> The round-trip energy efficiency of PSH varies between 70%–80%, with some sources claiming up to 87%. For me, that sounds like quite good, given the capacity

> The round-trip energy efficiency of PSH varies between 70%–80%, with some sources claiming up to 87%. For me, that sounds like quite good, given the capacity possibilities. We can always build tiered storage, with smaller, but more efficient tiers (e.g. batteries) used first and PSH when that's filled up or exhausted.