Their solar business, which they purchased, has declined every year since the acquisition
Until now. "The company marked a 26% quarter-on-quarter increase in solar installations"
https://cleantechnica.com/2020/01/29/tesla-energy-lifts-off-...
Right now revenue from energy storage resembles Tesla's auto business in 2013[1].. so if it grows at the same rate...
[1] https://twitter.com/kerooke/status/1222637828741439488