It’s energy divison hasn’t even started.
They have been working on it for 9 years... when are they going to start?
“On April 30, 2015, Tesla announced that it would sell standalone battery storage products to consumers and utilities.”
Tesla's “Megapack” grid batteries despite the hype are going to be manufactured in China and are still a lithium based solution... At the present time basically all lithium based batteries are still present a fire hazard. These massive batteries likely will be a significant challenge for both the environment and firefighters. If anyone can overcome these limitations it likely is Musk and Tesla, but I would not hold my breath, lithium batteries do not have an energy density that is any where close to hydrocarbon fuels. Pumping water up a hill during times of slack demand and then generating power using hydroelectric generators during times of peak demand is still likely to be a much simpler and less dangerous solution that would not have to be manufactured in China out of an increasingly rare metal.
“Ecological devastation is a bleak reality
The environmental fallout from lithium mining is clear and far-reaching. Massive quantities of fresh water, classified as a precious resource in these arid regions, are diverted for lithium mining operations, fueling the salt flats brine. This leaves local communities and wildlife parched. Sulfuric acid and sodium hydroxide used in lithium extraction penetrate the soil and water, poisoning ecosystems and endangering species. Research from the journal Proceedings of the Royal Society shows that two flamingo species in Chile are threatened because of lithium mining.”
https://www.mining-technology.com/analyst-comment/lithium-mining-negative-environmental-impact/