A heat battery for sustainable home heating - Heat pump In fact - CLIMAX
And here’s a Hampshire (UK) company that’s getting a heat battery into the market aimed at decarbonizing home heating in the UK ( https://bit.ly/3xMTosH ).
The idea is to provide a replacement for gas boilers that are prominent in countries such as the UK with a "greener" option that can store electricity from the grid (especially electricity during off-peak time) and release it when needed.
Powered by electricity (hopefully from renewable sources), the heat is stored in a patented material and utilized when needed by the end user. This material is claimed to store heat for a long time - the inventor says it can take up to 19 days for the temperature to come down from 500 deg C to 200 deg C.
Sounds pretty interesting