Heron Power, backed by Andreessen Horowitz and Breakthrough Energy, is scaling up production of solid-state transformers that move power to the grid more efficiently.

It wasn’t their first idea, but it was the one with staying power — up to 240 volts of it. After pitching a few ideas for an electrical engineering senior capstone project to their professor, student ...

Nikola Tesla, a brilliant engineer, revolutionized electricity with his alternating current system. His innovations powered ...