Charles County answers to SMECO, not to shareholders. NEDES builds every Charles County system around that cooperative structure from the start, then adds what Maryland offers homeowners heading into 2026. This includes property and sales tax exemptions, a live SREC market, and net metering credited at full retail rate.
TMY3 data from the weather station nearest Andrews Air Force Base puts Charles County at approximately 4.4 peak sun hours per day on an annual basis. Summer months push into the 5.1–5.4 hour range, while the shortest days of December and January typically settle around 2.9–3.2 hours.
A 9 kW system running at 4.4 peak sun hours produces roughly 11,550 kWh per year once standard system losses are factored in. For most Charles County households, that’s enough to offset the majority of annual usage, and often all of it on the county’s larger rural rooflines south of Waldorf.
Southern Maryland Electric Cooperative is member-owned, not investor-owned, which puts it in a different category than Pepco or BGE. SMECO has no shareholders demanding a return, and its rates are set to cover the cost of delivering power, not to generate profit. Its Price to Compare sat at roughly 12.2 cents per kWh as of mid-2026. That’s genuinely lower than what Pepco or BGE customers pay elsewhere in the state, which changes the payback conversation: solar here isn’t a defense against runaway rate hikes so much as a hedge against a rate structure that can still shift with regional fuel costs, even without a profit motive behind it.
The federal Residential Clean Energy Credit under Section 25D expired for any system placed in service after December 31, 2025, terminated by the One Big Beautiful Bill Act (Public Law 119-21, signed July 4, 2025). A Charles County homeowner paying cash or financing with a loan in 2026 gets no federal credit on that purchase. A lease or PPA is the one structure that still reaches the 30% figure, indirectly, through the system owner’s commercial Section 48E claim. NEDES offers cash, loan, and lease/PPA financing, and walks through what each actually nets out to for a Charles County property.
Maryland Tax-Property Article § 7-242 exempts solar energy equipment from local real property tax assessment, statewide, automatically. A system that would otherwise add meaningfully to your home’s assessed value adds $0 to your Charles County property tax bill, for as long as you own the system, with no application or renewal required under current law.
Maryland exempts qualifying solar equipment from its 6% state sales and use tax. On a $26,000 system (close to the state’s current average for a 9 kW installation at roughly $2.90 per watt before incentives), that exemption is worth about $1,560 that never shows up on the invoice in the first place.
Every megawatt-hour a Charles County system produces earns one Solar Renewable Energy Certificate, tracked through PJM’s GATS registry and sold on the open market. Standard Maryland SRECs currently trade in roughly the $60–$90 range, moving with supply and compliance demand. Systems under 20 kW certified under the state’s Brighter Tomorrow Act can qualify for a premium “Certified BT” category carrying a 1.5x multiplier. This income only accrues to the system owner.
Net metering in Maryland is governed by Public Utilities Article § 7-306, crediting exported solar power at full retail rate for systems up to 2 MW. SMECO handles interconnection applications through its online PowerClerk system. SMECO’s own reporting shows the program working at real scale: in April 2026, the average true-up credit paid to residential customers with excess generation was $58.79, across 4,131 residential accounts, out of more than 9,409 total net-metered customers as of April 1, 2026.
NEDES installs six system types in Charles County, each filed as its own permit package through the county’s Department of Planning and Growth Management. The same in-house crew handles design, permitting, and installation for every type for homeowners and project managers.
We size every system against 12 months of actual SMECO billing data. Charles County's larger average lot sizes, especially south of Waldorf, often support bigger arrays than tighter suburban lots closer to the Beltway allow.
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Commercial systems move through standard commercial plan review with the county, separate from residential rooftop applications. We design around SMECO's commercial rate structure and preserve access to the 30% Section 48E federal credit, which remains in effect for commercial systems through 2027.
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Adding a Level 2 charger is usually an electrical-permit-only project. We confirm your panel has room for a dedicated 240-volt, 40- to 50-amp circuit before scheduling anything.
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If your SMECO usage has grown since your original installation, we can often expand an existing array. We check your inverter's remaining capacity and how close your system already sits to Maryland's net metering cap of 200% of baseline annual usage.
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Roof replacement is the most common reason for a remount here. We remove your panels and racking, store them on-site, and reinstall once your roofer finishes, without disturbing the existing warranty.
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Fast and Furious Installation
A Charles County solar installation moves through the same four stages everywhere, but the permitting authority, the interconnection system, and the local utility timeline are specific to this territory.
We pull 12 months of SMECO usage history, model your roof for orientation, pitch, and shading, and confirm your system’s expected offset before we design a layout.
Charles County’s Department of Planning and Growth Management, through its Codes, Permits, and Inspection Services division in La Plata, reviews and issues both the building and electrical permits your installation requires.
Most residential systems install in one to two days depending on size. Charles County requires a post-installation inspection before the system can be energized. We schedule and attend it.
After county sign-off, we submit your interconnection application through SMECO’s PowerClerk portal. Once approved, your net metering account activates, and your system starts earning full retail credit and building toward your first SREC payout.
NEDES: The Leading Solar Company
| FACTOR | OTHER LOCAL INSTALLERS | NEDES |
|---|---|---|
| Workmanship warranty | 1–10 years (EnergySage 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 |
| Services systems it didn't install | Rarely, or refuses outright | Yes |
| Point of contact | Often subcontracted crews | In-house, start to finish |
Every project below is a completed, real Maryland installation. We’ve labeled each by its actual city rather than folding it into a generic “Charles County” caption.
installed 2025
installed 2025
farm property
Customer Reviews
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:
Area Coverage
How does SMECO’s net metering true-up work, and when does it happen?
SMECO credits any leftover generation balance once a year, each April, at full retail value. In April 2026, the average residential credit was $58.79 across 4,131 accounts with excess generation, out of more than 9,409 total net-metered customers.
Is SMECO’s interconnection process different from an investor-owned utility like Pepco or BGE?
The underlying net metering law is the same statewide, but SMECO is a nonprofit cooperative, not a shareholder-owned utility. Interconnection applications go through SMECO’s own PowerClerk system rather than a different portal used by an investor-owned company.
Does the federal tax credit still apply to solar in Charles County?
Not for a cash or loan purchase; Section 25D expired for any system placed in service after December 31, 2025. A lease or PPA can still reach the 30% credit, but only through the system owner’s commercial Section 48E claim, not a direct homeowner deduction.
Can I still sell SRECs if I lease my system instead of buying it?
No. SREC income belongs to whoever owns the system. A homeowner who leases forfeits that income to the lease provider. It is a meaningful factor when comparing ownership against a lease’s lower upfront cost.
Is solar viable for rural or agricultural properties in Charles County?
Often, yes. Farm and rural commercial properties can combine the 30% federal Section 48E credit with the USDA’s REAP Grant. Given how much working land remains in the county’s rural south, this is worth a dedicated conversation rather than a standard residential quote.
NEDES energy consultant reviews your SMECO usage, calculates your actual Charles County permit costs, and shows a side-by-side comparison of system sizes, financing options, and realistic payback timelines. Click and consult with an expert for free!
