Electrician-led solar company in Great Falls
Solar Panel Installation in Great Falls, VA
Great Falls has the biggest lots, the biggest roofs, and the heaviest tree canopy in Fairfax County, so a Great Falls solar design starts with a shade analysis and a 400A service. AJ Long Electric installs the array, the panel, the battery, and the EV charger as one job, with a master electrician on site.
A master electrician is on site for every solar project. $2.40–$2.85/W installed, cash. We run the shade analysis before we quote, design around your 400A service, and size the battery to the well pump.
Content reviewed 2026-09-05
Google reviews
1,463 across four profiles
Family-owned
Since 1996
Licensed and insured
VA 2705031092
On every install
Master electrician on site
Backed by
Workmanship warranty
Cost
What solar costs in Great Falls
A typical 8 to 12 kW rooftop system installs for $19,000–$34,000 cash, which is $2.40–$2.85/W. These are cash installed prices for modules, racking, inverter, and interconnection labor. Two things keep the number down: no commissioned sales team and no subcontracted electrical.
A Great Falls array is often 10 to 12 kW on a clear plane, priced inside the published band. The shade analysis decides the module count, and a ground mount is itemized when the roof cannot make the number. Two panels on a 400A service rarely need upgrading. Any tree work is quoted by an arborist, not hidden in the array price.
| System size | Typical annual production | Installed price, cash |
|---|---|---|
| 8 kW | About 10,000 kWh | $19,200–$22,800 |
| 10 kW | About 12,500 kWh | $24,000–$28,500 |
| 12 kW | About 15,000 kWh | $28,800–$34,200 |
Production assumes about 1,250 kWh per kW per year for a typical Northern Virginia roof. Your bill and your roof set the real number.
Incentives
Great Falls solar incentives in 2026
The federal residential credit does not apply to systems installed after December 31, 2025. What is left for a Great Falls address is built into the proposal, and the full list with sources is in our Fairfax County incentives guide.
Fairfax County waives the residential solar permit fee for a Great Falls address and exempts the equipment from property tax for five years after the inspection passes.
Net metering credits every kilowatt-hour a Great Falls array sends back at the retail rate, and the SRECs stay yours under the State Corporation Commission order of April 30, 2026.
Dominion's Virtual Power Plant pilot launches in 2026 and pays enrolled home batteries for helping the grid during peak events, which matters in Great Falls where a battery is usually part of the design.
Why an electrician
Why Great Falls homeowners choose an electrician for solar
A Great Falls home is an electrical system with a well pump, a 400A service, two panels, and a generator inlet somebody added in 2012. Designing solar and a battery into that is electrical engineering on a ladder, and a master electrician is on site to do it.
Fairfax County has inspected our service and panel work in Great Falls for decades. The line-side tap, the transfer equipment, and the backed-up-load panel are the details the inspector looks at, and they are our daily work.
The price is a cash installed number with no commissioned sales team inside it. The battery, the chargers, the ground mount when the roof is shaded, and any panel work are itemized on one proposal.
Solar makes sense in Great Falls when
- Your Great Falls home has at least one large roof plane clear of the oaks from late morning on, and a bill that a 10 to 12 kW array can offset.
- You are on a well and a septic system and want the battery designed to keep the well pump and the refrigerator running through the outages that hit Great Falls first.
- Your 400A service has two panels and you want the array, the chargers, and the battery designed on one load calculation.
Great Falls neighborhoods we serve
From the village center out along Georgetown Pike and Walker Road.
Google reviews
What Great Falls homeowners say
Google reviews from service upgrade and generator hookup jobs in Great Falls and McLean. Solar reviews land here as installs finish.
AJ Long electric was great from start to finish. The owner who came and quoted my panel upgrade, EV charger install, and grounding install was very thorough and answered any and every question I had. Their quote was reasonably priced, and I felt comfortable.
Upgraded my fuse box and installed an EV charger wtih an additional 110 outlet. Solid estimate, timely response, excellent work. Very efficient and knowledgeable, making useful recommendations without trying to "upsell". I definitely recommend and will use them again.
They were upfront a honest with me during the troubleshooting & estimate process. When they did the actual "heavy up" and bringing our house up to code, their work was great. Professional service, I highly recommend them. We already have other projects we will be hiring them for.
Great Falls solar questions
Do the trees in Great Falls rule out solar?
Not on most lots. Great Falls has heavy canopy, but the homes sit on acre lots with at least one roof plane that clears the trees from late morning on. We run a shade analysis on every Great Falls site visit and quote only the modules that produce, so the number on the proposal is the number the roof can make. When the roof is fully shaded, a ground mount in a clear part of the lot is the honest answer, and we say so.
Can a battery keep a Great Falls well pump running in an outage?
Yes, and it is the reason most Great Falls homeowners add one. A standard grid-tied array shuts off in an outage. Add a battery and transfer equipment and the circuits you choose stay on, with the well pump, the refrigerator, the internet, and a few lights at the top of the list. The array charges the battery while the grid is down, and we size the battery to the pump's starting load.
Where does solar connect on a Great Falls 400A service?
On the panel with busbar room and the loads that make sense, or at the service through a line-side tap. It is a design decision that changes the inverter location and the conduit run, and we settle it on the site visit and draw it on the permit set.
Is Great Falls in Fairfax County for permits?
Yes. Great Falls is unincorporated Fairfax County. Land Development Services issues the residential solar permit, waives the fee, and sends the inspector. There is no town review.
We handle this for you
Permits and Dominion in Great Falls
Great Falls is trees, wells, and big services. Here is how we handle a Great Falls address.
- 01
Great Falls is unincorporated Fairfax County, so Land Development Services issues the residential solar permit and waives the fee. There is no town office and no second review outside the few subdivisions with covenants.
- 02
Great Falls addresses are Dominion Energy Virginia. Many Great Falls homes run 400A services with two panels and a well pump, so the interconnection point and the backup circuits are design decisions we make on the site visit.
- 03
The tree canopy in Great Falls is heavy. We run a shade analysis before quoting, and the module count on the proposal is the count that actually produces, not the count that fits.
We handle this for you
The offices and programs
Click through for the official pages. We do the filing, the scheduling, and the follow-up.
Continue the plan
Connect the local and electrical decisions
Review the regional offer, combined solar-and-battery design, or the existing electrical service-area context for Great Falls.
Next step
Start with your bill and your address
Send a recent electric bill and the address. A preliminary system size and price range comes back first, then a site visit with a master electrician turns it into a written proposal.
Solar energy company
AJ Long Electric Solar
AJ Long Electric
7138 Little River Turnpike #305
Annandale, VA 22003
Serving Annandale, Fairfax County, and Northern Virginia.