Washington, DC solar decisions
Solar Companies in Washington, DC: A Quote-First Comparison
There is no honest universal “best” installer. The useful comparison is which verified Washington, DC contractor gives this property the clearest design, cash price, production case and service responsibility.
Updated September 12, 2026 · California Rate Relief is a private solar referral service.
How this comparison works
California Rate Relief does not rank a company because it bought placement or because a brand has many reviews. Verify the contracting entity, normalize at least two written quotes, check who performs and services the work, and compare cash economics before financing.
1. Verify the business that signs the contract
Verify the contracting business through the DC Department of Licensing and Consumer Protection. Residential contractors need the applicable contractor license, and DC requires home-improvement contractors and general contractors doing residential work to maintain a licensed home-improvement salesperson.
Record the legal business name and license number shown on the contract. Confirm insurance, who pulls permits, whether installation is in-house or subcontracted, and who handles a warranty claim after the sale.
2. Compare the same system and bill
Require each company to use the same usage history, roof area and backup goal. For customers of Pepco, the proposal should identify the serving utility and explain imports, exports, fixed charges and the estimated bill that remains.
DC’s Department of Energy and Environment treats rooftop solar and community solar as different paths. A renter, condo resident or homeowner whose roof is unsuitable may be able to consider a community subscription, which does not install equipment on the home. Compare its subscription contract separately from a rooftop proposal.
Put the quotes on the same basis
A smaller monthly payment can hide a longer contract, less equipment or a larger remaining electric bill. Ask each bidder to fill the same gaps.
| Compare | Get it in writing |
|---|---|
| System and output | Same DC system size, module/inverter models and roof layout; monthly production with shading and losses shown. |
| Battery and backup | Usable kWh, continuous output, backed-up circuits, reserve setting and expected replacement costs. |
| Price and scope | Separate solar, battery, roof, panel upgrade, permits and interconnection. Compare cash prices before financing. |
| Utility bill | Same usage history and tariff; separate onsite use, grid imports, export credits and remaining fixed/delivery charges. |
| Contract and service | Who installs and who services it; written coverage by address, insurance, license record, exclusions and warranty claim process. |
| Payment and transfer | Cash, loan, lease or PPA; upfront costs, APR or escalator, total payments, home-sale and end-of-term terms. |
3. Read the payment and transfer terms
Compare the cash price even if you expect to finance. For a loan, record the APR, fees, term and total payments. For a lease or power-purchase agreement, record the starting payment, escalator, purchase options, end-of-term terms and home-sale process. Do not compare only the first monthly payment.
4. Put state-specific promises in writing
Put roof access, structural and electrical work, permits, Pepco interconnection, equipment, payment schedule, timeline and change-order rules in the written contract. Treat any “free solar” or guaranteed-savings statement as a claim that must be documented.
Reject verbal promises that do not appear in the contract. Savings, tax, incentive and production claims need the assumptions and responsible party stated clearly.
Confirm the property path
For a rowhouse, condominium or shared building, establish roof ownership, association or co-owner authority, usable area, shade, equipment location and safe installer access before treating a production estimate as viable.
Our decision rule
A stronger quote is complete enough to audit: it identifies the equipment, system size, cash price, production estimate, utility assumptions, roof and electrical scope, installer, service process and contract exits. Use the Washington, DC cost guide to calculate the comparable price per watt before choosing.
Want to discuss your solar options?
Send your project details to California Rate Relief. We collect the information for a solar referral; the provider confirms availability, design and price. The calculator and checklist are yours to use without submitting.