[ernestipark]

I have a large 20kw system for an old leaky farmhouse and it provides me about $6k in energy and credits a year.

I like thinking about it as a near guaranteed, medium return long term investment that's good for the environment. Each year is roughly 13% returns and I should get that for at least 20 years or so.

[edmundsauto]

This may change - California, for example, just passed an adjustment to the payback prices that will drop them by 75%.