Re: $2/kwh is a lot of money
My electric rate is about $0.10/kwh, so that's 20x the market rate.
And just where are you?
PG&E's rate is about $0.34.
SDG&E's Tier 1 rate was 34.5 cents/kWh as of Jan 2022.
SCE's rate is around $0.30/kwh.
So just where are you getting electricity in California for 1/3rd the going rate?
$2/kwh is NOT much money for energy storage. Each charge/discharge cycle shortens the life of your very expensive battery pack... That's why the vast majority of folks with solar panels remain connected to the grid. Pulling power from a remote power plan is vastly cheaper than batteries.
The term for this is: Levelized Cost of Storage (LCOS).
According to the first source I found, the Tesla Powerwall comes in at about $0.30/kwh LCOS.
If they were offering $0.30/kwh, which is 3X what you say you're paying for electricity, absolutely NOBODY in their right mind would sign-up... you'd be losing money.
Sources:
https://climatebiz.com/tesla-powerwall-cost/
https://ertpw-ratemailer-updater.s3.us-west-2.amazonaws.com/OutPutFiles/07-07-2022%2020:45:59.141/Peninsula%20Clean%20Energy%20(PCE)%20PG&E_ResidentialE1_07052022.pdf
https://www.cpuc.ca.gov/-/media/cpuc-website/divisions/energy-division/documents/electric-costs/sb-695-reports/electric-and-gas-cost-utility-reports-from-ious/sdge--2022-recommendations.pdf
https://ertpw-ratemailer-updater.s3.us-west-2.amazonaws.com/OutPutFiles/08-18-2022%2015:28:16.665/Clean%20Power%20%20Alliance%20(CPA)SCE_Residential_08152022.pdf