Arizona Solar Center Blog

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Updated Feb. 16, 2014

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Updated January 4, 2014

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Solar energy is harnessed, converted and distributed using a range of ever-evolving technologies and strategies. Passive solar energy is characterized by building orientation, strategies that integrate the house with its climatic environment, and materials that have favorable thermal mass.

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Updated December 15, 2013

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In 2006, the Arizona Corporation Commission (ACC) established a requirement that 15 percent of retail energy sales from ACC regulated electric utilities come from renewable energy resources by the year 2025. A portion of that energy (30 percent) must come from distributed resources (DR), or what is commonly referred to as distributed generation (DG) technologies. Half of the DG requirement must come from residential applications and the other half from non-residential/non-utility applications. The requirement applies to investor-owned utilities and electric power cooperatives serving retail customers in Arizona. Distribution companies with more than half of their customers outside Arizona are exempt.

The Goldwater Institute challenged the REST rules in court and in 2007 Arizona's Attorney General Terry Goddard certified the rule as constitutional.

The compliance schedule by year is outlined below:

• 2006: 1.25%
• 2007: 1.50% (5% DR)
• 2008: 1.75% (10% DR)
• 2009: 2.00% (15% DR)
• 2010: 2.50% (20% DR)
• 2011: 3.00% (25% DR)
• 2012: 3.50% (30% DR)
• 2013: 4.00% (30% DR)
• 2014: 4.50% (30% DR)
• 2015: 5.00% (30% DR)
• 2016: 6.00% (30% DR)
• 2017: 7.00% (30% DR)
• 2018: 8.00% (30% DR)
• 2019: 9.00% (30% DR)
• 2020: 10.00% (30% DR)
• 2021: 11.00% (30% DR)
• 2022: 12.00% (30% DR)
• 2023: 13.00% (30% DR)
• 2024: 14.00% (30% DR)
• 2025: 15.00% (30% DR)

Contact Your Utility for Details About REST Program Incentives

The following links connect to the REST program details for Arizona electric utilities and cooperatives regulated by the Arizona Corporation Commission. Salt River Project, which is not regulated by the ACC, also offers incentives similar to REST incentives.

• Ajo Improvement Company
• Arizona Public Service (APS)
• Duncan Valley Electric
• Graham County Electric
• Mohave Electric Cooperative
• Morenci Water and Electric Company
• Navopache Electric
• Salt River Project (SRP)
• Sulphur Springs Valley Electric Cooperative
• Trico Electric Cooperative
• Tucson Electric Power (TEP)
• Unisource Energy Services

The funding available for the each program is limited. The incentives are funded by a small surcharge approved by the ACC and added to customers' electric bills. The approved amounts vary among the utilities. Each utility has an application and reservation process for obtaining funding. It is important for customers to contact their utility directly before investing in renewable energy equipment to obtain specific information on program requirements, funds availability, and the process followed by the utility for approvals and installation.

For more information, see the complete ACC docket (~10 MB PDF):

The Renewable Energy Standard and Tariff rules, Arizona Administrative Code ("A.A.C.") R14-2-1801 through -181 5

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Disclaimer: This section of our website provides an overview of financial and other incentives available to Arizona residents and businesses for installing and operating systems that utilize solar energy.

The Arizona Solar Center provides this 3rd Party information as a service. The policies and status of programs change frequently. The Solar Center is not responsible for information that is out-of-date or inaccurate. The reader is individually responsible to fact-check all program details before making financial or other types of decisions.

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This 30% residential solar property tax credit is currently in effect for property placed in service after December 31, 2008 through to December 31, 2016. The credit enables individual taxpayers to offset AMT liability, and to carry unused credits forward to the next succeeding taxable year.

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The federal business energy tax credit is a 30% tax credit available to commercial businesses that invest in or purchase energy property in the United States.  Energy property is defined as either solar or geothermal energy. Solar energy property includes equipment that uses solar energy to generate electricity, to heat or cool (or provide hot water for use in) a structure, or to provide solar process heat. Geothermal energy property includes equipment used to produce, distribute, or use energy derived from a geothermal deposit. For electricity produced by geothermal power, equipment qualifies only up to, but not including, the electrical transmission stage.

The energy property must be operational in the year in which the credit is first taken. The property must also be constructed by the taxpayer and used by the taxpayer. Energy property does not include public utility property, passive solar systems, pool heating, or equipment used to generate steam for industrial or commercial processes.

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Arizona provides state tax incentives for the sale or installation of “solar energy devices,” as these devices are defined within the Arizona Revised Statutes (A.R.S.). Transaction privilege (“sales”) tax exemptions apply to retail sales of solar energy devices, and installations of such devices under the prime contracting classification. Certain state income tax credits are also available.

Transaction Privilege (“Sales”) Tax Exemptions:

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Homeowners can claim a 25% tax credit on up to $4,000 of solar devices installed on a residence (effectively a maximum credit of $1,000). This is a one time tax credit and restricts the homeowner for additional credits for solar purchases made for the same residence in subsequent years.

The law establishing the tax credit imposed several requirements on the seller of solar devices in order to qualify the equipment and application. Title 44, chapter 11, article 11 of the Arizona revised statues (44-1761- Definitions, and 44-1762 - Solar energy device warranties; installation standards; inspections) detail the requirements. The Arizona Department of Commerce has issued guidelines (in 1993) for the required certificate to the buyer that the solar energy device complies with the requirements of the tax credit. the Arizona Registrar of Contractors later assumed this responsibility but has not yet issued any further requirements.

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Updated February 15, 2014

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(Updated January 2004) The following companies products are certified by the Solar Rating and Certification Corporation (SRCC). The tables below give the estimated annual performance for all OG-300 certified solar water heating systems. There are separate tables for each company. The systems are listed by company name, system name and model number. The energy savings is the estimated annual performance. This value is the quantity of energy that did not have to be provided by electricity or gas because of the contribution of the solar water heating system. For more information on SRCC go to http://www.solar-rating.org.

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Updated: January 21, 2014

In the desert regions of Arizona, a family of four typically spends more than $300 per year on electric water heating. By installing a solar water heater, the state's desert homeowners could save between 50 and 90 percent on their bill (depending on the efficiency of the solar water heating system and the amount of hot water used). The Solar Rating and Certification Corporation (SRCC) has compiled a list of solar water heaters and their efficiencies.

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	NREL PV Watts Calculator NREL's PVWatts™ calculator determines the energy production and cost savings of grid-connected photovoltaic energy systems throughout the world. It allows homeowners, installers, manufacturers, and researchers to easily develop estimates of the performance of hypothetical PV installations.

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Economic Benefits of Solar Explanations of how a variety of solar applications are not only economically viable, but in many cases economically beneficial.

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Utility Scale Solar

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©2001 This email address is being protected from spambots. You need JavaScript enabled to view it.

Go to Sidebar 1, Maintain Temperature Stratification in Your Tank
Go to Sidebar 2, Rust Never Sleeps: Open Loop vs. Closed Loop

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©2001 This email address is being protected from spambots. You need JavaScript enabled to view it.

Go to Sidebar 1, Maintain Temperature Stratification in Your Tank
Go to Sidebar 2, Rust Never Sleeps: Open Loop vs. Closed Loop

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