Mitsubishi Power Americas’ spinout BESS solution firm Prevalon has entered into a long-term supply deal with lithium-ion battery OEM Rept.

As well as Elon Musk remarking that the company may have had its “best ever quarter” for solar since the SolarCity takeover, Tesla’s energy storage deployments have enjoyed a ramp up, while a fellow exec hinted the stationary battery business is constrained by cell supply.