this post was submitted on 22 Apr 2024
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… and domestic batteries to grab that lovely more-than free energy
Exactly. Batteries to hold it when its free
I have batteries that I use for my solar - but here in the UK electricity pricing frequently goes negative in the winter at night to due to a surplus of wind power. a few simple automations make sure when that happens my batteries start charging and my electric water tank heater turns on. My energy company now has a scheme where they will do it all for you if you opt in - automagically getting your batteries to charge when it makes financial sense for you.
It's a simple system if you have the supplies
Well it runs on a Raspberry Pi 4 about £50 all in.