Generation Interconnections

Important info for authority-having jurisdictions and solar contractors: CORE Electric Cooperative no longer requires production meters for Residential (10kW AC and below) and Commercial (25kW AC and below) Net Metering, effective Oct. 1, 2022. CORE still requires production meters for Residential above 10kW AC and Commercial above 25kW AC. See below for full details on all of CORE’s requirements for interconnections.

Generation Interconnections

If you use solar, wind, biomass, new hydropower, recycled energy or hydrogen fuel cells and your generation capacity is less than 10 kilowatts for your home, or 25 kilowatts for your commercial or industrial business, your generation system may be eligible for CORE’s net metering. Larger systems may also be eligible to interconnect as Qualifying Facilities and be subject to reimbursement from CORE for power generated to the electric grid. Applications for interconnection and system requirements are set forth in the following documents:

Net-metered systems and systems 25 kilowatts or less

Qualifying systems less than 5 megawatts

Qualifying facilities larger than 5 megawatts and less than 10 megawatts

Qualifying facilities larger than 10 megawatts

Refer to the requirements in our Large Generation Interconnection Procedures

Energy storage systems with renewable generation

In addition to the documents above, refer to our Energy Storage Procedure

Generators and energy storage for back-up power

Net Metering FAQs

How does net metering work?

The energy your interconnected renewable system generates directly offsets energy that CORE provides you on a kilowatt-hour-to-kilowatt-hour basis. If your system generates more energy than you consume, it is delivered to CORE’s distribution system. If, during a monthly billing period, the energy delivered to CORE exceeds the amount of energy delivered to you from CORE, that energy is credited and carried forward to offset use in future months. An annual “true-up” is performed each year within 60 days of the end of the April billing cycle, at which point CORE provides a bill credit or refund for any remaining excess generation accrued at CORE’s avoided cost of power, as calculated by CORE for the previous calendar year.

What are distributed generation (DG) resources?

DG systems are small-scale, on-site power generating sources located at or near members’ homes or businesses. Some common examples include rooftop solar panels, micro-turbines, small wind and combined heat and power systems. Members with these types of generation systems connect to the local electric grid and use the grid both to buy power from CORE during times when their DG systems are not producing enough to meet their needs and to sell power to CORE when their systems are producing more electricity than is needed.

What is meant by net metering?

Net metering is a billing function that allows members with DG resources to offset their energy usage by their DG output and effectively “sell” any excess electricity generated by their DG systems back to CORE at the retail rate.

What costs are included in CORE’s current net-metering energy rate?

The energy your interconnected renewable system generates directly offsets energy that CORE provides you on a kilowatt-hour-to-kilowatt-hour basis. If your system generates more energy than you consume, it is delivered to CORE’s distribution system. If, during a monthly billing period, the energy delivered to CORE exceeds the amount of energy delivered to you from CORE, that energy is credited and carried forward to offset use in future months. An annual “true-up” is performed each year within 60 days of the end of the April billing cycle, at which point CORE provides a bill credit or refund for any remaining excess generation accrued at CORE’s avoided cost of power, as calculated by CORE for the previous calendar year.

What is meant by avoided cost?

The avoided cost of energy in this context refers to the cost associated with fuel, purchased energy, generated and purchased capacity, and line losses (expressed as a per-kilowatt-hour cost) CORE can avoid by purchasing the energy from a net-metered member. CORE’s avoided cost is approximately 4.5 cents per kilowatt-hour.

For more information on net metering, call (303) 688-3100, ext. 5302, or (800) 332-9540. If you want more information on renewable energy, consider purchasing Renewable Energy Credits.