Reading your post I can only conclude that no such storage tech usable on scale exists. You talk about potential tech, so far used only experimentally at little

Reading your post I can only conclude that no such storage tech usable on scale exists. You talk about potential tech, so far used only experimentally at little scale with many issues. Hydrogen is a dream and nothing really seems to arrive, beside the obscene complexity and high costs of all existing prototypes. Pumped hydro with small fall and unfavorable orography it's formally still working but practically useless since it cost much and produce very little energy: we basically need a hill for a single home. grid-connected domestic lithium batteries are the sole effective tech, only at that small scale, with a high but still a bit sustainable cost, actually available commercially. If you want a domestic or city-side compressed-air storage good luck, you'll have to design it as an artisanal prototype. Hydrogen is the very same and so on. Consider a thing: we need energy NOW and in 10, 20+ etc years. Stating that we have some potential tech that might work at a certain scale in a future is stating that IF we survive without food for a decade well... Perhaps at the end of it we will be able to source some food. Is just a scam, not a plan nor something we can do. In the meantime our national grids falter DUE to the amount of connected renewables that makes the grid load vary too quickly of significant amounts for big power plants to compensate quickly enough. Actually the theory of the new deal is that with a smart-grid (that do not exists so far, while p.v., eolic etc do) and a large private BEV connected (because on average many are connected to the grid at the same time) we can compensate high and low demand peaks allowing classic power plant to keep the network up. So far we have much p.v. because grid connected p.v. works enough (roughly 50% cut in electricity fees, relatively quick break even, not so high initial capex) and wind power have many incentives BUT number of BEV on roads are very modest and none of them is "smart grid ready" with power connection and proper inverter/meter to follow the frequency sucking or pumping energy from/to the grid instant by instant with correct billing as an extra bonus. In most countries it's not even legal inject power from batteries to the grid. Please tell me with something valid on scale today, something that exists currently, that we can store energy and keep the network up with massive renewables if you know it. I do not. I tried, I follow news etc and see nothing but the offload of many costs to the public, pretending that's a good thing, and an uneven new deal implementation whose results will be a very deep big mess. All presented with classic PR fanaticism, not much different than nazi propaganda of a new bright future no one feel or foresee in tangible manners. A bit like classic meddle-age church rhetoric that you have to suffer the whole life for a promise of a paradise no one can prove it exists. Again not different than URSS propaganda for a future worker paradise no one see. Just try to figure out a thing: how much thermal energy you need for your own home. How much electricity and equipment costs you need to heat with electricity. Then extend such computation to the mean citizens try to find how many can afford such investments and if yes how much extra power we need from the grid. This normally suffice without adding industry needs. Because it's already clear that if you live in inner lands (cold nights) or sufficiently at northern/southern latitudes (depending on the hemisphere) most people simply can't choose to go electric without rebuilding the home from scratch and most of them can't rebuild the home.