The EvoGen Solar blog
Solar answers for Washington, DC homeowners
Most solar questions in DC come down to credits, roofs and paperwork. These articles answer them plainly, with the 2026 figures and links to where each number comes from.
The blog at a glance
- Articles
- 11
- Written by
- Orville Merriweather
- Topics
- Credits, roofs, batteries, upkeep
- Updated
- October 2026
Short answer
This blog covers solar in Washington, DC in plain language: what DC SRECs pay, what solar costs after the federal homeowner credit ended, how rowhouse roofs and historic districts shape a layout, when a battery makes sense, how to charge an EV from the roof, and what to check when production drops.
Credits and money
What solar pays in DC, and what changed in 2026
The District's credits and net metering carry most of the value of a DC system. These articles cover what a credit sells for, what a fair price looks like now that the federal homeowner credit has ended, and how the rules change across the Maryland and Virginia lines.
DC SRECs in 2026: What a Credit Pays and How to File
What a DC SREC sells for now, how certification works, and why an unregistered system leaves money on the roof.
Pricing a Solar System in Washington, DC This Year
Price per watt in DC, what pushes a quote up, and how SRECs change the payback after the federal credit.
Life After 25D: Solar Economics in DC Now
The homeowner credit ended in 2026. Why solar in the District still pays, and what to check first.
Crossing the District Line: DC, MD and VA Incentives
DC, Maryland and Virginia credit solar very differently. A side by side look at 2026.
Roofs and permits
Rowhouse roofs, historic review and reroofing
Most DC jobs start on a flat roof behind a parapet, and many sit inside a historic district. These articles walk through layouts, preservation review and what happens when the roof under an array needs replacing.
Rowhouse Roofs and Solar: Parapets, Hatches, Drains
Parapets, hatches, party walls and drains: what a flat rowhouse roof means for a solar layout.
Going Solar Inside a DC Historic District
Who reviews solar in DC's historic districts, which layouts move fastest, and what the package needs.
New Roof Under Old Panels: Planning the Order
Reroofing under an existing array: who does what, in what order, and what it costs.
Batteries and charging
Backup power and electric cars
Full retail net metering changes how batteries and EV chargers fit with solar in the District. Here is when a battery earns its place and how to charge a car from the roof.
Battery or No Battery? How DC Net Metering Decides
Full retail net metering changes the battery question in DC. Here is when one earns its place.
Charging an EV From Rooftop Solar in DC
How to charge an EV from rooftop solar in DC, and what the panel and charger need.
Keeping it running
Low output and unwanted guests
A system that quietly underperforms loses credits every month. These articles cover what to check first and how to keep pigeons out from under the panels.
Production Dropped? Twelve Things to Check
Twelve checks, from the breaker to the shade, before you pay anyone to fix low production.
Pigeons Nesting Under Panels: What Works
Why pigeons love rooftop arrays, what actually keeps them out, and what does not.
About the writing
How these articles are kept honest
Each article is written and kept current by Orville Merriweather, Solar Guides Editor. Numbers come from published sources such as the District's credit market data, utility and regulator filings and state incentive summaries, and every article lists its sources at the end. When a figure changes, the article is updated rather than left to age. More about how we work.
Straight answers
About the blog
Orville Merriweather, our Solar Guides Editor, writes and updates them using figures published by regulators, utilities and market sources, which are linked at the end of every article.
Every article was reviewed in October 2026. Credit prices, rebates and net metering rules change, so call before relying on a number for a decision.
Yes. Call (202) 978-0232; the line is answered 24 hours a day, and a short call often settles what an article cannot.
Tell us what you want the system to do
Give us the address and the goal: lower bills, backup power, an EV charger or a fix. We will say plainly whether it fits and what the job involves.
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