"In the Mid-Atlantic Technical Resource Manual, it is 15 years. This is the "official" document used by Maryland, Delaware and DC. The source is a study done in Connecticut. Air Sealing starts on p 247. …"
"Jim, I agree, but the problem is really a rate structure issue. Since distribution is billed per KWH that is distributed, rather than a fixed charge, you absolutely have to change net metering laws to the wholesale rate. People with PV…"