When Tesla (NASDAQ: TSLA) introduced the Powerwall in 2015, it was the start of a race toward energy storage becoming a standard offering with residential solar. At the time, the Powerwall was meant to be a backup system for homeowners, but the promise was that eventually, it would offer the opportunity to take a home almost entirely off the grid.
There have been fits and starts for Tesla's Powerwall business, and to date, it hasn't really moved the needle for Tesla in comparison to electric vehicles. And today companies like Sunrun (NASDAQ: RUN), Sonnen, and SunPower (NASDAQ: SPWR) are offering their own energy storage solutions. SunPower's recently announced Equinox Storage, which pairs with its Equinox solar product, may be the most complete offering yet.
Image source: SunPower.