Using heat for energy storage and then converting back to electricity are ok if you don't care about cost of electricity, the facility or the maintenance. In ba

Using heat for energy storage and then converting back to electricity are ok if you don't care about cost of electricity, the facility or the maintenance. In basically all other cases they are some of the worst ideas. We have much better technologies that are known for the last ~50 years. They are simple, they do work and have volumetric energy density within striking distance of fossil fuels however don't include carbon. Just reading the expired US patents would reveal that. I guess there are worse things to invest into but come on, we teach the physics needed to comprehend why this is a bad idea in high school.