Ask anyone who has lived in Nigeria what NEPA stands for, and they will tell you it stands for Never Expect Power Always. The National Electric Power Authority (NEPA) was the state monopoly that, for decades, generated the country’s electricity, carried it across the country, and sold it to Nigerians, badly. The joke outlived the institution, but the problem it named did not. The generators still hum outside shops and homes, and the grid still delivers a fraction of what the country needs. The…