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5 Best Solar Companies in Delaware (2024 Guide)

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Author Icon By Tamara Jude Updated 01/08/2024

Delaware may rank 39th in the United States for solar energy production,* but government officials have developed an aggressive Renewable Portfolio Standard (RPS) goal to increase its clean energy use. Delaware will dedicate 40% of its electricity use to green energy resources by 2035. The government has also introduced state incentives and programs to make going solar more affordable for its residents. 

Our team spent over 60 hours researching the best solar installers nationwide, including regional and local companies. We’ve selected Delaware’s best solar companies and offered shopping advice for finding the right solar installer for your home. 

*According to data from the Solar Energy Industries Association (SEIA).

Company Star Rating BBB Rating Location Presence Link
4.8
A+ 50 States GET QUOTE
4.2
A+ 10 States GET QUOTE
4.4
A+ 6 States GET QUOTE
4.2
A 33 states GET QUOTE
4.2
A+ 9 States GET QUOTE
No results were found.

*All BBB ratings are current as of February 2024.


Delaware’s Top Solar Energy Companies


Our Top Picks for Solar Installation in Delaware

SunPower

Best High-Efficiency System
4.8

Pros and Cons

Pros Custom-built systems with in-house components 25-year comprehensive coverage, plus output guarantee In-house solar storage and electric vehicle (EV) upgrades Cons Coverage varies by ZIP code within the state Higher-than-average pricing, according to some customer reviews No variety for panels, components, or batteries

Why We Chose SunPower

You should consider SunPower if you’re looking to invest in the highest-quality solar system available. The company uses Maxeon’s high-efficiency solar panels and custom, in-house solar components designed to work optimally together. SunPower also offers its exclusive SunVault battery storage and EV chargers.

The company provides 25-year warranty coverage, including a power performance guarantee. This warranty promises that your panels will still produce 92% of their outlined power production levels after 25 years.

Warranty and Financing

Warranty
SunPower provides a comprehensive 25-year warranty covering panels, system components, add-on upgrades, and workmanship. Coverage also includes a 25-year power output production guarantee.

Financing Options
✔ Full purchase
✔ Loan
✔ Lease
✔ Power purchase agreement (PPA)

Reputation and Awards

SunPower has developed advanced solar technology since 1985. The company was honored with PV Magazine’s 2019 Sustainability Award and Good Housekeeping’s 2022 Home Renovation Award in the Biggest Energy Savers category for its SunVault energy storage system.

SunPower is accredited by the BBB and has an A+ rating from the organization. When we analyzed customer reviews, we found that homeowners appreciated the excellent system performance, noting immediate energy savings. However, some complained about higher-than-average system pricing and delayed communication with third-party installers.

Learn more: SunPower review


LGCY Power Best Solar Consultation
4.2
Pros and Cons: What Makes Them Different?
Pros Certified partner of Sunrun, one of the largest U.S. solar companies Hands-on, guided installation process from start to finish Library of informative blogs and solar power guides Cons Limited website details on offered solar products Some customer reviews noted customer support communication issues Varying product warranty lengths, depending on equipment
Why We Chose LGCY Power

LGCY Power offers a thorough solar consultation process, helping customers build the best custom system for their home. Customers receive a dedicated energy consultation that guides them through the solar panel installation. Its team also assists with applying for solar incentives, helping homeowners lower their solar panels costs. Its website includes guides and blogs on solar energy systems, financing options, and other solar-related topics.

The company works with Sunrun as a certified partner, offering its catalog of high-quality solar panels, inverters, and solar batteries. LGCY includes manufacturer and workmanship warranties. However, warranty length varies between products. LGCY also offers its customers ongoing system maintenance and 24-hour monitoring.

Warranty and Financing

Warranty
LGCY offers product, inverter, and workmanship warranties. However, warranty length varies between its products.

Financing Options
✔ Full purchase
✔ Loan
✔ Lease
✔ PPAs

Reputation and Awards

LGCY ranked 17th on the 2023 Inc. 5000 for the Rocky Mountain region. The company also ranked in 2019, 2021, and 2022. Utah Business chose LGCY for its 2019 Fast 50 list, recognized as one of the state’s fastest-growing companies.

The company maintains an A rating with the BBB* and is accredited by the organization. When checking online reviews, we found customers praised LGCY Power for its dedicated project managers and informed consultants but experienced communication issues with customer support.


Solar Energy World Best East Coast Installer
4.4
Pros and Cons
Pros Extensive catalog of solar panels, inverters, and solar batteries NABCEP-certified solar designers and in-house installers Complimentary system monitoring Cons Some customer reviews cite communication issues No company-level power production guarantee Warranty coverage varies by product
Why We Chose Solar Energy World

Solar Energy World focuses on a select East Coast service area to provide more personalized experiences. The company offers a large selection of solar panels from leading manufacturers, such as Silfab, LONGi, and Q Cells. Customers have more customization options with a choice of inverters and solar batteries, such as the popular Tesla Powerwall battery. Although the company offers manufacturer warranties with its purchases, they vary by product. 

Solar Energy World offers system monitoring and a dedicated app compatible with smartphones, computers, or tablets. The company assists with solar incentive applications and completes its projects with NABCEP-certified installers.

Warranty and Financing

Warranty
Solar Energy World offers 25–30 years of manufacturer coverage and up to 25 years for power production. However, coverage varies by solar panel and isn’t guaranteed by every brand.

Financing Options
✔ Full purchase
✔ Loan
✔ Lease
✔ PPA

Reputation and Awards

Solar Energy World was recognized as a Top Residential Installer by Solar Power World from 2014–2022. The company donates a portion of its profits to the GivePower Foundation, which provides solar-powered water purification solutions to developing countries. 

The company holds an A+ rating from the BBB and is accredited by the organization. In our customer review analysis, we noted that homeowners praised the company’s smooth installation process and knowledgeable staff but complained about communication issues that delayed their final system activation.

Learn more: Solar Energy World review


Trinity Best Certified Installer
4.2
Pros and Cons
Pros Additional roofing, electrical, and general contracting services Almost three decades of business experience Multiple certifications in solar installation Cons Five-year workmanship warranty No power production guarantee Some customers had issues contacting customer support
Why We Chose Trinity Solar

Trinity Solar stands out as one of the industry’s most experienced solar installers. It has 30 years of business experience and certifications from NABCEP and BPI. Its team of in-house installers is trained on the latest solar installation policies, ethics, and standards, ensuring a quality installation for each project. The company offers high-quality solar panels from Q Cells and SolarEdge, plus Enphase inverters and Tesla and Generac batteries.

Homeowners can review their system stats and energy usage through the SolarEdge or Enphase dedicated apps. Trinity also offers additional home services, including energy auditing, solar repair and maintenance, roofing, and electrical and general contracting.

Warranty and Financing

Warranty
Trinity Solar offers 25-year manufacturing warranties with its panels and a five-year workmanship warranty.

Financing Options
✔ Full purchase
✔ Loan
✔ Lease
✔ PPA

Reputation and Awards

Trinity Solar is the largest privately held residential solar installation company in the United States, with over 1,900 employees and 77,000 customers. The company partners with nonprofit organizations to raise money and provide no-cost installations to its members.

Trinity is accredited by the BBB and maintains an A+ rating. While reading homeowner reviews, we noted that customers praised the professional and helpful sales team but had difficulty contacting customer support for repairs.


Paradise Energy Solutions Best Mid-Atlantic Regional Installer
4.4
Pros and Cons
Pros Full-service installations with in-house installers High-efficiency panel solutions from Q Cells Smaller service area for more customized service Cons Additional costs for tiered monitoring and servicing protection plans Shorter workmanship and production guarantee coverage System monitoring is limited to 10 years
Why We Chose Paradise Energy Solutions

Paradise Energy Solutions offers full-service solar installations to Mid-Atlantic homeowners. The company employs in-house installers and guides you through the entire installation process, from design to activation. The company installs high-efficiency Q Cell panels and Enphase inverters. New customers receive the company’s “Triple Ten Guarantee,” covering workmanship, performance, and system monitoring. The company will compensate you if your system falls short of your estimated production levels.

Its Paradise Protect Service Plan includes tiered options for advanced system monitoring, performance analysis, and annual on-site checkups for solar owners outside their initial warranty. This includes existing customers or homeowners with systems from other solar providers. Paradise offers additional solar services to help maintain your system, such as maintenance and checkups, panel removal and reinstallation, and critter guard installation. It offers these at-cost services to any solar customers within its service area.

Warranty and Financing

Warranty
Paradise Solar Solutions provides 25–30 year manufacturer warranties that vary by solar panel brand. The company’s “Triple Ten Guarantee” includes 10 years of workmanship, performance, and system monitoring coverage.

Financing Options
✔ Full purchase
✔ Loan

Reputation and Awards

Paradise Energy Solutions holds an A+ rating from the BBB but is not accredited. We noted that homeowners were impressed by the company’s courteous customer service team and prompt installation experience, but some cited roof leak issues after installation.


What Are the Available Solar Incentives in Delaware?

Delaware offers several solar incentives, credits, and rebates to help lower solar panel installation costs and support its aggressive green energy goals. Although it has fewer incentives than other states, homeowners can still save money. The federal solar tax credit provides 30% off installation costs for photovoltaic (PV) panels, solar shingles, and stand-alone solar batteries. All Delaware residents who legally own their systems qualify; leasing and PPA customers are excluded.

  • The Delaware Sustainable Electric Utility (DESEU) offers a renewable energy credits program. Customers earn solar renewable energy certificates (SRECs) for generating solar energy. You can sell these credits in a specialized SREC marketplace for cash. Residents earn one SREC for each megawatt-hour (MWh) their solar power system generates. Homeowners must apply for the program to begin earning SRECs. It’s a very competitive program, so acceptance is not guaranteed. 
  • You can earn electric bill credits through Delaware’s net-metering program by returning excess energy to the power grid. Though payment rates vary among states, Delaware ensures customers receive the full retail electricity rate. This means you earn back what you originally paid for electricity. Delaware’s net-metering programs help homeowners pay off their solar systems quicker while supporting the state’s RPS. 
QUICK Tip
We recommend visiting the Database of State Incentives for Renewables and Efficiency (DSIRE) for an up-to-date list of available solar incentives and programs in your area.

Consider the factors below as you compare solar panel companies.

Solar Services

The solar installation process affects your customer experience and your system’s quality. Many companies use either in-house or third-party installers. In-house installers allow the company to maintain higher quality and better cross-team communication. Third-party installations involve various local contractors who may maintain varying standards. You’ll also have more points of contact with third-party teams, adding to communication issues. We recommend choosing solar companies with in-house installers to ensure a smooth process. 

We also suggest looking for companies that offer additional support services, such as ongoing system monitoring and energy audits. System monitoring offers insight into your panel performance, average energy usage, and system issues. Energy audits check your home for air leaks or poor insulation that could impact your energy costs. Resolving these efficiency issues will boost your solar system’s effectiveness and lower your energy bills. 

Warranties and Power Performance Guarantees

Most solar panel systems last 25 years or longer, so you’ll want excellent warranty coverage to protect long-term performance. Most solar installation companies offer manufacturer and workmanship coverage for each system. A manufacturer warranty covers any issues resulting from the manufacturer’s error. Workmanship warranties protect against issues caused by your solar installer. Both warranties are crucial to your system’s performance, ensuring your energy production and savings last through the system’s lifetime. Ideally, you’ll want the longest coverage available, so look for warranties that last 25 years or longer. 

Your installer may also offer a power production guarantee, which protects your system’s energy production. Solar panels lose 0.5% efficiency annually. Solar companies know about this gradual decline and add warranty provisions to back their panels’ performance. Top-performing residential panels include production protection for 25 years or longer, while cheaper solar panels include 10–15 years of coverage. During our solar company research, we’ve seen protections as low as two to 10 years. Although a power production guarantee isn’t typical, it’s an excellent added protection for your system’s long-term performance. 

Payment Options

Solar financing options affect your up-front costs and return on investment (ROI). Cash and solar loans are the two most common payment options and provide the best financial benefits. These options make you the legal system owner and qualify you for most solar incentives. You’ll benefit from additional solar savings and a better solar payback period, which is the time it takes for your system to pay for itself. 

Additional options, such as solar leases and power purchase agreements (PPAs), keep system ownership with the solar company. You won’t qualify for additional incentives and receive minimal financial benefits. However, solar leases work well for homeowners uninterested in owning a solar system. 

When we spoke with solar experts, they recommended cash payments and solar loans for maximum financial benefits.

Customer Support

You should also consider each company’s customer support options. When reading customer reviews, we noticed that some homeowners complained about unresponsive customer support teams. Some companies offer limited contact options, such as phone or email. Other companies include added contact features, such as online chat and in-app correspondence. Check each company’s contact options and customer reviews to gauge customer experience.


How To Get a Solar Quote in Delaware

You’ll need detailed product and service quotes to compare each solar company. Below is an overview of the typical quote process when researching Delaware solar installers. 

  1. Contact each solar installer: Most companies offer online forms or phone numbers to begin the quote process. When using online forms, check the terms to ensure you aren’t signing up for automated SMS and phone calls. When our team conducted secret shopping for solar installers, it was common to speak with at least two representatives. The first rep qualifies you for the company’s solar services, the next is the sales representative. 
  2. Schedule a consultation: You’ll meet with a company representative for an in-person or virtual appointment. Check your phone or computer for any system requirements indicated on the website for virtual visits. 
  3. Review your electricity use: This step requires access to your most recent energy bills. Solar companies review your past energy use to determine the best system size for your energy needs. Although some companies only require the most recent bill, having multiple months available is best. 
  4. Assess your roof layout: Companies must check your roof layout and available space to accurately plan your solar array. They’ll consider structural designs, such as chimneys and skylights, and check for surrounding objects and trees. Since solar panels work by absorbing sunlight, any objects that cast surface shadows will impact their efficiency. Reps may recommend tree removal, roof repair, or electrical services before your solar system installation. 
  5. Create your solar system: The solar company will build your system based on your previous assessments. You’ll have input into the type of solar panels, available inverters, and any add-ons or upgrades, such as electric vehicle (EV) chargers and solar batteries. Customization options vary between providers. 
  6. Check the final system design and contract: You’ll receive a detailed quote listing all items for your new solar system. Your itemized quote includes all equipment details, solar panel costs, labor charges, and warranty coverage. Installers also provide details on financing options and your estimated solar panel payback period. Some solar installers also assist with solar incentive applications to help reduce your up-front costs. We recommend reviewing each company’s final quote and contract before committing to a provider.

Our Conclusion

SunPower tops our list of best Delaware solar installers thanks to its industry-leading, high-efficiency systems and 25 years of system protection. Although it’s more expensive than many providers, it’s worth it to invest in a reputable company with leading solar technology. 

We recommend getting free quotes from at least three companies as you search for the right solar provider.


Other Delaware Home Service Resources


FAQ About Solar Companies in Delaware

Can you get free solar in Delaware?

No, free solar panels are not available in Delaware. However, you can use federal and state solar incentives to reduce your solar conversion costs. Local utility companies also offer rebates and credits to customers converting to solar power. Check with your utility company for more information. 

Does Delaware have a solar tax credit?

No, Delaware does not offer a state solar tax credit. Instead, homeowners should use the federal solar tax credit to qualify for up to 30% off their solar panel installation costs. This credit is available to all residents who own their solar panel system. 

Does Delaware offer property tax exemption for solar?

No, Delaware does not exempt property taxes for solar panel installation. Residents benefit from the boost in home value with solar but will face high property taxes.

Can I lease solar panels in Delaware?

Yes, Delaware allows solar panel leasing. However, leases offer the least financial benefits and ROI. Unless you’re adamant about not owning your solar system, we recommend a cash payment or solar loan for the best financial benefits.


Our Rating Methodology

The This Old House Reviews Team is committed to providing comprehensive and unbiased reviews to our readers. After over a thousand hours of research on solar companies, interviews with experts, and common customer needs, we’ve created a detailed rating system for solar providers based on six factors:

  • Solar equipment, installation, and services (25%)
  • Warranty and performance guarantees (25%)
  • Brand reputation and certifications (15%)
  • Financing options (15%)
  • Experience (10%)
  • Availability (10%)

Total scores are divided by 20 for a final 5-point rating scale.

To share feedback or ask a question about this article, send a note to our Reviews team at reviews@thisoldhousereviews.com.