Reply To: ‘Sand batteries’ could be key breakthrough in storing solar and wind energy July 7, 2022 at 11:55 am #190132 struthParticipantRead that. Finland I think. There are water batteries too but I couldn’t decipher exactly what it didCurrent Car: Hyundai Kona Premium EV...2 way 40kg hoist Last Car: Toyota C-HR Excel Hybrid...4 way 80kg hoist