Would you mind sharing some details on the 54kWh battery for €6500? I'm looking for one and this sounds like a crazy deal.

It's this one: https://balansenergie.nl/

They're a startup trying to get to the minimum amount of MWh to become a 'virtual power plant'.

It seems it's 48kwh, apologies. And it seems the cheapest batch is already sold out: it's now €6500.