[AtlasBarfed]

So with home solar panels and storage getting cheaper and cheaper and better and better, where is the optimization point of investing in better insulation vs just buying more solar panels?

Especially if the solar panels may produce profit on sunny mild days about 40-50% of the year if there is reverse metering and the like?

[maxwell86]

Insulation beats solar panels. It’s not only much cheaper to get, but also to maintain.

The body heat of a family of 4 is enough to heat a well insulated house.

Solar panels are there to supply electricity for use. The last step of passive houses are zero-energy houses, which means that they don’t get electricity from the grid.