Interconnection and Net Metering

The combination of interconnection and net metering is essential to cost-effectively realize the benefits of distributed solar energy.

Utility partners prepared a Best Practices guide to highlight efficient metering and interconnection processes. See an interactive web version of the guide, which includes more examples.

Training

Find webinars and materials from past workshops on our interconnection training page.

Expediting the Process

Utilities can adopt the following standard forms:

Additional Resources

Webinar | Meeting the Solar Interconnection Rush

Northwest SEED, Seattle City Light, Snohomish PUD, and Puget Sound Energy discuss opportunities and efforts to improve the customer service side of interconnection. Delivered March 26, 2015

Distributed Generation Interconnection Collaborative

Report | IREC Model Interconnection Procedures

IREC has participated in dozens of state utility commission rule makings and has identified emerging best practices in these updated model procedures. Published April 2013.

Report | Washington UTC Interconnection Generators Rulemaking UE112-133

The Washington UTC is completing a multi-year process to revise rules for interconnection of electric generators under WAC 480-108.  The proposed rules are expected to be adopted in the summer of 2013.

Website | Freeing the Grid

Now it its sixth year, this policy guide from Network for New Energy Choices grades all 50 states on net metering and interconnection best practices. Updated 2013.

Webinar | Streamlined Interconnection for Solar PV

ESSP partners WA Department of Commerce, Northwest SEED, Seattle City Light, Snohomish PUD, and Puget Sound Energy explain current interconnection practices and opportunities for process improvements. Delivered December 4, 2012.

Report | Streamlined Interconnection for Solar PV

Developed by the Evergreen State Solar Project, this report provides a detailed look at the interconnection process and potential improvements thereto. Published October 18, 2012.

Report | Federal Energy Regulatory Commission Small Generator Interconnection Procedures and Screens

The FERC SGIP contains the technical procedures that a small generator and utility must follow when connecting the generator to utility lines subject to FERC jurisdiction (that is, when the project is not net metered.) The standards are embodied in a single set of ten screens for the 10kW Inverter Process and the Fast Track Process. Published July 2010.