Delaware solar companies
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Trinity Solar
Wall, NJ · serves Delaware from its Hanover, MD office · solar since 2004
EcoGen rating · 60/100Google 4.5 ★ (1,823 reviews)- Workmanship
- 10 years on labor for upfront purchases; the homepage says “up to” 25 years on parts and labor
- Roof penetrations
- 5 years, for upfront purchases
- Batteries
- Tesla Powerwall
- Ways to pay
- Cash, loan, lease and PPA (lease and PPA availability varies by state, per Trinity)
- Solar since
- 2004
Phone: (410) 571-4488Website: trinitysolar.com
View Trinity Solar profileHow this rating adds up
- Licensing15/30
- Warranty protection20/35
- Local presence5/15
- Track record10/10
- Options10/10
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Clean Energy USA
Rehoboth Beach, DE · solar since 2007
EcoGen rating · 56/100Google 4.9 ★ (161 reviews)- Workmanship
- 10 years, its own warranty, per its commercial solar FAQ; its home solar pages give no workmanship term
- Roof penetrations
- Not published
- Batteries
- Battery backup offered (brands not published)
- Ways to pay
- Points to state-backed Green Grant Delaware loans and the LMI program; no company loan, lease or PPA listed
- Solar since
- 2007
Rehoboth Beach headquarters: 20184 Phillips St, Rehoboth Beach, DE 19971 DirectionsPhone: (302) 227-1337Website: ceusa.com
View Clean Energy USA profileHow this rating adds up
- Licensing15/30
- Warranty protection10/35
- Local presence15/15
- Track record10/10
- Options6/10
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Lumina Solar
Halethorpe, MD · Newark, DE office · solar since 2018
EcoGen rating · 49/100Google 4.9 ★ (844 reviews)- Workmanship
- Not published for Delaware; a lifetime warranty is advertised only for Maryland purchases
- Roof penetrations
- Not published
- Batteries
- Battery storage offered as an add-on (brands not published)
- Ways to pay
- Cash, loan and lease (lease through IGS)
- Solar since
- 2018
Newark office: 200 Continental Dr, Suite 401, Newark, DE 19713 DirectionsPhone: (800) 971-6118Website: luminasolar.com
View Lumina Solar profileHow this rating adds up
- Licensing20/30
- Warranty protection0/35
- Local presence15/15
- Track record4/10
- Options10/10
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CMI Solar & Electric
Newark, DE · electrical contractor since 1998
EcoGen rating · 46/100Google 4.3 ★ (11 reviews)- Workmanship
- Not published
- Roof penetrations
- Not published
- Batteries
- Not published
- Ways to pay
- Points to Energize Delaware loans and grants (terms set by the programs, not CMI)
- Solar since
- Not published (electrical work since 1998)
Newark headquarters: 83A Albe Drive, Newark, DE 19702 DirectionsPhone: (302) 731-5556Website: cmielectric.com
View CMI Solar & Electric profileHow this rating adds up
- Licensing30/30
- Warranty protection0/35
- Local presence15/15
- Track record0/10
- Options1/10
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Solar States
Philadelphia, PA · no Delaware office published · solar since 2008
EcoGen rating · 40/100Google 4.8 ★ (141 reviews)- Workmanship
- 10 years for battery systems; the term for solar alone is not published
- Roof penetrations
- Not published
- Batteries
- Tesla Powerwall
- Ways to pay
- Cash, a $0-down lease and a discounted ownership plan
- Solar since
- 2008
Website: solar-states.com
View Solar States profileHow this rating adds up
- Licensing15/30
- Warranty protection0/35
- Local presence5/15
- Track record10/10
- Options10/10
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EMT Solar & Roofing
Cherry Hill, NJ · no Delaware office published · founded 2018
EcoGen rating · 39/100Google 4.9 ★ (1,395 reviews)- Workmanship
- 5 years (company labor warranty)
- Roof penetrations
- Not published
- Batteries
- Batteries offered (brands not published)
- Ways to pay
- Cash, loan, lease and PPA
- Solar since
- 2018 (company)
Phone: (866) 305-2952Website: emtsolar.com
View EMT Solar & Roofing profileHow this rating adds up
- Licensing15/30
- Warranty protection5/35
- Local presence5/15
- Track record4/10
- Options10/10
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Fusion Solar Energy
Edison, NJ · Dover, DE office · founded 2018
EcoGen rating · 39/100Google 4.5 ★ (59 reviews)- Workmanship
- Not published
- Roof penetrations
- Not published
- Batteries
- Battery storage offered (brands not published)
- Ways to pay
- Not published (it says it works with large solar finance companies)
- Solar since
- 2018 (company)
Dover office: 4164 N. DuPont Highway, Suite 8, Dover, DE DirectionsPhone: (848) 315-9390Website: fusionsolarenergy.org
View Fusion Solar Energy profileHow this rating adds up
- Licensing15/30
- Warranty protection0/35
- Local presence15/15
- Track record4/10
- Options5/10
Request Delaware solar quotes
Ready to compare Delaware prices?
Enter your ZIP code to ask solar providers that serve your area for quotes. Compare each quote with the checklist below.
Solar providers that serve your area may contact you, and they pay EcoGen for the introduction. Providers can include installers, solar marketplaces and lead exchanges, and more than one may contact you. How we make money.
Need to know
- We rated 7 Delaware solar companies on licensing, warranties, local presence, track record and options. The top three: Trinity Solar (4, Very good), Clean Energy USA (3.5, Good) and Lumina Solar (3.5, Good).
- Every Delaware utility credits extra power 1-to-1 in kWh for home systems up to 25 kW. Unused credits now carry into the next year by law, and utilities have until December 1, 2026 to update billing. Delmarva's own tariff still forfeited leftover credits when we read it on October 16, 2026.
- Delaware has no home improvement license. Check the company’s Department of Labor contractor registration and its Division of Revenue license, and ask for the Delaware electrician who connects your system.
What solar costs in Delaware
No federal credit for systems you own finished after December 31, 2025. Delmarva customers who buy can get a state grant of $0.80 per watt, up to $10,000 and half the cost. Batteries and roof work cost extra. Compare each quote’s price per watt with these numbers.
Source: EcoGen Solar Cost Index, September 2026 Edition, prices as of September 25, 2026. Full breakdown: Delaware solar panel prices.
Solar incentives, tax breaks and rebates in Delaware
- Net metering
- Extra power is credited 1-to-1 in kWh for home systems up to 25 kW (26 Del. C. § 1014). Unused credits now carry into the next year; utilities must update billing by December 1, 2026. Delmarva's own tariff still forfeited leftover credits when we read it on October 16, 2026.
- Delmarva Power grant
- $0.80 per watt, up to $10,000 and never more than 50% of project cost, for systems you own. You give up all of your SRECs and need pre-approval before installation.
- Co-op grant
- Delaware Electric Cooperative members get $0.70 per watt, up to $5,000 per address, first come, first served.
- Battery rebate
- Since August 11, 2026, Delmarva Power homes get $250 per kWh of battery size, up to $6,000 and never more than 50% of the battery cost.
- Newark grant
- $1.00 per watt for the first 5 kW and $0.50 above that, up to $3,500, with a waiting list. Dover says it has no solar incentive now.
- Lower incomes
- The Low- to Moderate-Income Solar Pilot gives a free system up to 4.0 kW to low-income homes and pays 70% of a system up to 6.0 kW for moderate-income homes.
- Solar loan
- Energize Delaware lends $5,000 to $50,000 at 3.9% for up to 15 years, for a system you own.
- SRECs
- Without a grant you keep your SRECs and can bid them in the SREC Delaware auction. In the last round, new Delaware systems won at $32.00 to $42.89 per SREC.
- Taxes
- No state solar tax credit and no sales tax. The federal homeowner credit ended for systems finished after December 31, 2025.
Who qualifies, deadlines and sources: Delaware solar incentives.
What to check with your utility
Delmarva Power
- Grant: get a home energy audit and pre-approval before the panels go up, and use a contractor on the program's list.
- Credits cover the per-kWh supply and delivery charges, not the fixed monthly customer charge.
- Battery rebate homes must join Delmarva's home-battery program for 10 years once it starts. Ask whether it has started.
Delaware Electric Cooperative
- Parts of its territory are closed to new solar that sends power to the grid. Check the map on its solar page before you sign.
- Its published rules still say unused credits expire each year. Ask whether it has made the carry-over change.
- Net metering is not available on a time-of-use plan.
Town utilities (Dover, Newark and others)
- Only Newark publishes a grant, up to $3,500 with a waiting list. Call before you install.
- Dover limits solar in some areas, handles applications in order and charges up to $200 for the two-way meter.
Check the company and its warranty
Three names can appear in one solar deal: the company that sells, the company that signs the contract and the licensed people who do the work. Check that they fit together.
- Contract company: look up its license on the Delaware Department of Labor contractor registration (Office of Contractor Registration) plus a Division of Revenue contractor business license. Delaware has no home improvement contractor license, and the Board of Electrical Examiners licenses electricians as individuals, not companies.. The name must match your contract.
- Electrical connection: Delaware law defines master and limited electricians as the people licensed to perform or supervise wiring for lighting, heating or power, and anyone else doing that work is an unlicensed practitioner (24 Del. C. § 1402: https://delcode.delaware.gov/title24/c014/sc01/index.html). Ask who does it.
- Warranty documents: ask for the workmanship warranty, the roof coverage terms and each equipment warranty before you sign.
Before your first sales call, read questions to ask your solar installer and how to read a solar quote.
Compare your Delaware quotes
Ask every company to quote the same basics. Then the differences you see are real.
From quote to permission to operate
Some steps overlap, and timing depends on your town, your utility and equipment supply. Ask each installer for a written schedule for your project.
Proposal and site check
The installer looks at your roof, shading and electrical panel and gives you a written proposal.
You and the installerDesign and applications
After you sign, the installer finishes the design and applies to your utility for the connection.
Installer; you sign the formsPermits and utility review
Your town or county reviews the building and electrical permits. The utility reviews the connection.
Permit office and utilityInstallation and inspection
The crew installs the system. A licensed electrician connects it, and the inspector checks the work.
Installer crew, electrician and inspectorPermission to operate
The utility approves the system and updates your meter if needed. Turn the system on only after this step.
Utility
How we rate Delaware solar companies
Each company gets up to 100 points from facts anyone can check: its own website and Delaware’s public license records, read October 14, 2026. Facts a company does not publish earn no points. No company pays for its rating, and we do not use customer star reviews.
- Licensing (30 points): an active state license, a licensed electrician and license numbers printed on its website.
- Warranty protection (35 points): workmanship warranty length, roof-penetration coverage in writing and any production guarantee.
- Local presence (15 points): an office in Delaware and Delaware named as a service area.
- Track record (10 points): years installing solar.
- Options (10 points): batteries and the number of ways to pay.
Stars: 85 points or more is 5 (Top-rated), 72 is 4.5 (Excellent), 60 is 4 (Very good), 45 is 3.5 (Good), below 45 is 3 (Average). We did not inspect installations, collect customer quotes or test customer service.
Delaware solar company FAQs
How do I check a Delaware solar installer?
Search the company in the Department of Labor contractor registry and the Division of Revenue business license search, and match the name to your contract. Delaware licenses electricians as individuals, so ask for the master electrician who will connect your system and check that license with the Division of Professional Regulation.
Does Delaware have net metering?
Yes, with every utility, under 26 Del. C. § 1014. Extra power is credited in kWh against later bills for home systems up to 25 kW. Unused credits now carry into the next year by law, and utilities have until December 1, 2026 to update their billing. Delmarva’s own tariff still forfeited leftover credits when we read it on October 16, 2026.
How much is the Delaware solar grant?
For Delmarva Power customers it is $0.80 per watt, up to $10,000 and never more than 50% of the project cost. Delaware Electric Cooperative members get $0.70 per watt, up to $5,000. Both grants take all of your system’s SRECs, and you need approval before the panels go up.
Can I get the grant with a lease or PPA?
No. The Delmarva Power program lists no incentive for leased or PPA systems, and the co-op grant is for systems the customer owns. The third-party owner can still claim the federal 48E credit, so ask who keeps the grant, the SRECs and the savings before you sign.
Will the companies on this page contact me?
Not because they appear here. This page is an editorial comparison. If you request quotes, the providers that serve your area may contact you. They can include installers, marketplaces and lead exchanges. Our page on how we make money explains how EcoGen is paid.
More Delaware solar guides
- Delaware solar costs
- Delaware solar incentives
- Is solar worth it in Delaware?
- Delaware solar guide
- Free solar panels in Delaware
- Questions to ask your solar installer
- How to read a solar quote
- Solar scams and red flags
- Questions to ask your solar installer
- How to read a solar quote
- Solar scams and red flags
- Solar financing: cash, loan, lease or PPA
Request Delaware solar quotes
When your shortlist is ready, enter your ZIP code to ask providers that serve your area for quotes.
Solar providers that serve your area may contact you, and they pay EcoGen for the introduction. Providers can include installers, solar marketplaces and lead exchanges, and more than one may contact you. How we make money.
