@Jeremiah Leonard ,
If you own the solar through cash purchase or finance, it will add value to your home. This is according to NAR and other studies. If using zero down finance, you have no out of pocket and you can have your tenants pay the monthly for the solar system (with a caveat that if they use excess power from the utility they are liable for that).
In that scenario, you've added value to your home, your roof is an income producing asset instead of a liability and you are having that paid for by other people. Seems a good deal to me. I am in the industry for full disclosure.
Thanks for the reply, it makes sense for a long term investment, have you Flipped any properties with Solar?
For flips I don't think solar makes anywhere near as much sense. You have to cash buy the systems rather than finance (at least with the solar finance offered). While they appraise and it's definitely doable to get dollar for dollar, that's not really what you're looking for. In some markets it will make the home easier to sell without question and I have customers who added systems for that reason.
In CA it will make increasing sense as it is mandatory for all new construction under three stories to be equipped with solar systems starting Jan 2020. That means if you're flipping in CA you'll be competing with brand new homes that are solar equipped.