So what scales better? Off river PHES is cheaper, but limited in scope. Electrolysis works but only for long duration. PWRs have no fuel supply if expanded. The

So what scales better? Off river PHES is cheaper, but limited in scope. Electrolysis works but only for long duration. PWRs have no fuel supply if expanded. They also cost more and the historic highest construction is not to the same scale as the current renewable + lithium battery supply chain.