Oh yeah that would be interesting re: free energy period and charging the battery back up. I had crunched the numbers a while ago, but should look at it again. I'm guessing it's not possible to actually remove yourself from the grid fully so that you don't need to worry about the daily supply fee ?
We're pretty light on with energy usage, kids in bed early, no tv(still use screens obviously) generally no heating just some extra layers. Not sure.. I think it's probably the bloody kettle boiling that uses most of our power.. Edit: our base hourly usage is about 0.2kwh (say over night -fridge, router etc) then we really only have a spike in the morning and from about 6-8pm
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