This is more a personal post than an electric vehicle post. I follow several renewable energy YouTube channels, and this company (SUNAMP) is mentioned on many of them. They have developed a thermal battery that stores/absorbs heat. The truly interesting connection is that the SUNAMP "thermal store" technology is used to reduce the load on electric delivery vehicle batteries. Their thermal batteries handle heat storage/transfer better than adding a commensurate amount of lithium-ion batteries to power the delivery vehicle air conditioning equipment.
Please view an interesting article comparing SUNAMP to Tesla here.