Many states already have net metering in place for at least some small customer-generators.
Table 4 describes the terms and conditions of the net energy metering programs in these states. Given the prevalence of net metering programs, surprisingly little information has been published regarding the number of customer-generators participating in net metering programs or the resources being used to power the generating facilities subject to net metering. Anecdotal information obtained while developing the information in Table 4 suggests that participation in most states is very limited. For example, Public Service of New Hampshire estimated in 1994 that it had 16 customers with 158 kW that qualified for net metering. The technologies most often used for net metering appear to be wind energy and small-scale hydropower, although there is very little information available on this point.