[rch]

Based on my experience living in a large home in Colorado designed for passive solar heating, the trees would block the windows in summer so we'd stay comfortable without AC, but the sun was really intense in what should have been the cooler months. I'd definitely do some thorough modeling before building one of my own.

Along with solar thermal and photovoltaics, I'd use a redox flow battery for long term storage, and a GEK for emergency generation (too loud for casual use).

- https://www.allpowerlabs.com/products/gasifier-kits

[ZeroGravitas]

This prompted me to think about oversizing pv and solar gains, then using a heat pump to extract the excess heat in the summer.

Seems like it would work:

https://www.researchgate.net/figure/Concept-for-enabling-inc...

[DubiousPusher]

> but the sun was really intense in what should have been the cooler months. I'd definitely do some thorough modeling before building one of my own.

I mean sure but like in the worst case, window shades are a thing.

Edit: Or maybe this isn't about passive heating and you're saying long term storage might not be necessary in winter?

[rch]

The largest windows didn't have shades, but some did. We'd also use free standing shades to help keep specific areas cool.

Some of the features of RMI's Carbondale office would probably be worth considering as part of a more thoughtful design.

Also, you're correct that there was never a need to store energy for months on end, at least at our latitude.

[DubiousPusher]

I expect altitude plays a role as well. I grew up in Montana. 5,000ft plus sunrays are gnarly.