With the price of solar so much cheaper than anything else, solar will almost certainly be overbuilt times of solar output exceeding overall demand. This will p

With the price of solar so much cheaper than anything else, solar will almost certainly be overbuilt times of solar output exceeding overall demand. This will probably lead to negative energy spot prices at specific times during the day. People will want to figure out a way how to use this energy. Maybe it will be pumped hydro, batteries, compressed air, or hydrogen. Maybe it'll even lead to colocation with aluminum smelting or something like that. The point is something needs to be figured out how to handle the increasingly excess energy supply. Each technology has a different set of tradeoffs. Hydrogen is a potential but if it has any chance of succeeding, the technology has to be built now and quickly. Once a specific solution has momentum, it will be difficult to overcome. Large scale batteries seem to have the lead for now but the weight efficiency has always been an issue. I imagine at least one of the more weight efficient solutions will gain some reasonable % of market share.