SOME ELON MUSK SYNERGY: SolarCity, Using Tesla Batteries, Aims to Bring Solar Power to the Masses. “The batteries could help businesses lower their utility bills by reducing the amount of power they draw from the grid. They could also help address solar power’s intermittency, which could prevent it from becoming a significant source of electricity. The batteries are being supplied by Tesla Motors, whose CEO, Elon Musk, is SolarCity’s chairman.”