Sales and Use Tax Exemption for Renewable Energy Equipment

March 07, 2023


In April 2008, the Maryland enacted legislation exempting geothermal and solar energy equipment from the state sales and use tax. Geothermal equipment is defined as "equipment that uses ground loop technology to heat and cool a structure". Solar energy equipment is defined as "equipment that uses solar energy to heat or cool a structure, generate electricity to be used in a structure, or provide hot water for use in a structure". Solar energy equipment does not include "equipment that is part of a non-solar energy system or that uses any type of recreational facility or equipment as a storage medium". These distinctions appear to indicate that solar pool heating equipment, and possibly passive solar materials, are not eligible for the exemption.

Two pieces of legislation expanding the sales tax exemption were enacted in May 2009. H.B. 1171 added residential wind energy equipment as eligible for this incentive. Residential wind energy equipment is equipment installed on a residential property that uses wind energy to generate electricity for use in a residential structure on that property. S.B. 621 revised the definition of solar energy equipment to include systems that supply electricity to the grid (e.g., through a net metering agreement). The amendments contained in both laws took effect July 1, 2009.

Program Overview

Implementing Sector: State
Category: Financial Incentive
State: Maryland
Incentive Type: Sales Tax Incentive
Web Site:
Administrator: Comptroller of Maryland
Start Date:
Eligible Renewable/Other Technologies:
  • Solar Water Heat
  • Solar Space Heat
  • Solar Thermal Electric
  • Solar Photovoltaics
  • Geothermal Heat Pumps
  • Wind (Small)
Incentive Amount: 100% exemption
Maximum Incentive: None


Name: Md Code: General Tax §11-230
Date Enacted: 04/24/2008 (subsequently amended)
Effective Date: 07/01/2008


Name: Information Specialist (Sales Tax) - Comptroller of Maryland
Annapolis MD 21411
Phone: (800) 638-2937

This information is sourced from DSIRE; the most comprehensive source of information on incentives and policies that support renewables and energy efficiency in the United States. Established in 1995, DSIRE is operated by the N.C. Clean Energy Technology Center at N.C. State University.