http://www.mlslistings.com/

… writes, “There will be some changes coming from RETS” [Real Estate Transaction Standard] “that will include “green” fields and will likely be included in an upcoming modification to our data input. I will do some additional research to see if it will include solar.”

Think there’s something substantive to your hint …

I. After a solar energy systems is implemented, one other factor would be light induced degradation (LID) and when the photovoltaic (PV) system was installed to determine value. Varies by type of module at approximately ~1% per year, … Also the value may be different depending on the schedule and value of energy if based on time and usage for the occupants. If value of energy based on time, the azimuth of the array to the south west or south east would be a factor.

II. Before a solar energy system in implemented, a factor would be the inverse. If a location has yet to implement a solar power systems, then potential of solar may be considered as a “solar lot.” In comparison of locations, one with solar as a resource, and one without solar as a resource. A calculation based on kWh/year can be performed to compare the potential on the roof, ground, …