My Vermont utility charges $0.20/kwh and I get a credit of $0.15/kwh for power returned to the grid. So its not really net metering. So the question is, can I justify a Powerwall? If I charge a PW during the day from my solar and use that power at night, it is worth 20 cents and if just dump the extra power from daylight onto the grid I lose 5 cents / kwh. So what are the parameters? For at least part of the year (summer) I could essentially be off grid. During the winter with no "net metering" credit accumulated and next to no solar production, back to full retail price for purchased power.
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Vermont "net metering"
- Thread starter kbellairs
- Start date
How much are you pushing back to the grid daily? If it is a lot and you use a lot of energy after the solar stops producing, then there may be a possibility. But it probably won't be a quick payback. If an installation costs $10,000 (I have no idea a real number) that's 10 years if you are saving $80/month. Incentives may help, but it can still be a long payback.
From Vermont, I don't expect a high AC cost, and I'd assume that you are on non-electric heat.
From Vermont, I don't expect a high AC cost, and I'd assume that you are on non-electric heat.
Maximapolak
Member
Did some figuring. If I could fill up a 2 box system every day and use it all overnight, I'd save about a dollar a day, I think. Local install is about 13K. So the net metering differential would have to be a lot bigger. And I cannot really justify that kind of money as backup for occasional (I hope) power outages.
