this post was submitted on 17 Sep 2025
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O, god, it's going to be huge. You really can't do the off-grid thing unless you have enough power production to satiate you over any given 3-day moving window. Trying to store power from summer until winter is going to be too expensive, instead buy more panel.
This isn't even going into the fact batteries lose charge slowly. So any power generated in summer will be much diminished by winter, even if you have big enough batteries.
Holy shit. I think we used that much last month, which is higher than average but not that high for August around here.
How ? Is it just AC ?
We oscillate between 300 and 800kwh per month and it's with an old water heater, an electric car charged at home, a dryer and electric oven.
Older house, poor insulation, 19 year old heat pump/AC, and hot summers.