Global investors are turning to Africa with renewed focus, drawn to six fast-growing sectors: agriculture, critical minerals, data centers, renewable energy, oil and gas, and manufacturing. Tens of billions of dollars are already flowing into the continent this year, as global trade realigns in response to U.S. tariffs.

Arnergy, co-founded in 2013 by CEO Femi Adeyemo and Kunle Odebunmi, is a Nigerian cleantech company dedicated to providing reliable and...