It's still not earning you money to spend electricity because you still have to pay the transfer fee which is around 6 cents / kWh but it's pretty damn cheap nevertheless, mostly because of the excess in wind energy.
Last winter because of a mistake it dropped down to negative 50 cents / kWh for few hours, averaging negative 20 cents for the entire day. People were literally earning money by spending electricity. Some were running electric heaters outside in the middle of the winter.
It doesn’t have to be complicated, or the complexity is related to the use case. Does not need water or moving parts.
Consider a single radiator in a house. You only need storage sufficient to use that radiator for one day. And it doesn’t matter too much if it can’t cover extreme temperatures, as long as it is sufficient to cover peak prices most of the time
I finally found one. Why aren’t there choices like
Edit to circle back to the goal: now I can move toward cleaner energy by electrifying my house. I can save energy/money by using the most efficient heating technology. If there was thermal storage, I could save even more money with “time of use” metering and the utility can shift their load to make up for the peakiness of sources like solar. If I installed solar on my roof, I could potentially heat my house entirely with “free” energy
yeah, but if you're not doing it in a complicated manner you could just stick an IBC tote full of water in the middle of your home and it would provide a similar effect.
Personally i would probably just install a ground loop, and then use that to provide a source for heating and cooling, it's also very consistent year round, though if you live in an area of deep frost lines, or permafrost, it's probably going to be more exciting.
Unfortunately a ground loop can be expensive, especially for those of us in urban areas.
I read an analysis once that you could never make back the cost on energy saved. Whether or not that’s always true, I know I live in a high cost area with a yard that a drill couldn’t get to, cris-crossed with 80 years of utilities.
that's true, though to be fair i'd be the one installing it, i'm not paying other people to dig a hole lol.