That's a pretty good return. I paid around $20k for my system (parts and installation) and get ~$1700 a year out of it (I live pretty far north). After tax cred

That's a pretty good return. I paid around $20k for my system (parts and installation) and get ~$1700 a year out of it (I live pretty far north). After tax credits and other state incentives I break even in 7 years. Output is warrantied by the manufacturer for 25 years (there's a schedule, but should still be 85% at 25 years IIRC). It's a great time to get solar if you own your home.