How big a solar battery do I need to store *all* my home's electricity?
shkspr.mobi
I have a modest set of solar panels on an entirely ordinary house in suburban London. On average they generate about 3,800kWh per year. We also use about 3,800kWh of electricity each year. Obviously, we can't use all the power produced over summer and we need to buy power in winter. So here's my question: How big a battery would we need in order to be completely self-sufficient? Background …

Neat breakdown with data + some code.

      • Valmond@lemmy.worldEnglish
        5·
        22 hours ago

        I have seen some wild priced on Ali, in your link the 75Ah and the 210Ah are priced the same, so I guess it’s for the smaller one, 30€ for ~0.225kWh or 133€/kWh.

        Could be wrong ofc, but it sort of fits what I thought it would roughly be.

        • TropicalDingdong@lemmy.worldEnglish
          2·
          21 hours ago

          I mean even ~133/kWh…

          Whats an average, perhaps even gratuitous, level of consumption per household? 24kwh if you are running a clothes drier and an AC nonstop? Lets go nuts, say you are a DIY enthusiast and hosting your own servers, so 36kwh daily.

          3192€-4788€ to be and you can be effectively energy independent with a small solar system.

          Triple that and you are truly energy independent are any where south of the English channel. I mean obviously its money out of pocket, but its a fixed cost that you pay now, instead of a variable cost that continuously goes up. It just seems basic.

          • Valmond@lemmy.worldEnglish
            2·
            11 hours ago

            Sure, but at 16€/kWh well that’s a whole other ballpark. Buy one 36kWh for < 600€, put it in your car, charge at work 😋 style of different.