Crowdfunding aims to prove that solar power is a bankable sector

Last year, $244bn (£149bn) poured into global renewable investments. But only a tiny amount of that trickled down to where it is needed the most – to provide power to the two billion people without access to energy. The UN's goal of universal access to modern energy by 2030 will require an annual investment of up to $41bn a year. Progress to date has been slow, to say the least.