> At a bare minimum, it's not obvious that what GP wrote is "just wrong". This isn't something we have a definite answer to. I agree that we don't have definit

> At a bare minimum, it's not obvious that what GP wrote is "just wrong". This isn't something we have a definite answer to. I agree that we don't have definite answers, but that's why what the GP wrote is just wrong. They're reducing a very complicated set of technologies to the economics of lithium ion batteries. While yes, pumped hydro is something of a cop-out, it's clear there are a variety of techs that are cheaper than lithium ion. The economics of this are also a little unclear to me. In the presence of sustained negative electricity prices, it seems obvious in principle that lots of storage technologies would suddenly become economical. But it's hard to imagine how that would work given the way we currently finance these things. (And by extension, it's not clear to me that this is actually a technical problem so much as a political one.)