Rebates

Much of the information presented in this summary is drawn from the U.S. Department of Energy’s (DOE) Building Energy Codes Program and the Building Codes Assistance Project (BCAP). For more detailed information about building energy codes, visit the DOE and BCAP web sites.

On February 1, 2014, the Guam Tropical Energy Code was adopted as part of the Guam Building Code. The purpose of the new code is to provide minimum design requirements in order to achieve energy efficiency in all new buildings and renovations.

The Uniform Building Code (UBC) was adopted with provisions that allow the Guam Department of

Eligibility and Availability

In 2004, Guam enacted legislation (Public Law 27-132) 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  (Public Law 30-141) and raised the system capacity limits to 25 kilowatts (kW) for residential systems and 100 kW for non-residential systems. In February 2024, the non-residential cap was expanded to 500 kW by Public Law 37-71. However, non-residential systems in excess of 250 kW must be paired

Bill No. 1-37 of 2023 provided an exemption from property taxes for photovoltaic solar panels and photovoltaic roof tiles installed on buildings.

Requirements 

Guam Public Law 29-62, enacted in March 2008 established  a renewable energy portfolio goal of 25% renewable energy by 2035. The goal was expanded in November 2019 by Guam Public Law 35-46 and now requires the Guam Power Authority to establish a preliminary renewable energy portfolio goal according to the following schedule:

• 5% of net electricity sales by December 31, 2015
• 50% of net electricity sales by December 31, 2035
• 100% of net electricity sales by December 31, 2045

The Guam Power Authority is also required to undertake all interconnection requirements or outsourcing agreements, including, automatic generation control, 

Note: Guam has also adopted a tropical energy code.

The Guam Energy Code, which became effective in October of 2000, requires that piping stub outs be provided for water heaters installed in low-rise residential buildings to enable the future installation of solar collectors.