[luhn]

They claim 0.05€ (~0.06USD) per KWh lifetime cost. Anybody know how that compares to current prices of grid-scale batteries? I can't find a up-to-date source.

[aidenn0]

Pumped hydro is about 3x as expensive, and batteries I think are still more expensive than pumped hydro, so it's absurdly cheap.

[petre]

Pumped hydro and flywheels are at least demonstrated cost effective solutions. This? They don't even provide any details.