Sand battery can store energy for months at a time
An entire town in Finland could very well get a lot of its heat from a giant sand battery before too long. The new battery has officially been announced and will be built by Polar Night Energy. It’s a really clever concept that will essentially just be made up of a massive silo filled to the brim with tons of sand or a similar material.The idea here is to pump excess energy generated during a spike from renewable energy sources and then transfer it into the sand using a heat exchange. The company says that the…