Solar panel cost in Delaware

The average cost for an installed residential solar system in Delaware is currently $11,757 after claiming the 26% federal solar tax credit. This is $2.65 per watt.

Showing data for:

Utility provider: City of Dover
Utility bill: $ 79

Prices based on a 5.8kW system, after 26% federal tax credit

Solar prices near you

Cost range of local prices


Net profit (savings less system cost)


Payback period

10.8-13.2 years

Recommended size for the selected utility bill


Chart 1: Distribution curve of DE residential solar cost 2020
SolarReviews average

Note: Prices after 26% Federal Solar Tax Credit

DE solar panel cost calculator

Cash flow graph based on cash purchase of a 5.8kW system

Delaware solar power overview

Delaware is a great place to go solar, due to a solid renewable portfolio standard with a great solar carve out, an array of solar incentives, state-mandated net metering, and the federal tax credit

All of these incentives make the switch to solar more affordable for Delaware homeowners. However, many of the incentive programs fill up fast and some programs have already been fully allocated, so the sooner you install solar, the more savings you're likely to get.

Are solar panels worth it in Delaware

Solar panels have fallen in price by more than 80% in the last ten years. In 2020 they also remain subsidized by the 26% federal tax credit and the net metering law, making them an excellent investment. They offer a return well above the long term average return from both the share market and also property investment.

Another way to look at this question is the levelized amount you will pay for each kWh of power you will use over the next 25 years with and without solar panels. As you can see below the savings are significant.

Levelized cost of solar energy
Levelized cost per kWh is the cost of the solar system divided by the total number of kWh produced by a solar system over it’s lifetime

5¢ /kWh

If you don't get solar

24¢ /kWh

(forecast avg Delaware electric rates over the next 25 years)

Delaware solar incentives & tax credits

Federal tax credit

The most significant incentive to install solar panels for homes and businesses in Delaware is the federal solar tax credit. At the end of 2020, the amount of the credit will decrease from 26% to 22% of the cost of the solar installation. 

Because home and business owners want to get the largest incentive amount possible, solar panel installation companies will likely be flooded with new projects before year’s end. In order to maximize your savings potential, the best time to go solar in Delaware is now.

Net metering

Delaware law requires utilities to offer full retail net metering to their customers, meaning that customers will receive the full retail value for each kilowatt-hour (kWh) of energy their solar panel systems produce. 

Utilities are required to issue a credit that will be applied to future electricity bills that help to reduce costs. Delaware has expensive electric rates, so the savings you’ll get through net metering are significant.

Delaware Municipal Electric Corporation (DEMEC) Member Utilities Rebate

Through the DEMEC, residents of the City of Newark have access to one of the best incentives available in Delaware. The DEMEC will cover 33.3% of the costs associated with installing a solar system - up to $7,500. 

That, on top of the federal tax credit, can save you a pretty penny. 

Delaware Electric Cooperative Rebate

Delaware Electric Cooperative will give its customers a one-time rebate of $0.50 for each watt of solar installed on their home, up to 5 kilowatts (kW). For each additional watt above 5 kW installed, the utility will pay $0.20. The maximum total rebate available is $2,500. 

Unfortunately, the application period for 2020 came to a close on January 10, but depending on funds, applications may be accepted at other times throughout the year. This program can fill up fast, so the sooner you install solar - the better!

Delmarva Power Rebate

Delmarva Power, Delaware’s only investor-owned utility, will pay their customers $0.50 for every watt of solar they install, up to $3,000. This rebate can help significantly decrease the upfront installation costs of a solar system. 

This rebate greatly helps homeowners paying for solar.

Table 2: Available incentive programs
Eligibility: Federal incentive
Type: Personal Tax Credit
Eligibility: State incentive
Type: Net Metering

Showing 1 - 2 of 5

Top 10 solar panel brands installed in Delaware in 2020

Average cost of solar panel installation in Delaware by system size

System size*
Cash purchase

(After tax credit)

Financed purchase

(After tax credit)

4kW $11,564 $12,373
5kW $13,870 $14,841
6kW $15,888 $17,000
7kW $18,347 $19,631
8kW $21,280 $22,770
9kW $23,103 $24,720
10kW $25,400 $27,178

Best solar companies in the main cities of Delaware

Different types of solar companies

Solar company reviews

Home solar basics

Is it better to lease or buy solar panels in Delaware

You will save most money by buying your solar system rather than leasing it. Read more about the pros and cons of leasing vs buying solar.

How long do solar panels last?

Minimum of 25 years but generally 30 or more

How do solar panels work on a home?

Solar panels power your house when they can but your home uses the utility company for power at other times. In 2020 "solar systems with battery storage" are becoming more popular. These are known as hybrid systems.

How do solar panels work?

Grid-tied solar system

Solar panels are mounted on your roof and wired together in groups called solar arrays. The power they generate flows into a solar inverter where the direct current (DC) electricity is converted into alternating current (AC) electricity that can be used by your home or exported to the electric grid.

Off-grid solar system

Off-grid solar power involves meeting all your energy needs from the power of the sun. There’s no utility to fall back on. This means the solar installation needs to power the home not just during the day, when the sun is shining, but after dark as well.

Read more about types of home solar systems.

Do solar panels require regular maintenance?

No, but cleaning them can improve power generation if they are dirty.

Will residential solar power system cost fall in Delaware in 2020?

Given this environment, and the effect of import tariffs placed on solar panels by the Trump administration during 2018, it is hard to see that solar power system prices in Delaware will fall during 2020.

Can you buy DIY Solar Panel Kits and install them yourself in Delaware?

Yes you can! In some cases, you can save $3,000 or more when you install solar yourself, even after receiving the federal tax credit. Despite the potential for savings, data from Lawrence Berkeley Labs shows that only about 3% of homeowners choose DIY solar. 

Reasons for this include:

  • The permitting and inspection process for the utility, the state, and municipalities can be quite complex.
  • The installation work is both dangerous and difficult, with electrical work having to be performed at heights.
  • Often times, solar electricity customers will be charged a premium for DIY installations, which can limit savings.
  • In some states, a solar system needs to be installed by a qualified solar contractor in order to take advantage of incentives. In Delaware, this means the contractor must have an electrician’s license. Some incentives may even require the contractor to be NABCEP-certified.  


SolarReviews does not recommend DIY solar installations unless you have suitable skills. However, for those who do, SolarReviews published a comparison table displaying solar panel kit prices from the top 10 leading solar kit websites in the US.

Buy DIY solar panel kits online

Prices don’t include installation, permits or inspections

How much electricity do solar panel systems generate in Delaware?

Depending on the location, solar panels will generate different amounts of electricity.

A solar system that is installed on a south-facing 29-degree pitch roof Delaware will generate 1,168kWh of peak DC (direct current) capacity per year per 1kW in Delaware.

Enter your details into the solar panel calculator to see how your location, roof tilt, and roof direction impacts solar panel production.

What are the pros and cons of installing solar panels in Delaware?

The advantage of installing solar in Delaware is the state-mandated net metering requirement. Utilities must offer kilowatt hour (kWh) credits for excess energy generated by solar systems. 

Because Delaware has expensive power, the overall return on investment for the installation of residential solar panels is fantastic. Delaware also has a variety of utility incentives that make going solar even more affordable.

The disadvantage of installing solar panels in Delaware is that the state does not receive as much sunlight as other areas of the country, so a solar system will produce less here than a system in a sunnier state, like Arizona. 

However, full retail net metering, utility rebates, and the federal tax credit more than make up for what the state lacks in sunshine.

Enter your details to calculate the cost and savings you are likely to get from installing solar panels for your home.

What you can learn from our state solar panel calculator

This solar calculator requires you to input your address, utility company, your average monthly power spend - it tells you:

If you want to see all of the above but also see live pricing, the three best solar deals available in your city and get binding quotes from each of these solar companies then use this Delaware solar panels calculator. This calculator requires you to also input your name and contact details because most of our 200+ installer partners will only authorize the sharing of their live solar pricing where we have validated that you are a real homeowner with a home in their service area. We respect the privacy of your data and only share your contact details with the solar companies you ask us to get binding quotes from.

Note: Please keep in mind that the best source of up-to-date information on incentives are the solar installers who specialize in your area.

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