Solar Panel Cost in Delaware (2023 Local Savings Guide)

Here’s a quick look at the estimated cost of solar in Delaware:

  • Average Cost Per Watt: $2.58
  • Cost of Average System: $17,157*
  • Cost of Energy Without Solar: $46,173
  • Payback Period: 12 Years**
  • Lifetime Savings of Going Solar: $29,016

*Average system size is calculated using data from the Energy Information Administration. This price is after tax credit.
**Payback period is calculated assuming the system is purchased in cash.

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Cost of Solar Panels in Delaware

The average cost of solar panels in Delaware is $2.58 per watt, which is below the national average electricity rate of $2.66 per watt. Typically, a 9.5-kilowatt solar system is a common size in Delaware to offset the average monthly utility bill of $117 per month.1 A 9.5-kilowatt system would cost $17,157 after claiming the 30% federal solar tax credit.

With that said, a 9.5-kilowatt system isn’t the best for every Delaware resident. How many solar panels you need for your home will vary based on factors like your energy usage, your home’s natural shade and more. Regardless, system size will have a large impact on the cost of a solar project.

Keep reading to learn more about solar costs and incentives in Delaware. Or, if you want to jump straight to getting a quote for an installation, you can follow the links below to speak with a verified professional.

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Green Street Solar

Outstanding Regional Installer

Regional Service

EcoWatch rating

Average cost


  • NABCEP-certified technicians
  • Locally owned and operated
  • Many financing options


  • Limited service offerings
Badge icon

Solar Energy World

Outstanding Regional Installer

Regional Service

EcoWatch rating

Average cost


  • Excellent reputation
  • Independently owned and operated
  • Offers products from leading manufacturers


  • Some reported communication issues
  • Less personalization than competitors offer
Badge icon

Clean Energy USA

Outstanding Local Installer

Local Service

EcoWatch rating

Average cost


  • Excellent reputation
  • Many years of experience
  • NABCEP-certified technicians


  • Slightly expensive
  • Limited information available on website

Solar Panel System Installation Cost in Delaware

The below chart shows the average solar panel installation cost in Delaware before and after factoring in the 30% solar tax credit. As we show below, system size (in kilowatts) correlates directly with the cost. It also determines whether you can meet 100% of your home’s power needs with clean energy and eliminate your energy bills. 

For homeowners simply seeking a supplemental energy source, investing in a smaller system that can cover a portion of their energy needs makes sense. However, for those who want to rely solely on home solar power, installing a properly sized system is critical. If you want to entirely eliminate your energy bills with solar, you’ll need to have a large enough system to meet or surpass your average energy consumption. 

Size of Solar Panel System Delaware Solar Panel Cost Cost After 30% Federal Tax Credit
7 kW $18,060 $12,642
8 kW $20,640 $14,448
9 kW $23,220 $16,254
10 kW $25,800 $18,060
11 kW $28,380 $19,866
12 kW $30,960 $21,672
13 kW $33,540 $23,478

Interested in seeing the best solar providers in Delaware that offer affordable yet high-quality systems? Click here.

See also: Find out how much solar power your roof can produce with our solar calculator

What Determines the Cost of Solar Panels in Delaware?

Solar panel systems in Delaware typically cost between $12,642 and $23,478 after the federal investment tax credit (ITC) is applied. The price range is so wide because many factors can bring your up-front and total costs up or down by thousands of dollars. We’ll discuss some of the most prevalent factors in Delaware below.

Solar Equipment

The type and brand of equipment you want installed is the most significant factor to consider. Most homeowners will choose solar equipment based on its efficiency and warranty. More efficient panels and those with better warranties are almost always more costly.

Thankfully, Delaware experiences 202 sunny days per year on average which is just below the national average of 205 days. Given the ample amount of sunlight, high-efficiency panels likely aren’t necessary, so you can safely opt for less expensive equipment in most cases.

With that being said, due to Delaware’s coastal location residents often experience extreme weather events including hurricanes, tropical storms and strong winds. Power outages are common in many parts of Delaware, so many homeowners opt to install solar batteries to maintain power through outages. 

Additionally, choosing a solar panel brand with a good warranty and service that includes roof leak protection will cost more but is often worth the added investment in an area like Delaware.

Solar Financing in Delaware 

The type of financing you choose will also affect both your up-front and long-term costs of going solar. Paying cash requires the maximum up front but minimizes your total cost because you avoid interest. Solar loans require little to no money down but will cost more in total.

If you do go the route of financing your solar panels, the loan and lender you choose can also affect your pricing. Delawareans can take advantage of programs like the Residential Solar Loan Program from Energize Delaware or the Low- to Moderate-Income Solar Pilot Program offered by the State of Delaware.2,3

You can also look for grants that are available from your electric company, like the Green Grant Delaware program from Delmarva Power, Delaware Electric Cooperative’s solar grant or the Municipal Green Energy Program grant via Municipal Electric.4,5,6

Delaware Solar Installation Company

close-up shot of solar panels

Every Delaware solar panel installation company will charge different amounts for services and equipment, so the specific installer you choose can affect your pricing. For example, Green Street Solar, one of the top local solar installers in Delaware, installs a wide range of panel brands like LG, SMA and Jinko. 

These brands tend to be less costly than the Maxeon brand panels offered by SunPower, another top installer in Delaware. Your total cost is very likely to be higher with SunPower for this reason, although you also get one of the highest panel efficiencies and best warranties in the industry.

Local companies in Delaware — like Green Street Solar — tend to charge a bit more for equipment than national companies because they don’t buy panels and inverters in bulk. However, they sometimes offer discounts on equipment to be able to compete with bigger players in the area like SunPower and Solar Energy World.

Additional Considerations and Costs

There are some more minor costs in Delaware you should consider as well, which we’ll discuss briefly below.

  • Permits: No matter where you live in Delaware, your municipality will require building permits for solar panel installation. Depending on your town or city, the price for permits could range from $75 to several hundreds of dollars. Your installer will typically file for the permit, but the fee will be passed on to you.
  • Licenses: The State of Delaware mandates that any installer of photovoltaic equipment be licensed as an electrician. This doesn’t directly come with any charges for you, but the added licensing requirements for installers in the area will tend to make prices a bit higher overall.
  • Warranties: The warranty you get from your panel manufacturer and installer will protect your investment and your property from damage related to the system. This protection is crucial for your peace of mind and safety, and while more comprehensive and longer warranties are better, they also tend to be connected with more costly panels.
  • HOAs: Delaware passed legislation in 2009 that prohibits homeowners’ associations and other private entities from preventing you from installing solar.7 Again, this won’t affect your cost, but it’s important to know your solar rights.
  • Environmental zoning: Zoning laws can sometimes prevent solar panel installation, especially if you’re looking to install a ground-mounted system. However, the laws in Delaware are generally in favor of solar adoption, so you shouldn’t run into any issues.

Delaware Solar Panel Incentives

Delaware homeowners who switch to solar have access to various incentives. Although solar energy systems installed in the state aren’t exempt from sales or property tax, homeowners may utilize other financial incentives to help cut back on the overall cost.

Delaware Solar Incentive How it Affects the Cost of Solar Panels in Delaware
Solar Renewable Energy Credits Due to Delaware’s Renewable Portfolio Standards, or RPS, utility companies in the state must derive 40% of their energy from renewable sources by 2035. To help with this, homeowners can earn solar renewable energy credits, or SRECs, which can be sold to utilities for cash via the SREC marketplace.
Net Metering Delaware offers a statewide net metering program that happens to be one of the best in the country. In other states, solar customers who participate in net metering programs may receive credits worth an amount lower than the retail rate of electricity, but Delaware ensures they can be exchanged 1:1 to offset energy bills.
Local Solar Rebates & Incentives Several utility companies in the state offer excellent rebates to their customer base. For example, Delmarva Power and Delaware Electric Cooperative’s Green Energy Programs hand out rebates of up to $6,000 and $2,500, respectively.
Federal Solar Tax Credit The solar investment tax credit (ITC) allows homeowners to claim 30% of their total solar equipment and installation costs as a tax credit. All U.S. residents are eligible for the 30% tax credit through 2032. 

The Best Solar Panel Brands Available in Delaware

The brand of solar panel you choose will affect many aspects of your system, including the overall efficiency and power production, the warranty and the cost. The table below shows relative pricing for some of the best solar panel brands in Delaware, so you can use this as a reference to help decide which brand might fit your budget.

Solar Panel Brand Average Cost Per Watt ($-$$$$$)
LG Solar $$$
Canadian Solar $$$
JA Solar $$
Mission Solar $$
Panasonic $$
Q Cells $$
REC $$$
Silfab $$$
SunPower $$$$$
Tesla $$
Trina Solar $$$

Want to know what size solar system you need to offset your specific energy needs and how much the panels will cost? Check out our preferred solar providers in Delaware below to get a free quote from a top installer in your area.

Read More About Going Solar

FAQ: Solar Panel Cost Delaware

At EcoWatch, we get questions every day about solar, some from Delaware homeowners. If you have specific questions that aren’t answered here, reach out to our team of solar experts at


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Article author
Karsten is an editor and energy specialist focused on environmental, social and cultural development. His work has been shared by sources including NPR, the World Economic Forum, Marketwatch and the SEIA, and he is certified in ESG with the CFA Institute. Before joining EcoWatch, Karsten worked in the solar energy sector, studying energy policy, climate tech and environmental education. A lover of music and the outdoors, Karsten might be found rock climbing, canoeing or writing songs when away from the workplace.
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Expert reviewer
Melissa is an avid writer, scuba diver, backpacker and all-around outdoor enthusiast. She graduated from the University of Florida with degrees in journalism and sustainability studies. Before joining EcoWatch, Melissa worked as the managing editor of Scuba Diving magazine and the communications manager of The Ocean Agency, a nonprofit that’s featured in the Emmy award-winning documentary Chasing Coral.

Top Installers For Delaware

Comparing authorized solar partners

EcoWatch rating
Average cost
BBB Rating
Year founded
Service Area
Brands of Solar Equipment Offered
Warranty Coverage
  • 4.5
    • NABCEP-certified technicians
    • Locally owned and operated
    • Many financing options
    • Limited service offerings
    Outstanding Regional Installer

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