Maryland Solar Incentives and Tax Credits

Maryland offers a layered stack of financial mechanisms—federal, state, and utility-level—that collectively reduce the net cost of solar photovoltaic installations for residential and commercial property owners. This page catalogs each major incentive category, explains how the mechanisms interact, identifies classification boundaries between program types, and surfaces the tradeoffs that influence how much of the theoretical benefit any given installation actually captures. Understanding these programs requires distinguishing between tax credits, rebates, performance payments, and financing instruments, which operate under separate administrative frameworks and eligibility rules.

• Definition and scope
• Core mechanics or structure
• Causal relationships or drivers
• Classification boundaries
• Tradeoffs and tensions
• Common misconceptions
• Checklist or steps (non-advisory)
• Reference table or matrix

Definition and scope

Maryland solar incentives are financial instruments authorized by statute, regulation, or utility tariff that reduce the upfront cost, ongoing cost, or tax liability associated with installing and operating a solar energy system. The term "incentive" encompasses at least four distinct categories: tax credits (reductions in tax owed), exemptions (exclusions from property or sales tax calculation), performance-based payments (compensation tied to kilowatt-hours generated), and rebate or grant programs (direct cash disbursements).

Scope of this page: Coverage is limited to programs available to Maryland residents and businesses under Maryland state law, Maryland Public Service Commission (PSC) tariffs, and federal statutes applicable to Maryland installations. This page does not address incentive structures in neighboring jurisdictions (Virginia, Delaware, Pennsylvania, West Virginia, or Washington D.C.), does not constitute legal or tax advice, and does not cover federal programs outside the Investment Tax Credit (ITC) and Modified Accelerated Cost Recovery System (MACRS) depreciation. Programs targeting specific sectors—such as agricultural installations or low-income households—are introduced here but treated in depth on dedicated pages including Low-Income Solar Programs in Maryland and Agricultural Solar Installations in Maryland.

For a broader orientation to how solar systems function before examining their economics, the conceptual overview of Maryland solar energy systems provides the technical foundation.

Core mechanics or structure

Federal Investment Tax Credit (ITC)

The ITC is authorized under 26 U.S.C. § 48 (commercial) and § 25D (residential) of the Internal Revenue Code, as amended by the Inflation Reduction Act of 2022 (Public Law 117-169). For residential systems placed in service after January 1, 2022, the credit rate is rates that vary by region of eligible system costs, with no dollar cap on system size (U.S. Department of Energy, Office of Energy Efficiency & Renewable Energy). The credit applies to the year the system is placed in service and is non-refundable, meaning it reduces federal tax liability to zero but does not generate a refund. Unused credit carries forward under § 25D(b)(2) rules. See Federal Investment Tax Credit for Maryland Residents for a dedicated treatment.

Maryland Income Tax Credit

Maryland does not currently maintain a standalone state income tax credit specifically for residential solar installations equivalent to the federal ITC. The state's primary income-side benefit operates through the exemption structure rather than a credit mechanism.

Maryland Sales and Use Tax Exemption

Maryland Code, Tax-General Article § 11-230, exempts solar energy equipment from the state's rates that vary by region sales and use tax. This exemption applies to the purchase of photovoltaic panels, inverters, racking hardware, monitoring equipment, and battery storage systems when purchased for installation in Maryland. The exemption reduces upfront system cost by the equivalent of the rates that vary by region rate on eligible equipment.

Maryland Property Tax Exemption

Maryland Code, Tax-Property Article § 9-203, provides a partial property tax exemption for the value added to residential property by a solar or geothermal system. Local assessors are required to exclude the value of qualifying solar equipment from the assessment used to calculate property taxes. Because Maryland's effective average property tax rate is approximately rates that vary by region of assessed value (Lincoln Institute of Land Policy, 50-State Property Tax Comparison), a system adding amounts that vary by jurisdiction to assessed value would otherwise incur roughly amounts that vary by jurisdiction annually in additional property tax—avoided under the exemption.

Maryland Solar Renewable Energy Credits (SRECs)

SRECs are performance-based instruments generated at a rate of 1 SREC per 1,000 kilowatt-hours (kWh) of solar electricity produced. Maryland's Renewable Portfolio Standard (RPS), codified in the Public Utilities Article §§ 7-701 through 7-714, requires electricity suppliers to source a defined percentage of retail load from solar resources or pay a Solar Alternative Compliance Payment (SACP). The SACP rate establishes a price ceiling for SRECs in the Maryland market. SRECs are tracked through the PJM-Environmental Information Services (PJM-EIS) Generation Attribute Tracking System (GATS). For full mechanics, see Maryland Solar Renewable Energy Credits (SRECs).

Net Metering

Under Maryland PSC rules implementing Public Utilities Article § 7-306, net metering allows eligible customers to receive a kilowatt-hour credit on their utility bill for excess solar generation exported to the grid. The credit is applied at the full retail rate for investor-owned utilities including BGE, Pepco, Delmarva Power, and Potomac Edison. Annual net excess generation compensation rules vary by utility tariff. See Maryland Net Metering Explained for rate structures and eligibility details.

Causal relationships or drivers

Maryland's incentive stack exists because solar installations have high upfront capital costs relative to their long-run marginal operating costs. Without intervention, the payback period on a residential system averaging 8–10 kW would exceed the system's 25-year warranty life for a significant share of households, making voluntary adoption economically irrational.

The RPS Solar Carve-Out is the proximate driver of SREC value. The Maryland General Assembly established escalating solar percentage requirements—rising to rates that vary by region of retail load from solar by 2028 under Maryland Code, Public Utilities Article § 7-703—creating mandatory demand for SRECs. When compliance demand exceeds available SREC supply, prices rise. When installations outpace compliance demand, prices compress toward zero, as occurred in the 2013–2017 period before the carve-out was revised.

The federal ITC was extended and increased by the Inflation Reduction Act because Congressional Budget Office scoring showed the credit generated positive net economic and employment effects in domestic manufacturing and installation trades. The rates that vary by region rate is the highest the residential credit has reached since the program's 2006 establishment.

The regulatory context for Maryland solar energy systems explains how PSC oversight and utility tariff structures create the framework within which these incentives operate.

Classification boundaries

Solar incentives classify along two primary axes: when the benefit is received (upfront vs. ongoing) and what the benefit is contingent upon (system existence vs. system performance).

A second classification boundary distinguishes refundable from non-refundable credits. The federal ITC under § 25D is non-refundable for residential filers. Commercial installations qualifying under § 48 may access transferability and direct pay provisions under the Inflation Reduction Act for entities meeting specific criteria, creating a separate classification for tax-exempt and government entities.

A third boundary separates stacked from mutually exclusive incentives. Maryland's incentive programs are largely stackable: a single installation can simultaneously claim the federal ITC, the sales tax exemption, the property tax exemption, and generate SRECs. However, certain grant programs administered by the Maryland Energy Administration (MEA) may require that grant amounts reduce the ITC basis, affecting the effective credit value.

Tradeoffs and tensions

SREC price volatility vs. net metering stability. Net metering delivers a predictable per-kWh credit at the retail rate, while SREC revenue fluctuates with market supply and compliance dynamics. Systems installed during periods of high SREC prices (amounts that vary by jurisdiction–amounts that vary by jurisdiction+/SREC) have experienced revenue compression as the Maryland market added capacity. Owners relying on SREC income for projected payback calculations face basis risk that net metering revenues do not carry.

ITC basis interaction with grants. When a property owner receives a direct cash grant for a solar installation, IRS rules require that the grant amount reduce the eligible cost basis for ITC calculation purposes. A amounts that vary by jurisdiction MEA grant on a amounts that vary by jurisdiction system reduces the ITC-eligible basis to amounts that vary by jurisdiction lowering the rates that vary by region credit from amounts that vary by jurisdiction to amounts that vary by jurisdiction—a amounts that vary by jurisdiction net reduction. The grant is not always worth accepting without this calculation.

Third-party ownership structures and incentive capture. Under a solar lease or PPA, the third-party system owner—not the homeowner—claims the federal ITC and SRECs. Homeowners access lower electricity rates but forfeit the tax credit value. See Maryland Solar Lease vs. Purchase Comparison and Maryland Power Purchase Agreements (PPAs) for structural tradeoffs.

Battery storage integration and MACRS. Pairing a solar battery storage system in Maryland with a PV array can qualify the battery for the ITC if it is charged exclusively from the solar array at least rates that vary by region of the time (IRS Notice 2018-59). A battery charged from the grid does not qualify. The MACRS 5-year recovery schedule for solar assets accelerates depreciation for commercial owners, but only applies to those with tax liability to offset.

Common misconceptions

Misconception: The rates that vary by region ITC applies to the full installed cost including labor and permits.
Correction: The ITC applies to the "total installed cost," which under IRS guidance includes materials, labor, permits, and sales tax on equipment. The IRS explicitly confirmed this scope in its guidance on § 25D. The percentage therefore does apply to labor—a common point of confusion—but only for residential installations meeting § 25D eligibility.

Misconception: Maryland has a state income tax credit equivalent to the federal ITC.
Correction: Maryland does not maintain a percentage-of-cost residential solar income tax credit at the state level. The state incentive stack relies on tax exemptions (sales and property) and performance payments (SRECs), not a state ITC equivalent.

Misconception: Net metering pays cash for excess generation.
Correction: Net metering applies a kilowatt-hour credit to the utility bill, not a cash payment. Annual net excess generation at the end of a 12-month billing cycle under most Maryland utility tariffs is compensated at the utility's avoided cost rate—substantially below retail—or carried forward at retail. See Maryland PSC net metering tariff filings for the applicable utility.

Misconception: SRECs are automatically sold.
Correction: SRECs are generated and tracked in GATS, but the system owner must actively register the system with PJM-EIS and either sell SRECs through a broker, aggregator, or spot market, or contract forward sales. SRECs that are not sold within their validity period (typically 3 years in Maryland) expire without value.

Misconception: The property tax exemption eliminates all property tax increases.
Correction: Maryland Code § 9-203 exempts the value of the solar equipment from assessment. If the installation improves the structure in ways beyond the solar equipment itself—new roofing integrated with the project, for example—those ancillary improvements may remain assessable depending on local assessor determination.

Checklist or steps (non-advisory)

The following sequence describes the steps typically involved in identifying and accessing Maryland solar incentives. It is presented as a reference framework, not professional advice.

1. Verify federal tax liability. The ITC is non-refundable; confirm sufficient federal tax liability in the installation year or anticipate carryforward use under § 25D(b)(2).
2. Confirm system eligibility under § 25D or § 48. Residential vs. commercial ownership determines which IRC section governs and what documentation requirements apply.
3. Obtain Maryland SREC registration through PJM-EIS GATS. System must be registered before SRECs are issued; registration requires inverter production data and interconnection documentation.
4. Verify sales tax exemption applies to the purchase. Confirm with the installer that the rates that vary by region sales tax exemption under Tax-General § 11-230 is applied at point of sale; the exemption is not automatically refunded post-purchase.
5. Review MEA and utility grant availability. Check Maryland Energy Administration program listings for active grant windows; confirm grant-ITC basis interaction before accepting.
6. Review utility net metering tariff. Confirm applicable utility's net metering rules, annual true-up date, and excess generation compensation rate through Maryland PSC-approved tariff schedules.
7. Review property tax exemption filing requirements. Some Maryland counties require a separate application to the local assessor to apply the § 9-203 exemption; confirm requirements with the county assessment office.
8. Document placed-in-service date. The ITC requires the system to be "placed in service" in the tax year the credit is claimed; obtain final inspection sign-off documentation from the permitting and inspection process.
9. Assess MACRS eligibility (commercial/business owners). Confirm 5-year MACRS schedule applies under IRS Rev. Proc. 87-56 and that the asset is placed in service in the correct tax year.
10. File applicable tax forms. IRS Form 5695 (residential ITC), IRS Form 3468 (commercial ITC), Maryland Form 502 or 504 as applicable for state-level adjustments.

For a complete picture of how solar installations proceed from site assessment through interconnection, see Maryland Solar Energy and Property Values and the Maryland Solar Energy Statistics and Market Data reference.

Common misconceptions

(See the dedicated section above.)

Reference table or matrix

Maryland Solar Incentive Comparison Matrix

For foundational context on Maryland solar policy, see the Maryland Renewable Energy Portfolio Standard page and the broader Maryland solar authority home.

References

• [U.S. Department of Energy —