Personally I like the idea of an electric car doubling as a house battery but so far I think only the F-150 lightning is capable of doing that.
Personally I like the idea of an electric car doubling as a house battery but so far I think only the F-150 lightning is capable of doing that.
In general yes, grid solar + grid batteries are cheaper than any peaking power plants. So now 24/7 batteries + wind + solar generally outcompetes nuclear, coal, or natural gas on price as long as there’s no tariffs involved.
This isn’t enough to make batteries + solar viable in Alaska but long distance transmission lines could solve that issue cost effectively.
If the basement rock is close to the surface and is crystalline, it probably involves deep mining to form cavities, which would raise the capex by maybe an order of magnitude. Other options could become cheaper then, say storing ammonia.
This is for large scale storage, of course, not for individual residences.