Baltimore County doesn’t have one housing type; it has several, packed close together. NEDES treats those as three different design problems in our Baltimore solar installation services. The experts handle the county’s permitting office and BGE’s interconnection paperwork so you don’t have to learn either system from scratch.
Start with the sun itself. NREL’s PVWatts tool, run against BWI Thurgood Marshall’s long-term weather data (about 15 miles south of Towson, the closest station with a deep enough record to be useful), puts Baltimore County at roughly 4.5 peak sun hours a day on an annual basis. Summer stretches that to 5.2–5.5 hours; the depths of winter can dip to 2.9-3.2.
An 8.4 kW system (a common size for a mid-sized rowhouse or townhome here) nets out to roughly 10,800 kWh of production a year. For comparison, the EIA’s 2024 Maryland electricity profile shows the average household burning through about 929 kWh a month, or 11,150 kWh annually. It is close enough that an 8.4 kW system covers most of a typical bill outright.
It’s the Maryland Office of People’s Counsel’s own finding, based on BGE’s distribution-rate history since the utility’s 2012 acquisition by Exelon. The most recent multi-year rate plan (PSC Order No. 90948) added roughly $4.08 a month to the average residential electric bill in 2024, with a final, smaller step of about $1.07 a month effective January 1, 2026. BGE isn’t slowing down, either: in mid-2026 the utility filed a new case, Docket No. 9888, asking regulators for another $156 million, which would translate to roughly $8 more per month for a typical household.
IRC §25D, the 30% Residential Clean Energy Credit, expired for any system where money changed hands after December 31, 2025. If you’re buying with cash or financing through a loan in 2026, that credit simply isn’t part of the math anymore, no matter what a sales sheet claims. It hasn’t disappeared entirely, though. Homeowners who go the lease or PPA route still benefit indirectly, since the company that owns the system can claim a related commercial credit under Section 48E and typically prices that into a lower monthly payment. NEDES offers cash, loan, and lease/PPA options in Baltimore County.
Two separate exemptions survived the federal changes untouched. First, under Maryland Tax-Property Code § 7-242, a certified solar energy system is excluded from your home’s assessed value for local property tax purposes; install a $25,000 system and your Baltimore County property tax bill doesn’t move. Second, the state’s 6% sales and use tax doesn’t apply to qualifying solar equipment, per Comptroller guidance, which knocks roughly $1,300–$1,700 off an average residential system before any other incentive is factored in.
Every time your system generates 1,000 kWh, Maryland’s SREC market hands you one tradable certificate, registered through PJM-GATS, that utilities buy to satisfy the state’s renewable-energy mandate. Standard SRECs are trading around $40–$45 in 2026. If your system is under 20 kW and went in between July 2024 and January 2028, the Brighter Tomorrow Act bumps that up with a 1.5x “Certified BT” multiplier, pushing the effective price closer to $57.50.
The Maryland Solar Access Program, created under the same 2024 Brighter Tomorrow Act, pays income-qualified households $750 per kilowatt of installed capacity, capped at $7,500. Funding runs in cycles set by the Maryland Energy Administration, and availability has fluctuated through 2026, so the right move is confirming current status and eligibility at the time you apply rather than assuming a figure quoted months ago still holds.
Maryland’s net metering law credits every exported kWh at the full retail rate (not a discounted wholesale rate) and BGE rolls unused credits forward monthly until your personal true-up date, which lands on the anniversary of your interconnection approval rather than a fixed calendar date the way some utilities handle it. Whatever surplus remains at that anniversary settles at BGE’s avoided-cost rate, roughly 5–6 cents per kWh, well below the 17–19 cents you’d earn during the year.
Five system types, five separate permit packages through the county’s Department of Permits, Approvals and Inspections, and one crew that handles all of them start to finish.
Rooftop systems for detached homes, rowhouses, and townhomes alike, each sized off real BGE billing history rather than a generic estimate. Book a free 15-minute consultation session with construction estimators and get direct answers to your queries.
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Commercial systems move through a different track than residential rooftops. Projects above a certain size and complexity go through PAI's standard commercial plan review, and we design around BGE'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 Baltimore County is usually an electrical-permit-only project. 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 BGE 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, since that 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 Baltimore County, and it's a project we see often given the age of housing stock in communities like Towson and Catonsville. We remove your panels and racking, store them on-site, and reinstall once your roofer completes the new roof.
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Fast and Furious Installation
Three separate approvals have to line up before your system can legally turn on: a county building permit, a county electrical permit filed by a licensed master electrician, and BGE’s Permission to Operate. Here’s the order that actually happens.
First, we confirm BGE is your utility by checking a recent bill, since a handful of county addresses sit on other providers. Only after both are settled do we map out which permit path applies.
Baltimore County’s Department of Permits, Approvals and Inspections handles solar exclusively through its own online applicant portal. Solar-specific instant permitting isn’t live here yet, but Maryland’s 2024 Brighter Tomorrow Act and 2026 Utility RELIEF Act both mandate statewide automated, same-day permitting.
Most residential jobs are done in a day or two. Baltimore County requires a pass on final inspection before BGE will move forward with interconnection. The experts schedule it and stay on-site for it.
Once the county signs off, we submit your interconnection application and BGE’s Permission to Operate request. BGE’s own published process puts this at roughly two to four weeks after final inspection in the typical case.
NEDES: The Leading Solar Company
| Features | Other Local Installers | NEDES |
|---|---|---|
| Warranty | Often manufacturer-only | Full manufacturer + workmanship coverage |
| Response Time | Days, in many cases | Within minutes |
| Monitoring | Often an add-on cost | Included, ongoing |
| Financing | Usually one or two options | PPA, residential loan, cash, or lease |
| Point of Contact | Handed off between teams | One dedicated rep, start to finish |
| Product Insurance | Rarely offered | Included, via Align Solar partnership |
$23,400 before-incentive price + Financed via lease
At pre-incentive cost
By combining roof + solar
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Area Coverage
Do Arlington rowhomes and townhomes qualify for solar the same way detached homes do?
Yes. Attached and rowhome properties qualify under the same county rules as detached homes, though roof orientation and shared-wall geometry often shape the system design more than on a standalone house.
Does an HOA or civic association add extra steps beyond the county permit?
It can. Some Arlington HOAs and civic associations require separate design review before installation, on top of the county’s electrical and building permits, so check your HOA rules early in the process.
What is Arlington’s Community Energy Plan, and how does residential solar support it?
Arlington’s Community Energy Plan targets carbon neutrality by 2050, with solar meant to supply half the county’s electricity by then. Every residential system installed counts directly toward that goal
How long does Dominion Energy take to grant Permission to Operate (PTO)?
Timing depends on Virginia SCC interconnection rules and Dominion’s review queue. Our team applies for your net metering interconnection directly with Dominion and handles the paperwork so nothing slows down your PTO.
Is the federal solar tax credit still available in Arlington, VA?
Owned residential solar in Arlington doesn’t get a federal credit since this ended January 1, 2026. Leasing or a PPA can route through a 30% credit if your system is placed in service by December 31, 2027.
Contact our team, discuss your project and benefit from our solar installation services Arlington County, VA!