Storage capacity is the amount of energy extracted from an energy storage device or system; usually measured in or and their multiples, it may be given in number of hours of electricity production at power plant ; when storage is of primary type (i.e., thermal or pumped-water), output is sourced only with the power plant embedded storage system.
As of February 2025, prices now dance between ¥9,000 for residential setups and ¥266,000+ for industrial beasts.