Tesla Powerwall - Made in the US, 10 year warranty, quoted as $14,100 for 2 Powerwall batteries (13.5 kWh each = 27 kWh) = $522/kWh, but then factor in the Federal tax credit for solar projects and it is $366/kWh.
Yes, the starting price of a Powerwall is less than $1000/kWh. I guess that’s an advantage a company that can sell products for years and lose billions of dollars has over other companies. Maybe I should take advantage of the situation.
I can also get the same capacity out of lead acid batteries from Rolls Surrette, which I have been using at the house for 7 years, for $6000 and take advantage of the same tax credit. I expect my exciting batteries to last another 7 years, as a 15 year service life is not uncommon.
There is still promise on the horizon. I’ll probably install solar and upgrade the motorhome to lithium within 2 years, before the tax credit goes to zero. The home upgrade to lithium will be a gamble between 2 years and a 22% tax credit or 7 years and possibly lower lithium prices or some new magic bullet battery technology.