[Yosemitest]

The real expense (or so I've been told) is the battery bank for storage and the regulator/convertors.
Best to back it up with a wood burning heater, that can burn your paper trash also.

[dhs12345]

Passive energy doesn’t generate electricity. It uses the heat energy to heat the house and provide hot water.

[Prophet2520]

Battery bank, converters etc, are ACTIVE PV electric systems, NOT passive solar. They can be great to but the payback is long. You are essentially buying 10-20 years of energy in advance.