d.light solar installations have changed the lives of millions.

Decade-old startup d.light has sold solar-powered lanterns and lights to millions of customers in off-grid rural areas like Sub-Saharan Africa.

But now the company, founded by two Stanford entrepreneurs, is shifting its focus to grow its business of selling larger, more powerful solar panels and solar-powered gear like radios and fans. Their complete home solar product can hold its own against a traditional power grid connection and a local electronics store, but for a fraction of the cost.

D.light CEO and co-founder Ned Tozun, who spoke to Fortune on the phone from Nairobi, says that’s the entire point. “We think solar will leapfrog the electric grid, like cell phones have leapfrogged landlines in Africa and Southeast Asia,” he says.

On Wednesday morning, d.light announced that it had raised another round of $22.5 million in funding to grow its home solar business. About $15 million of that was in the form of equity from investors that specialize in energy investments in the developing world, […]