• 13 Posts
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Joined 2 years ago
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Cake day: June 14th, 2023

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  • I forgot to add that I’m with Octopus Energy. Their Octopus Go plan offers great rate overnight and is not too bad during the day at lest in our area. Their free energy sessions have also been in active use: battery charge, EV charge, immersion heater and sauna stove being on simultaneously does put the house electrical system to a test!

    My aim is to use as much of the solar energy I produce myself, so I’m not bothered about exporting energy.


  • Solid advice right here.

    I have 13.5 kWh battery storage that I charge overnight with cheap electricity if needed. During winter I could do with more storage.

    I control charging of the battery (and EV) automatically based on expected solar production the following day, which I estimate using a forecast model I re-train couple of times per week based on latest data. The model uses Met Office weather model forecast for our area as input. Most days it’s accurate to within 1 kWh.

    I have 16 LG panels spread so that they produce almost from sunrise to sunset + 5 kW inverter. This has worked really well. There is plenty of power to run air conditioning in the summer and even charge the EV, but winter months are meh. Sunny summer day: 25-30 kWh, winter 1-5 kWh.