Oolu, a solar distributor in West Africa, has closed a $8.5 million series B investment round led by independent renewable energy developer RP Global. Additional participating investors included Persistent Energy Capital, Shell-seeded impact investor All On, Gaia Impact Fund and DPI Energy Ventures.

Oolu’s mission is to provide affordable energy access to rural and peri-urban customers in West Africa. Since its inception in 2015, the company has sold over 60,000 solar home systems to...