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National REC Tracking Systems
Currently, seven major regional renewable energy certificate (REC) tracking systems operate in seven different regions of North America, with a set of common purposes. REC tracking systems provide a basis for creating, managing, and retiring RECs, ensuring that each REC is counted only once.1 Tracking systems are also the vehicle through which load-serving entities (LSEs) demonstrate compliance with state renewable energy and related environmental policies, including renewable portfolio standards (RPS).2
Current Regional North American REC Tracking Systems, or Registries
| Tracking System | Primary Region(s) | Launch Date |
| Texas Renewable Energy Credit Program, run by the Electric Reliability Council of Texas (ERCOT) | Texas | January 2002 |
| NEPOOL-Generation Information System (GIS) | New England | July 2002 |
| PJM-Generation Attribute Tracking System (PJM-GATS) | Delaware, Indiana, Illinois, Kentucky, Maryland, Michigan, New Jersey, North Carolina, Ohio, Pennsylvania, Tennessee, Virginia, West Virginia and the District of Columbia | Sept 2005 |
| Western Renewable Energy Generation Information System (WREGIS) | Alberta, Arizona, British Columbia, California, Colorado, Idaho, Montana, Nebraska, Nevada, New Mexico, Oregon, Texas, Utah, Washington, and Wyoming | June 2007 |
| Midwest Renewable Energy Tracking System (M-RETS) | Illinois, Iowa, Manitoba, Minnesota, Montana, North Dakota, South Dakota, and Wisconsin | July 2007 |
| North American Renewables Registry (NARR) | States and provinces not covered by the regional markets | February 2009 |
| Michigan Renewable Energy Certification System (MIRECS) | Michigan | October 2009 |
| Nevada Tracks Renewable Energy Credits (NVTREC) | Nevada | 2007/2008 |
| North Carolina Renewable Energy Tracking System (NC-RETS) | North Carolina | 2010 |
Links
Environmental Tracking Network of North America
Inter-registry transfer capability
Publications
Environmental Tracking Network of North America (ETNNA), 2010. The Intersection Between Carbon, RECs, and Tracking: Accounting and Tracking the Carbon Attributes of Renewable Energy. White Paper, February. (PDF 406 KB)
Environmental Tracking Network of North America (ETNNA), 2009. System Changes to Serve a Federal RES. June. (PDF 164 KB)
Environmental Tracking Network of North America (ETNNA), 2009. Inter-registry REC Transfers. June. (PDF 146 KB)
Footnotes
1From www.apx.com.
2A renewable portfolio standard requires an electricity supplier to include a required minimum percentage of electricity produced by renewable sources in its mix of electricity supplied to retail customers.
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