net meter v.
Instead of paying for electricity in October, the Jerome man got a $4 credit from Idaho Power, courtesy of the 80-foot wind turbine he erected in June.
The turbine, with its 29-foot blades, can generate about 20 kilowatts of power, enough to meet Myers' needs, plus some extra power. . . .
Some utilities such as Idaho Power will let customers sell their power through a process called net metering, where power is sent to the grid and customers get credit if they produce more than you use.
Margaret Wimborne, "The winds of change - Small-scale wind farms make sense for some," Idaho Falls Post Register, December 14, 2002
"PNM wins wind power case at PSC, but must file new avoided-cost rates," Electric Utility Week, September 12, 1983
This is done by means of a device called an inverter, which is normally used to convert the direct current produced by a solar or wind generator to the alternating current that homes prefer. The inverter can be set up to ship excess energy backward through the electric meter to the utility company. The meter literally spins in reverse (not surprisingly, a synonym for net metering is reverse metering) and the returned energy is "saved" on the grid (in the form of a kilowatt credit) for future use by the household. If the house uses less energy than it generates, the customer is either not billed or gets a rebate.
In the U.S., net metering programs are in place in 37 states, and countries such as Germany and Thailand also allow net metering. (Several Canadian provinces are considering net metering programs.) In jurisdictions where net metering isn't legal, some consumers are doing it anyway. I'll talk about this solar civil disobedience in tomorrow's post.
off the grid