What about DG systems over 25 kW?
OEC allows interconnection for DG systems up to 3 mW but Net Metering is limited to systems 25 kW or less. For systems over 25 kW, the co-op will install separate facilities to the generator and the power will be delivered directly to our distribution system. The output is metered and OEC pays the owner of the generator for the power output at the wholesale or avoided cost rate (approximately 3.5¢ per kWh). This is called Power Export.
It is important to note that the larger the DG system, the more of an impact it will have on OEC’s distribution system. Consequently, OEC has more requirements for interconnection of DG systems over 25 kW. For more information, please contact OEC’s Engineering Department.
What are OEC’s voltage requirements for Net Metering?
Since OEC’s distribution system and DG systems operate as parallel power sources, the DG system must be the same voltage as OEC’s service. For residential accounts, this is almost always single-phase, 120/240V 60 Hz.
What happens if OEC has a power outage?
If OEC loses power, the DG system should shut down. If the DG system remained in service, it would actually back-feed and energize OEC’s line, a very dangerous and potentially deadly situation for OEC linemen.
What does OEC require of a member who wants to install a DG system of 25 kW or less?
All equipment for DG systems that are Net-Metered are on the member’s side of the meter; therefore, OEC is not directly involved with the installation. OEC does require:
- Member to submit an application;
- Member to furnish certification from manufacturer or engineering firm that equipment meets IEEE 1547 and other applicable codes and standards;
- Member to use an Oklahoma licensed electrician/electrical contractor;
- Installation of a separate, lockable, OEC-accessible safety disconnect;
- Execution of a contract between OEC and the member;
- Final inspection by OEC.
OEC requires the DG system to comply with all applicable laws, ordinances, rules and regulations of any federal, county, state and/or local authority, including, but not limited to: the most recent IEEE Standard 1547 Guide for Distributed Generation Interconnection and applicable ANSI Standards, including ANSI C84.1 Range A, relating to installation, safety, easements, code restrictions, operation and other matters.
OEC’s DG information packet – includes FAQs, DG Agreement (short form contract) and Application for DG systems of 25kW or less
OEC/WFEC DG Procedures and Guidelines Manual – a procedures and guidelines manual developed by WFEC, OEC’s power supplier, and adopted by OEC.
American Wind Energy Association – the national trade association for the U.S. wind industry
SolarBuzz – for the latest news, research findings and industry trends
Oklahoma Wind Power Initiative – investigates and promotes wind energy in Oklahoma
U.S. Department of Energy’s Office of Energy Efficiency & Renewable Energy
Database of State Incentives for Renewable & Efficiency (DSIRE) – a comprehensive source of information on incentives and policies that support renewables and energy efficiency in the U.S.
OEC WindWorks Information