Warren Buffett’s NV Energy has won approval from Nevada utility regulators to add 1.2GW of solar PV and 590MW of battery energy storage to its system by the end of 2023 from three projects under development in the western US desert state.

The commitment by Las Vegas-based NV Energy, part of billionaire investor Buffett’s Berkshire Hathaway conglomerate, is among the largest for both technologies in the US.