@Sasquatch Sas, my initial reaction is there is no way I would take over the solar payments.
1) The previous owners (or local solar company) already got the benefit of the Federal Tax rebates
2) Pacific Gouge & Extortion screws you in how much they pay you to purchase the electricity your panels generate (Last time I checked, I think PG&E paid 2.5 cents per kilowatt hour). Pacific Gouge & Extortion charges (E1 plan) 22.98 cents per kWh you use, and it quickly rises to tier 2 prices (28.92 cents per kWh) then tier 3 where PG&E charges you 50.66 cents per kWh you use. You will be paying for the previous home owners decision. (https://www.pge.com/tariffs/assets/p...SCHEDS_E-1.pdf)
3) On top of that, Pacific Gouge & Extortion is making money (approx. 20 cents per kWh that your panels generate). They also charge you a fee (monthly?) for the privilege of you using their grid as a battery.
4) Most solar panels manufactures say their panels suffer a 0.5% to 1% efficiency loss every year. However, typically, they only warranty it for more than 3%. Find out what make of panels are on the roof, then go to their website and look at their warranty. In this example, I looked at Astronergy Solar (https://pdf.wholesalesolar.com/modul...682.1429114599 )
5) What shape are the roof shingles in? How long will they last before they will need to be replaced?
6) Look at the contract that the previous home owner signed. I bet there isn’t a clause stating they will pay to have the panels removed (so they shingles may be replaced) and put the panels back. If not, most companies charge $5,000 to remove and reinstall them so you can re-roof.
There are other reasons not to take over his payments, but I think you get the idea.
I wish you and Nursey the best of luck getting your first home.