Hi folks, in particular @kev1n , @miimura , @RE Insider :
I have a 60 panel solar generator in Bay Area and am on EV-A after doing some cost comparisons. After comparing last couple years to the other choices, it seems that was the best choice, although it wasn't obvious at the time compared to the time-shifted alternates, which are no longer available. In previous posts I've thanked @miimura for incredibly useful spreadsheet calculators, predating what PG&E has only done recently (without details) on their website for EV and TOU rate comparisons. Thank you again! Like @kev1n, I looked earlier at the powerwall and it didn't make sense even in optimal conditions (charging at night and discharging at peak) based on cost. At that time, I would only do it for backup generation during power failure, but Tesla changed their options and the best battery for daily use is incompatible for deep discharge, i.e. generator usage. @miimura, do you think this cost calculus has changed with SGIP rebates? Then there is Keith (@RE Insider) -- I noticed clicking on your link gives a special referral page to Swell energy -- so what is your financial connection and benefit to the advice you are giving here? Are you a vendor, and/or getting remuneration for referrals? It would be best to disclose your financial interests if you are soliciting on this site. Your advice about when to charge and the cap on different PG&E rates is well known to those of us who already did the math. What is up for debate is the financials of battery storage and all that I would require is some real numbers on cost, max kWh charge/discharge per day (cycle count) and ability or non-ability to use as back-up generator (or limitations therein if infrequent) and I could do my own calculation, and the others on the thread I'm sure will appreciate your full disclosure.
I have a 60 panel solar generator in Bay Area and am on EV-A after doing some cost comparisons. After comparing last couple years to the other choices, it seems that was the best choice, although it wasn't obvious at the time compared to the time-shifted alternates, which are no longer available. In previous posts I've thanked @miimura for incredibly useful spreadsheet calculators, predating what PG&E has only done recently (without details) on their website for EV and TOU rate comparisons. Thank you again! Like @kev1n, I looked earlier at the powerwall and it didn't make sense even in optimal conditions (charging at night and discharging at peak) based on cost. At that time, I would only do it for backup generation during power failure, but Tesla changed their options and the best battery for daily use is incompatible for deep discharge, i.e. generator usage. @miimura, do you think this cost calculus has changed with SGIP rebates? Then there is Keith (@RE Insider) -- I noticed clicking on your link gives a special referral page to Swell energy -- so what is your financial connection and benefit to the advice you are giving here? Are you a vendor, and/or getting remuneration for referrals? It would be best to disclose your financial interests if you are soliciting on this site. Your advice about when to charge and the cap on different PG&E rates is well known to those of us who already did the math. What is up for debate is the financials of battery storage and all that I would require is some real numbers on cost, max kWh charge/discharge per day (cycle count) and ability or non-ability to use as back-up generator (or limitations therein if infrequent) and I could do my own calculation, and the others on the thread I'm sure will appreciate your full disclosure.