loading . . . Construction of a 250MWh super-giant 'sand battery' has begun, reducing fossil fuel emissions by 60% by heating and storing heat in sand Finnish company Polar Night Energy , which specializes in the design and manufacture of high-temperature thermal energy storage systems, has begun construction of a 250MWh 'sand battery' in Vaakus, so... https://gigazine.net/gsc_news/en/20251201-250mwh-sand-battery/
