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Wisconsin Net-Metering Rules

Date Last Updated8/13/2014
Policy TypeNet-Metering Policy
State/FederalWI
Policy Administrator/Contact OfficePublic Service Commission (PSC) of Wisconsin
Policy Initiation Date1/26/1982
Policy SummaryThe Wisconsin PSC issued an order on January 26, 1982, requiring all regulated utilities to file tariffs allowing net-metering to customers that generate electricity with systems, including CHP, up to 20 kW in capacity. The order applies to investor-owned utilities and municipal utilities, but not to electric cooperatives. There is no limit on total enrollment or total aggregate net-metered capacity. The PSC has not adopted administrative rules for net-metering. Net-metering is used for all customer-owned generation of 20 kW or less. This means that the amount of energy the customer takes from the grid is offset by the amount of generation it sends to the grid. If the customer is a net purchaser, it will be billed at the energy rate for its class of customer. If the customer is a net seller, it is paid one of two buy-back prices based on the fuel source. For non-renewable fuel sources, the price is based on a negotiated contract that is the same as generators over 20 kW. For renewable fuel, generally described as wind, solar photovoltaic, biomass, or wood waste, refuse derived fuel, or hydroelectric, the buy-back rate is the energy rate for its class of customer.

Some utilities allow net-metering for systems larger than 20 kW. In all cases, excess generation rates, carry-over processes, and capacity limits vary by utility. These provisions are specified in the utility tariffs. Customer net excess generation (NEG) is generally credited at the utility's retail rate for renewables, and at the utility's avoided-cost rate for non-renewables. NEG credits are carried over to the customer's next bill. If NEG credit exceeds $25, then the utility must issue a check for the amount, payable to the customer.

Under the tariff rules, a parallel generation customer in Wisconsin is currently required to pay the utility the cost of all equipment and wiring for meter installation and for interconnection and parallel operation. In addition, the customer is required to pay for the cost of rebuilding any utility facilities required to adequately accommodate the parallel generation system.
CHP Eligibility RequirementsBoth fossil-fueled and renewably-fueled CHP systems are eligible for net-metering.
Eligible Project Size (MW)Systems up to 20 kW are eligible to net-meter (some utilities allow for larger systems).
Minimum Efficiency Required/
Other Performance Requirements
Does Not Specify
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