Solar installation in Montgomery County, MD means designing around three local realities. NEDES builds every Montgomery County system around those constraints from day one, then layers in what Maryland actually offers in 2026. This includes property and sales tax exemptions, an active SREC market, and Pepco net metering at full retail value.
According to NREL’s PVWatts calculator, using TMY3 data from Ronald Reagan Washington National Airport, the area averages approximately 4.6 peak sun hours per day annually. Summer months (June–August) run higher, in the 5.3–5.6 hour range, while December and January typically fall to around 3.0–3.3 hours.
A 9 kW system at 4.6 peak sun hours produces approximately 11,800 kWh per year after standard system losses. That means a correctly sized system can offset most or all of a typical Montgomery County home’s usage.
Pepco has filed three rate actions affecting Montgomery County since 2021: an approved multi-year rate plan in 2021, a second multi-year plan in June 2024, and a new case filed in November 2025 requesting a further increase of up to 23% overall. Locking in your own generation source helps remove the specific portion of that trend from your bill.
The federal Residential Clean Energy Credit (IRC §25D) expired for expenditures made after December 31, 2025, under the One Big Beautiful Bill Act (Public Law 119-21, signed July 4, 2025). A Montgomery County homeowner who buys a system with cash or a loan in 2026 receives no federal tax credit. NEDES offers cash, loan, and lease/PPA financing for Montgomery County homeowners.
Maryland Tax-Property Code § 7-242 classifies solar energy property as exempt from local real property tax assessment. A system that would otherwise add tens of thousands of dollars to your home’s assessed value adds $0 to your annual Montgomery County property tax bill, and the exemption does not expire under current Maryland law.
Maryland exempts qualifying solar energy equipment from the state’s 6% sales and use tax, per Maryland Comptroller guidance. On a $26,000 system (the approximate cost of a 9 kW installation in Maryland in 2026 at the state’s current average of about $2.90 per watt before incentives), that exemption is worth roughly $1,560 in immediate savings.
Every Montgomery County solar system earns one Solar Renewable Energy Certificate (SREC) for every 1,000 kWh it generates. As of 2026, standard Maryland SRECs trade at roughly $40–$45, while newer residential systems under 20 kW that qualify under the state’s Brighter Tomorrow Act (installed between July 2024 and January 2028) earn “Certified BT” SRECs carrying a 1.5x compliance multiplier, trading closer to $57.50.
Montgomery County’s forest conservation law is one of the strictest in the region, and Montgomery Planning (M-NCPPC) reviews larger or ground-mounted solar projects for tree-canopy impact. Separately, homeowners in the county’s many HOA-governed communities are protected by Maryland’s Solar Rights Act, Real Property Code § 2-119
NEDES installs five system types in Montgomery County, each filed as its own permit package through the county’s Department of Permitting Services. The same in-house crew handles design, permitting, and installation for every type. That means you never have to deal with subcontractor handoffs between stages.
We provide solar installation service Maryland with systems sized around 12 months of your actual Pepco billing data.. Montgomery County's mature tree canopy means shading analysis matters more here than in newer-construction counties. We run that analysis, including seasonal sun-angle changes, before we file a permit.
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Commercial systems in Montgomery County move through a different track than residential rooftops. Projects above eSolar's size and complexity limits go through DPS's standard commercial plan review. We design around Pepco's General Service (GS) rate structure, since commercial customers are billed on demand charges as well as usage
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Adding a Level 2 EV charger in Montgomery County is an electrical-permit-only project in most cases. We start by confirming your electrical panel has room for a new 240-volt, 40- to 50-amp circuit; homes with older or already-full panels sometimes need a subpanel or service upgrade before a charger can be added safely.
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If your household's Pepco usage has grown since your original installation, we can expand an existing array rather than starting over. The first step is checking your inverter's remaining capacity and whether your system is already near Maryland's net metering cap of 200% of your baseline annual usage, since that cap determines how much you can add and still get full retail credit for the extra production.
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Roof replacement is the most common reason for a remount in Montgomery County, and it's a project we see often given the county's tree canopy and the age of housing stock in communities like Kensington and Chevy Chase. We remove your panels and racking, store them on-site, and reinstall once your roofer completes the new roof.
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Installation Process
A Montgomery County solar installation moves through the same four stages everywhere, but the local specifics (the permitting portal, the inspection authority, and Pepco’s approval timeline) are county- and utility-specific.
We pull 12 months of Pepco usage history, model your roof for orientation, pitch, and shading, and confirm eligibility for eSolar fast-track permitting before we design a layout.
Montgomery County’s Department of Permitting Services runs eSolar, an automated permitting program launched in 2024 that integrates SolarAPP+ directly into the county’s ePlans review system.
Most residential systems install in one to two days depending on size. Montgomery County requires a post-installation inspection before the system can be energized. We schedule and attend it.
After county inspection sign-off, we submit your Pepco interconnection and Permission to Operate application. Maryland PTO approval typically takes 2 to 4 weeks after final inspection. Once Pepco approves, your net metering account activates.
Coverage
NEDES: The Leading Solar Company
Here’s how we stack up against the two kinds of competitors you’ll run into in Montgomery County: subcontracted local crews sold through lead-generation sites, and installers who compete for your quote through national marketplaces like EnergySage.
| Factor | Other Local Installers | NEDES |
|---|---|---|
| Workmanship warranty | 1–10 years (EnergySage's marketplace standard) | 25 years |
| Response time on service calls | Days to weeks | Under 24 hours |
| Production monitoring | App, sometimes extra cost | Included, real-time |
| Financing options | Cash or loan only | Cash, loan, or lease/PPA |
| Point of contact | Often subcontracted crews | In-house, start to finish |
Our installation team holds NABCEP PV Installation Professional certification. In the last decade, we installed hundreds of solar panels and helped multiple homeowners get completely off the grid. Here’s an overview of our latest testimonials:
How long does Pepco take to approve Permission to Operate in Montgomery County?
Pepco’s Maryland Permission to Operate review typically takes 2 to 4 weeks after your final county inspection, faster than the utility’s DC territory timeline.
What incentives are available for solar in Montgomery County, MD, in 2026?
Maryland’s property tax exemption, the state’s 6% sales tax exemption on solar equipment, the SREC market, Pepco net metering at full retail value, and (for income-qualified households, funding permitting) the Maryland Solar Access Program grant. The federal 30% tax credit expired for homeowner-owned systems on December 31, 2025, and is not currently available.
How many peak sun hours does Montgomery County get annually?
Approximately 4.6 peak sun hours per day on average, based on NREL PVWatts TMY3 data from the nearest long-record station, Reagan National Airport.
Do I need HOA approval to install solar in Montgomery County?
If your community has an HOA, you’ll typically go through its architectural review process for panel placement and appearance. Maryland’s Solar Rights Act (Real Property Code § 2-119) prevents an HOA from banning solar outright or imposing restrictions that substantially raise your cost or cut your system’s output.
How much does a typical solar system cost in Montgomery County?
Maryland’s 2026 average is roughly $2.60–$3.20 per watt before incentives. A 9 kW system (a common size for a Montgomery County home) runs approximately $23,000–$29,000 before Maryland’s tax exemptions and before any SREC income, which accrues over the life of the system rather than at installation.
What is the Maryland SREC program and how much can I earn?
Your system earns one SREC per 1,000 kWh produced, currently worth roughly $40–$45 on the standard market or up to about $57.50 for newer residential systems certified under the Brighter Tomorrow Act. A typical 9 kW Montgomery County system can generate an estimated $470–$680 per year in SREC income.
An NEDES energy consultant reviews your Pepco usage, calculates your actual Montgomery County permit costs, and shows a side-by-side comparison of system sizes, financing options, and realistic payback timelines.