Promising salt batteries for heat storage

https://techxplore.com/news/2023-11-salt-batteries-storage.html

"salts tested for availability, safety, compactness and recyclability... heating strontium chloride salt releases water vapor.. adding back water vapor releases heat again... heat from pv solar panels extracted by boiler and used to heat house/ shower with excess heating 10 m3 of salt, which corresponds to two to three wardrobes. With that quantity natural gas no longer needed and heat stored in summer can be used in winter"

Comments from Revolution-Green: "Rather expensive, that much strontium salt would cost ~$30k or more... also, if the demand for Strontium Chloride rises, the cost will too. Needs something a lot cheaper now and in massive supply" http://disq.us/p/2wplbjw

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Passive Photovoltaic Cooling: Advances Toward Low-Temperature Operation
https://onlinelibrary.wiley.com/doi/abs/10.1002/aenm.202302662