Inter seasonal summer-winter storage is a different market, where you can have more ratio of soil to less pipe. Even so, the ground loop pipes are often the most expensive part of a GSHP system.

Think its like lithium vs vanadium vs pumped storage - different tech for different storage durations.

April 10, 2026 - 09:23 UTC

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Yes this is what I was saying - you can do one or the other but there are reasons for taking the "big above-ground tank" approach. Plus, at the high temps they can use heat to generate electricity (nowhere near as efficient as using the heat for heat, but it's another arrow in the quiver I guess.)
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