Here's a way to store heat from renewables .... Could be used and is cheap...
https://electrek.co/2022/07/08/sand-energy-storag ... %20heating.
https://www.goodnewsnetwork.org/finland-innovativ ... en-energy/
https://www.bbc.com/news/science-environment-61996520
This could also be heated with solar or any other energy that is available.
You could also use off peak electric to heat the sand. It is much more economical to store energy as heat rather
than electric especially if the final use is as heat anyway.
BigBarney
Storing heat in sand in Finland
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