For the moment it looks good. They pay us 38.4 cents/kHW from the solar. The system cost about $32000 to purchase/install, so direct payoff looks like about 6-7 years.

They try to keep it at about that level, adjusting the payout downward as new installations get cheaper -- people down the street from us put theirs in perhaps five years ago, at a much higher cost, but with a 20-year contract for about 80cents/kWH.

However, given that the retail price is due to (likely) triple within 10 years, the price they pay us versus what we pay them will equalize long before the 20-yrs is up. It's still tax-free income, until the $32000 is paid off, so pretty good value for now.