Fairfax County’s mature tree canopy, HOA-governed neighborhoods, and Dominion Energy’s tiered rate structure make solar more complex here than anywhere else in Northern Virginia. NEDES, providing solar installation Fairfax County, is built for exactly that, pairing local expertise with the federal 30% Investment Tax Credit and local net metering laws to deliver systems that perform, save, and last.
NREL’s PVWatts Calculator, using TMY3 data for Dulles International Airport (12 miles from central Fairfax County), places the county at 4.4 peak sun hours per day averaged annually, above the 4.0-hour national viability threshold. Summer months (June–August) deliver 5.2–5.5 peak sun hours. And December, the lowest month, averages 3.1 hours, which is still enough for daily net-positive production. A 9 kW system at 4.4 hours produces approximately 13,200 kWh per year. The EIA’s 2022 State Electricity Profile for Virginia reports average household consumption of 13,020 kWh annually. This shows that going solar can increase your savings.
Dominion Energy filed for residential rate increases in 2019, 2021, and 2023. The EIA reports Virginia’s average residential electricity rate rose from 10.5¢/kWh in 2013 to 12.4¢/kWh in 2023, an 18% increase over one decade. With solar, you can lock in generation cost for 25 years at the cost of manufacture, not the cost of utility delivery.
The Inflation Reduction Act of 2022 (Pub. L. 117-169) extended the federal ITC at 30% through December 2032. On a $27,000 Fairfax County system, that is $8,100 applied directly to federal income tax liability in the installation year. The credit reduces to 26% in 2033 and 22% in 2034. Owners, not lessees, claim it via IRS Form 5695.
VA Code § 58.1-3661 classifies certified solar energy equipment as exempt from local property taxation. A $27,000 system increases Fairfax County’s annual property tax assessment by $0. Remember that the exemption applies to both residential and commercial installations and does not expire under current Virginia law. Yes, you can benefit from it in 2026.
Virginia Code § 58.1-609.10 exempts solar energy equipment purchases from the state’s 4.3% sales and use tax. On a $27,000 pre-ITC system, that is $1,161 in immediate savings, compounded on top of and independent from the federal credit. It means you do not have to pay state sales tax on the hardware and installation of the solar system.
Virginia Code § 56-594 requires Dominion Energy to credit Fairfax County solar owners for every kWh exported to the grid at the full retail rate. Credits roll forward monthly. Annual true-up occurs each March. Systems may be sized up to 150% of the prior 12-month average consumption. At the current rate, a 900 kWh annual surplus generates approximately $112 in March credits.
Fairfax County’s Community-wide Energy and Climate Action Plan (CECAP), adopted in December 2021, targets county-wide net zero emissions by 2050. The plan identifies residential solar as a primary electrification pathway. County-commissioned GIS analysis identified 85,000+ regional rooftops as technically suitable for solar installation in Fairfax County. Installations filed before 2030 qualify for the earliest phases of potential county-level incentive programs as those develop.
Our Fairfax County solar installation company installs 5 system types, each requiring separate permit packages from local LDS (Land Development Services). The same licensed crew handles every stage, which means no subcontractor handoffs between design, permitting, and installation
Your roof, your data, your savings. Our team sizes every system against 12 months of your Dominion Energy bills, no guesswork. South-facing roofs at 15–35° pitch deliver peak Northern Virginia output. Whether your Fairfax County home has rail-mount, flush-mount, or standoff racking, we run structural load calculations before a single permit is filed.
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Dominion's demand charges hit hard above 25 kW, and solar hits back harder. Our team has deployed commercial solar installation Fairfax County, from 40 kW office rooftops to 168 kW warehouse installations, navigating county commercial permits and Dominion's Schedule GS and TOU interconnection agreements. This ensures your ROI timeline stays on track.
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Charge smarter, not just cheaper. NREL's 2023 Futures Study shows rooftop solar cuts per-mile EV energy costs by 58–63% versus Virginia grid rates. Our solar panel installation team integrates Level 2 (240V, 48A) chargers directly into your solar design, one site visit, one panel evaluation, one permit.
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More panels, smarter inverters, more savings. Whether you're adding capacity or switching from a string inverter to microinverters for shaded or multi-pitch roofs, NEDES handles everything: updated single-line diagrams for Dominion Energy's interconnection review, Fairfax County permit amendments, and a seamless tie-in to your existing system.
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Roof replacement under an active solar array requires full panel and racking removal. Experts at our solar panel installation company coordinate directly with the project owners, handling structural detachment, safe storage, and reinstallation to the original tilt and azimuth specs.
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Installation Process
Fairfax County solar installation requires three sequential approvals before a system can operate: a county building permit, a post-installation county inspection, and Dominion Energy’s Permission to Operate. Our experts manage all three. See our complete process below!
We pull 12 months of Dominion Energy usage data, satellite-map your roof for orientation, pitch, and shading, and confirm service territory eligibility. Our experts then identify panel locations, calculate roof load, evaluate your electrical panel for inverter compatibility, and engineer a layout specific to your roof geometry.
Next, we file both the building permit and electrical permit at the same time via Fairfax County’s PermitFairfax online portal, cutting wait time significantly. All county permit fees are covered by us and itemized in your contract; no hidden costs, no action required from you.
A standard 8–11 kW system installs in one day; larger systems take two. All roof penetrations are flashed and sealed per Virginia Uniform Statewide Building Code requirements. Fairfax County’s Building Inspection Division conducts a mandatory post-installation inspection before the system powers on; we schedule and attend it for you.
After county inspection approval, we submit your Dominion Energy Permission to Operate application. Upon PTO approval, we activate your monitoring portal, confirm inverter production, and walk you through your real-time dashboard. Your Dominion net metering account activates automatically; no additional steps needed on your end.
Coverage
NEDES: The Leading Solar Company
| Factor | Other Local Installers | NEDES |
|---|---|---|
| Workmanship warranty | 5–10 years | 25 years |
| Response time on service calls | Days to weeks | Under 48 hours |
| Production monitoring | App, sometimes extra cost | Included, real-time |
| Financing options | Limited | Cash, loan, or lease |
| Point of contact | Often outsourced crews | In-house, start to finish |
$27,840 before 30% federal credit
This south-facing rooftop system produces 14,200 kWh yearly against a 13,400 kWh household need, covering 88% of the bill through Dominion net metering. After the 30% federal tax credit reduces the $27,840 install cost to $19,488, the homeowner saves $1,760 annually on electricity at current Dominion rates.
At pre-incentive cost
This office rooftop system directly targets Dominion Schedule GS demand charges, which make up 31% of the facility’s total electricity spend. By generating power during the 10 AM–4 PM billing window, it cuts peak-draw costs. Combined with 30% ITC and MACRS 5-year depreciation, payback lands at 6.2 years.
By combining roof + solar
This 1978 home needed a new roof before solar could be installed. By bundling both under one Fairfax County permit, the homeowner secured a single 25-year warranty covering shingles and panels together. The combined approach avoided the premium of post-solar roof replacement, saving an estimated $4,200–$6,800 in future costs.
Real Stories Of Solar Success
Discover how we have helped families and business acorss Virginia, Pennsylvania, and Texas achieve absolute energy independence at a fraction of the solar costs.
How long does a residential PTO application from Dominion take?
Dominion processes residential PTO applications in 5–15 business days under Virginia SCC interconnection rules.
Will my Dominion Energy bill reach zero after solar installation in Fairfax County?
Most Fairfax County systems reduce the Dominion bill to $8–$20 per month, the fixed monthly customer charge Dominion applies regardless of consumption. That charge is currently $7.58/month for residential accounts.
What happens at night or on cloudy days?
Your home pulls from the utility grid automatically, or from a battery if you have one installed. You stay connected to power at all times.
What’s actually covered under the warranty?
Equipment is covered by manufacturer warranties of up to 25 years, and NEDES backs its own installation work with a 25-year workmanship warranty covering roof penetrations, wiring, and mounting hardware.
Do you guarantee how much energy my system will produce?
Every design done by our team includes a production estimate based on your roof, shading, and local weather data, and the equipment carries manufacturer performance guarantees. If a system underperforms that estimate for reasons within our control, we’ll make it right.
At NEDES, an energy consultant reviews your Dominion Energy usage, calculates local permit costs, and shows a side-by-side comparison of system sizes, financing options, and payback timelines before you commit to anything. Call us now!