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Best Solar Companies in Delaware

Project Solar, Star Enrg and ShopSolar are our top picks

    • Project Solar
      4.5(86)
    • Star Enrg
      5.0(1)
    • ShopSolar
      4.7(218)
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    By: Kathryn Parkman
    +2 more
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    Edited by: Justin Martino
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    Fact-checked by: Jon Bortin

    Best Solar Companies in Delaware

    Based on factors like local customer satisfaction ratings, payment options and warranties, Project Solar consistently delivers the best value. Star Enrg stands out for specializing in commercial and agricultural solar panel installations, and ShopSolar is our pick for do-it-yourself projects.

    Why trust ConsumerAffairs?
    • Our recommendations are based on what reviewers say.
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    Our 3 picks for the best solar companies in Delaware

    1. Best for value: Project Solar
    2. Best for commercial and agricultural projects: Star Enrg
    3. Best for DIY projects: ShopSolar

    The ConsumerAffairs Research Team compared popular solar companies on local ratings and reviews, warranties, availability and other factors to select the top picks for this guide.

    Some of our picks are Authorized Partners that compensate us, but this does not influence our evaluations. Read the full methodology for all the details on how we make solar company recommendations.

    Compare top-rated solar energy companies in Delaware

    Our Delaware solar company picks

    Switching to solar power is one of the smartest investments Delaware homeowners can make. But choosing the right installer can make all the difference. To help you find a company that fits your needs, we’ve researched and compared the top solar providers in the state.

    Our top pick overall

    Project Solar

    Project Solar
    4.5
    86 reviews
    Max. panel efficiency
    20.9%
    Panel warranty
    25 years
    Payment options
    Cash, loan
    Year founded
    2016
    Read Reviews
    Pros
    • Transparent pricing
    • Easy sign-up process
    • High-quality equipment
    • Great value
    Cons
    • Occasional communication issues
    • Subcontracted installers

    Project Solar reps focus on simple, streamlined installations. The no-sales-gimmicks approach appeals to more budget-conscious clients who want either professional services or do-it-yourself options.

    We also appreciate the price transparency. Full-service installations start at $1.61 per watt. DIY projects are cheaper, starting at $1.26 per watt.

    The company partners with a few lenders to offer financing solutions for professional solar installations. DIY customers can pay cash or finance through a third-party lender.

    What to consider: The installation process is generally smooth and professional, but we have heard about some delays due to material shortages or supply chain issues.

    • Energy services: Reps can handle the necessary paperwork, engineering plans and permit submissions for the installation.
    • Equipment options: Systems incorporate equipment from reputable brands like Qcells, Canadian Solar, Jinko and Enphase.
    • Warranties: There is a 25-year manufacturer’s warranty and a 10-year workmanship warranty. Both are limited and have exclusions like weather damage or misuse.
    Our pick for commercial and agricultural projects

    Star Enrg

    Star Enrg
    5.0
    1 review
    Max. panel efficiency
    Varies
    Panel warranty
    25 years
    Payment options
    Unclear
    Year founded
    2008
    Read Reviews
    Pros
    • Certified installers
    • Strong solar-plus-storage designs
    • Ongoing system monitoring
    Cons
    • Occasional installation delays
    • Some BBB complaints

    Star Enrg is a solar installer headquartered in Newark, Delaware. It specializes in offering modern technology, like energy storage and system monitoring, to maximize efficiency.

    Reps can also help businesses and farms go solar. The company has lots of experience in guiding commercial and agricultural clients through available incentives in Delaware and other states.

    What to consider: Some BBB complaints say that getting final components or monitoring (metering, performance monitoring, battery installations, etc.) takes longer than expected.

    “Star Enrg worked professionally and was a pleasure to deal with during the installation. There was no stress or worries before, during, or after.”
    Marcus Wilmington, DE
    • Energy services: Star Enrg offers customized solar solutions for residential, commercial and agricultural projects, including roof- and ground-mounted systems.
    • Equipment options: Installers use Enphase Energy, Fronius Solar Energy, SolarEdge and LG Electronics equipment.
    • Warranties: Solar panels typically come with a 25-year warranty.
    Our pick for DIY projects

    ShopSolar

    ShopSolar
    4.7
    218 reviews
    Max. panel efficiency
    Varies
    Panel warranty
    Varies
    Payment options
    Cash, loan
    Year founded
    2018
    Read Reviews
    Pros
    • Price-match guarantee
    • 30-day return policy
    • Lifetime customer support
    Cons
    • Some shipping and delivery delays
    • Occasional issues with defective or damaged products

    ShopSolar is an online retailer that sells custom solar kits and other equipment like solar storage batteries and generators.

    It’s a convenient place to buy everything needed for a do-it-yourself solar project. We like that it has a nice selection of equipment, fast deliveries and good communication.

    You pay for your order in full upfront through ShopSolar’s secure website. Financing is available at rates from 0% to 36% APR.

    What to consider: Some customers experienced problems with their purchases, such as damaged or faulty equipment. Generally, ShopSolar resolved these issues with refunds or replacements.

    • Equipment: You can find new and used solar panels, solar storage batteries, inverters, charge controllers, cabling and hardware, mounts and racks. Equipment comes from quality brands like REC, Renogy, Canadian Solar and EcoFlow.
    • Warranties: ShopSolar is an authorized distributor of all the brands it sells, so all solar equipment is covered by the individual manufacturers’ warranties.

    Methodology: How we chose the best solar companies in Delaware

    We started with a list of popular solar companies and narrowed it down to those serving Delaware. We then ranked them based on the factors that matter most to homeowners:

    Local customer satisfaction (65%)
    We analyzed reviews from verified customers in Delaware. Companies with the most recent positive ratings were scored higher.

    Price satisfaction (7%)
    We evaluated customer feedback on overall cost and value.

    Payment options (7%)
    We considered companies that make paying for solar easier by offering multiple financing and payment options.

    Warranties and guarantees (7%)
    A long warranty shows confidence in a company’s work. We compared both equipment and workmanship warranties. Our top picks provide 10 to 25 years of coverage.

    Installation satisfaction (7%)
    We looked at reviews of the installation process, including professionalism, timeliness and overall quality of the work.

    Customer service satisfaction (7%)
    We evaluated feedback on how responsive and helpful each company is before, during and after installation.

    Solar Companies in Delaware Buyers Guide

    Jump into our guides and start learning

    In this guide

    Top Picks

    See who reviewers like

    Project Solar logo
    Star Enrg logo
    ShopSolar logo
    See our top picks

    Simplify your search

    Switch to solar with a system built for you.

      Solar panels last a long time — you want to hire a well-established company that will still be around for system support for at least 25 years. Our team has talked to thousands of solar customers across the country. Here’s what to expect and what to look out for when buying solar panels in Delaware.

      Key insights

      In Delaware, a typical 10-kilowatt residential solar panel system is $22,491 before any financial incentives.

      Jump to insight

      Delaware has relatively low installation costs, reasonably competitive solar potential and solar-friendly policies, including net metering and power purchase agreements.

      Jump to insight

      The 30% federal solar tax credit is expiring sooner than expected. You now only have until Dec. 31, 2025, to install a system and get the 30% solar tax credit.

      Jump to insight

      The state is taking steps to protect solar customers against unscrupulous sales pitches in the residential rooftop solar industry.

      Jump to insight

      How much does it cost to go solar in Delaware?

      Delaware solar panel costs typically range $7,872 to $22,491. The size of your solar panel system is a big factor in your total cost. It also depends on what incentives you’re eligible for, the condition of your roof and how much sunlight exposure it gets.

      A typical Delaware household needs a system with a capacity of 7.7 kW to offset enough energy costs to make solar viable. You might need a smaller or larger system depending on your household energy usage.

      Most installers set the price according to the system's wattage, with a typical cost between $2.50 and $5 per watt. In Delaware, the average cost per watt is $2.25.

      Average solar panel cost by system size in Delaware

      Author’s note

      The table above doesn’t include the cost of a solar storage battery. Solar batteries are sometimes as expensive as the panels — $7,000 to $18,000. Solar batteries are a must if you want real energy independence and essential if you go off-grid.

      How can I pay for solar panel installation?

      Getting solar panels is like buying a car. You could pay cash, but a lot of people finance their system through a solar loan or lease solar equipment.

      Delaware also has legalized power purchase agreements. PPAs work very similarly to leases. The biggest downside to both is that it might make your house harder to sell, since a new buyer will have to take over the contract.

      Assuming an upfront purchase, it takes about 8.51 years to break even (when your savings with solar panels make up for the cost).

      Consider your current electric bill

      Getting a loan for solar panel installation makes sense as long as your monthly loan payment is cheaper than what you’d be paying for electricity anyway. Then, once the loan is paid off, you essentially get free electricity.

      » SOLAR PANELS: Lease vs. buy

      Solar incentives in Delaware

      Residents can take advantage of several solar incentives in Delaware, like the Green Energy programs through Delmarva Power, Delaware Electric Cooperative and DEMEC Member Utilities.

      The federal solar tax credit expires at the end of 2025.

      The federal solar investment tax credit (ITC) is the biggest factor in reducing the cost of going solar in Delaware through the end of 2025. The ITC credits 30% of the system’s total cost — including equipment, labor and permits — toward what you owe on federal income taxes.

      Net metering in Delaware

      In Delaware, net metering lets solar owners get credit on their utility bills when their panels make more power than they use. Extra electricity is credited at a per-kWh supply and distribution rate.

      To qualify, your system can’t be oversized — it must be designed to produce no more than 110% of your typical electricity use. The size cap is 25 kW for most homes, with higher limits for farms and businesses.

      Key takeaway
      Net metering won’t give you a cash payout for leftover credits. But it’s still one of the best ways to cut your electric bills and speed up solar payback time.

      What to look for in a solar company in Delaware

      In our experience, the best solar energy companies have a few things in common:

      • Proper credentials: In Delaware, solar installers only need a standard electrical license, but look for contractors certified by the NABCEP (North American Board of Certified Energy Practitioners). It’s the gold standard for solar training and expertise.
      • Proven experience: Choose a company with years of hands-on solar installations in Delaware. Local knowledge is invaluable for navigating state rules, permits and incentives.
      • Strong reputation: Check customer reviews, ratings and testimonials to see how well the company delivers on service and support.
      • Free consultations: Compare quotes from multiple installers. Beware of unusually low bids. This could signal cutting corners or using lower-quality equipment.
      • Comprehensive warranties: Reliable companies back their work with warranties lasting 10 to 25 years to protect your investment.
      • Transparent terms: Read contracts carefully and ask about anything you don’t understand (especially payment terms, warranties and service agreements). Good companies prioritize clear communication before, during and after installation.

      » TIPS: Get the best solar quotes

      FAQ

      Are solar panels worth it in Delaware?

      Solar panels are generally worth it in Delaware if you like the idea of lower monthly utility bills and more energy independence.

      But buying solar panels is still a big upfront investment. It takes time to recover this initial investment through savings on your electricity bills. If you plan to move before recovering these costs, you might not fully realize the financial benefits.

      Your savings with solar depend on how much electricity your system can produce and the cost of electricity in your area. If electricity rates continue to go up, your net savings will equal even more over the lifetime of the solar panel system, making the investment financially worth it.

      » STILL NOT SURE? Solar energy pros and cons

      How do I know if my house is a good candidate for solar?

      Plenty of unshaded roof space that faces south or west is best for optimal sun exposure.

      Solar photovoltaic (PV) technologies, more commonly known as solar panels, absorb sunlight and convert it into usable electricity. If you have a lot of shading around your house, they might not get enough sun to power your home.

      It’s also smart to upgrade any old, inefficient appliances first. Reducing your electrical loads now means you can get a smaller, cheaper system.

      The condition of your roof matters too — if it needs replacement soon, do that before installing solar panels. Going solar with an old roof might mean you have to remove the panels, replace your roof and then reinstall the panels. This will cost around $5,000 for a 19-panel setup.

      Is my HOA allowed to restrict solar panels?

      Delaware homeowners associations have some authority over how you install solar in Delaware. But they can’t ban solar outright. The restrictions must not “significantly increase the cost of the system or significantly decrease its efficiency or specified performance,” according to Delaware law.

      Is it cheaper if I install solar panels myself?

      It’s potentially cheaper to install solar panels yourself. It’s also dangerous if you don’t know what you’re doing, especially for a large residential project.

      » DIY solar panels: Pros and cons

      Compare more solar companies servicing Delaware

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      Guide sources

      ConsumerAffairs writers primarily rely on government data, industry experts and original research from other reputable publications to inform their work. Specific sources for this guide include:

      1. DSIRE, "Delaware Solar Programs." Accessed Sept. 16, 2025.
      2. Solar Delaware, “Delaware Solar Policy.” Accessed Sept. 16, 2025.
      3. Delaware Public Service Commission, “Electric Regulation.” Accessed Sept. 16, 2025.
      4. Delaware Department of Natural Resources and Environmental Control (DNREC), “Green Energy Program.” Accessed Sept. 16, 2025.
      5. The Delaware Code Online, “Title 25 Chapter 3.” Accessed Sept. 16, 2025.
      6. U.S. Department of Energy, “Homeowner’s Guide to Going Solar.” Accessed Sept. 16, 2025.

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