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Incentives/Policies for Renewables & Efficiency

Printable Version
Guam - Net Metering   

Last DSIRE Review: 08/27/2014
Program Overview:
State: Guam
Incentive Type: Net Metering
Eligible Renewable/Other Technologies: Photovoltaics, Wind, Biomass, Hydroelectric, Fuel Cells, Small Hydroelectric, Fuel Cells using Renewable Fuels, Microturbines
Applicable Sectors: Commercial, Industrial, Residential, Nonprofit, Schools, Agricultural, Institutional
Applicable Utilities:Guam Power Authority
System Capacity Limit:Residential: 25 kW
Non-residential: 100 kW
Aggregate Capacity Limit:Not addressed
Net Excess Generation:Determined by PUC
REC Ownership:Not addressed
Meter Aggregation:Not addressed
Authority 1:
Date Enacted:
Guam Public Law 27-132
Authority 2:
Date Enacted:
Date Effective:
Guam Public Law 30-141
Authority 3:
Date Enacted:
Date Effective:
Guam Public Law 32-095

Guam's Public Utilities Commission (PUC) reviewed net metering and interconnection during a regular meeting in February 2009 (Docket 08-10). Please contact the Guam PUC for the results of that docket review.

Eligibility and Availability
In 2004, Guam enacted legislation requiring the Guam Power Authority (GPA) to allow net metering for customers with fuel cells, microturbines, wind energy, biomass, hydroelectric, solar energy or hybrid systems of these renewable energy technologies. In 2010, Guam amended net metering and raised the system capacity limits to 25 kilowatts (kW) for residential systems and 100 kW for non-residential systems.*

Net Excess Generation

Customer-generators may be billed on a monthly basis, or with their written consent, on a quarterly, semi-annual or annual period. If a system has produced net excess generation at the end of the billing period the customer-generator is entitled to compensation at a rate to be determined by the Guam Public Utility Commission (PUC). The PUC was required to adopt rules to implement net metering within 120 days of the effective date of the authorizing legislation. As of April 2008, the PUC has not adopted rules for net metering but is considering them through their work on an Integrated Resource Plan.

Public Law 32-095, enacted November 27, 2013, raised the net metering cap for vendors who will install solar panels at public or private schools. The law allows the Guam Dept. of Energy to enter into power purchase agreements with all schools, administrative, and ancillary buildings for up to 25 years.

Cost-Effectiveness and Program Evaluation 

GPA must provide customer-generators with a bi-directional energy meter and may, at its own expense, install additional meters. GPA may not charge customer-generators any fees above and beyond those it charges to other customers in the same rate class that do not use a net-metered energy system.

Electric Demand and Energy Reduction Standard

Net-metered systems must meet all applicable safety and power quality standards established by the National Electric Code, Underwriters Laboratories (UL) and the Institute of Electrical and Electronic Engineers (IEEE). The utility may not require customer-generators whose systems meet these standards to meet further requirements, install additional controls or purchase supplemental liability insurance.

*Note: the original net metering law system capacity limit was 25 kW, regardless of customer class.

  General Contact
Guam Energy Office
548 North Marine Corps Drive
Tamuning, GU 96913
Phone: (671) 646-4361
Fax: (671) 649-1215
Web Site:
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Disclaimer: The information presented on the DSIRE web site provides an unofficial overview of financial incentives and other policies. It does not constitute professional tax advice or other professional financial guidance, and it should not be used as the only source of information when making purchasing decisions, investment decisions or tax decisions, or when executing other binding agreements. Please refer to the individual contact provided below each summary to verify that a specific financial incentive or other policy applies to your project.

While the DSIRE staff strives to provide the best information possible, the DSIRE staff, the N.C. Solar Center, N.C. State University and the Interstate Renewable Energy Council, Inc. make no representations or warranties, either express or implied, concerning the accuracy, completeness, reliability or suitability of the information. The DSIRE staff, the N.C. Solar Center, N.C. State University and the Interstate Renewable Energy Council, Inc. disclaim all liability of any kind arising out of your use or misuse of the information contained or referenced on DSIRE Web pages.

Copyright 2014 - 2015 North Carolina State University, under NREL Subcontract No. XEU-0-99515-01. Permission granted only for personal or educational use, or for use by or on behalf of the U.S. government. North Carolina State University prohibits the unauthorized display, reproduction, sale, and/or distribution of all or portions of the content of the Database of State Incentives for Renewables and Efficiency (DSIRE) without prior, written consent.