About 69,000 Arizona Public Service solar customers are grandfathered in a favorable net metering rate plan (as more money is paid for the electricity that is sold back to the utility) that lasts 20 years from installation. This status is transferrable to new owners during that time. However customers who signed a solar panel installation contract after 8/31/17 don’t get the favorable plan, and will receive less for the energy they sell back to APS. The solar industry says that the unavailability of grandfathering will reduced the economic advantage of solar, and will negatively impact sales of homes with solar panels. I disagree, but if there is any effect, it could be on homes with solar leases, which already have disadvantages. For more, read my blogs on Solar Lease Transaction Traps.