Energy Storage Wars: 3 Products Going Head to Head With Tesla's Powerwall Three of the biggest residential solar companies in the U.S. are adding energy storage to the mix.

New functionality and improvements are added with updates to Powerwall firmware and to the Tesla mobile app. Tesla is finalizing its Powerwall solution for 3 phase homes, specifically for the APAC region, with a planned timing of late 2018–2019 to bring the 3 phase unit to market. Tesla Powerwall improves over time with regular over-the-air software updates.