In rural West Africa, 150 million people are currently living without electricity.

Oolu, a Y Combinator company launching today, aims to reduce this number by delivering affordable solar energy to West Africa’s off-grid population, beginning in Senegal.

Despite the surge of innovation in solar storage and panel technology, Oolu founder Daniel Rosa says that many people living in rural areas of West Africa still walk miles to the nearest city to charge their cellphones and purchase kerosene for lanterns.