In Iowa, the market value added to a property by a solar or wind energy system is exempt from the state's property tax for 5 full assessment years. Residential geothermal systems are exempt for 10 years. Eligible systems include:

• a system of equipment capable of collecting and converting incident solar radiation or wind energy into thermal, mechanical, or electrical energy and transforming these forms of energy by a separate apparatus to storage or to a point of use which is constructed or installed after January 1, 1978;
• a system that uses the basic design of the building to maximize solar

Active solar heating and cooling systems may not be assessed at more than the value of a conventional system for property tax purposes. This law applies only to active solar systems and does not include any land or structural elements of buildings, such as walls and roofs, or other equipment ordinarily contained in a building. Specifically, a "system" includes all controls, tanks, pumps, heat exchangers and other equipment used directly and exclusively for the conversion of solar energy for heating or cooling. Systems placed on residential, commercial and industrial property are eligible for this exclusion.

In 1999, the Public Utility Commission of Texas (PUCT) adopted a rule, Goal for Renewable Energy (P.U.C. Substantive Rule 25.173), that sets the state's renewable portfolio standard (RPS) based on a bill enacted by the Legislature as part of restructuring in Texas (see S.B. 7). Texas’s RPS mandates 5,000 megawatts (MW) of new renewables be installed in Texas by 2015 (for a cumulative net capacity of 5,880 MW of renewable energy, or 5.4% of the state's summer net capacity in 2012) and sets a target of 10,000 MW of renewable energy capacity by 2025. 

According to the annual

Puerto Rico offers a 30% tax deduction (up to $1,500) for expenses incurred in the purchase and installation of solar equipment to heat water for residential use. "Solar equipment" is defined as "any equipment capable of using solar energy directly or indirectly to heat water, whether such equipment is bought or manufactured by the taxpayer, provided that the same is operating." The deduction applies to those who lease or own the residential property.

An individual who claims the solar equipment deduction must enclose with his or her tax return a certificate stating that the solar equipment has been approved by

Note: S.B. 448 of 2021 extended this property tax abatement to include energy storage systems paired with eligible renewable energy systems.

New or expanded businesses in Nevada may apply to the Director of the State Office of Energy for a property tax abatement of up to 55% for up to 20 years for real and personal property used to generate and store electricity from renewable energy resources including solar, wind, biomass*, fuel cells, geothermal or hydro. Generation facilities must have a capacity of at least 10 megawatts (MW), and must plan to be in operation for at least 10 years

In Wisconsin, any value added by a biogas, or synthetic gas energy system, solar-energy system, or a wind-energy system is exempt from general property taxes. The exemption applies regardless of whether the equipment is deemed real property or personal property.

A fact sheet on this exemption is available: https://www.revenue.wi.gov/DORFAQ/renewable-energy.pdf

A link to the request form for this exemption is available: https://www.revenue.wi.gov/DORForms/pr-303.pdf

Eligible Technologies

A solar-energy system is defined as "equipment which directly converts and then transfers or stores solar energy into usable forms of thermal or electrical energy, but does not include equipment or components that would be present as

The Texas property tax code allows an exemption of the amount of 100% of the appraised property value increase arising from the installation or construction of a solar or wind-powered energy device that is primarily for the production and distribution of thermal, mechanical, or electrical energy for on-site use and devices used to store that energy.

Under H.B. 2500 (2013), solar energy devices installed or constructed on or after January 1, 2014, used for a commercial purpose are subject to the cost method of appraisal, and the depreciated value must be calculated using a useful life of 10 years

New Jersey's 1999 electric-utility restructuring legislation created a "societal benefits charge" (SBC) to support investments in energy efficiency and "Class I" renewable energy. The SBC funds New Jersey’s Clean Energy Program (NJCEP), a statewide initiative administered by the New Jersey Board of Public Utilities (BPU). The NJCEP provides technical assistance, financial assistance, information and education for all classes of ratepayers. NJCEP energy-efficiency programs and renewable-energy programs were initially managed and implemented by New Jersey's seven investor-owned electric public utilities and gas public utilities, but on April 1, 2007 management was turned over to third-party program managers Honeywell Utility Solutions and

Note: This exemption may not be allowed for the tax years beginning after July 1, 2029.

Oregon law states that any change in real market value to property due to the installation of a qualifying renewable energy system is exempt from assessment of the property’s value for property tax purposes. Qualifying renewables include solar, geothermal, wind, water, fuel cell or methane gas systems used to heat, cool or generate electricity. This exemption is intended for end users and only applies to systems that are net metered or primarily intended to offset on-site electricity use.  Systems installed on real property that

Although Pennsylvania's December 1996 electricity restructuring law did not establish a clean-energy fund, four renewable and sustainable-energy funding programs were subsequently created through individual settlements with the state’s five major distribution utilities: Metropolitan Edison Company (Met-Ed), Pennsylvania Electric Company (Penelec), PECO Energy (PECO), PP&L (PPL), and Allegheny Power/West Penn Power Company (WPP). These utilities created individual "Sustainable Energy Funds" with the goals of promoting (1) the development and use of renewable energy and advanced clean-energy technologies, (2) energy conservation and efficiency, and (3) sustainable-energy businesses. Each utility has established an oversight board and designated a fund administrator.

The four Sustainable