Wilmington, Delaware Solar Panel Cost: Savings and Payback (May 2026)

Installing a 5 kW solar panel system on your Wilmington home can cost about $15,950. Solar panel systems are measured by kW production, and the average system costs about $3,190 per kW of installed capacity. Looked at another way, you'll pay about $3.19 per watt for installation.

That said, our data shows an 8 kW system is the best size for Wilmington residents. This is because people in Wilmington consume 896 kWh per month of energy. The average electric bill is $130.44 per month with an average price of 14.56c per kWh. Considering this average, the right solar panel system has the potential to save you money in Wilmington.

Are solar panels worth it in Wilmington?

Let's take a closer look at whether solar panels are worth it. To figure this out, you'll want to compare your estimated savings after solar to what you'd pay in energy without solar panels.

The payback period is the amount of time until you break even on your investment considering savings from energy bills. And the net 20-year savings is what you save over 20 years minus the upfront costs. Considering energy prices tend to rise over time, it's usually worth it to get solar panels if you can get a good installation price.

What's the best solar system size in Wilmington, Delaware?

To find out the right size of the solar system for your home, consider your energy usage, local sun hours, and available roof space. Here's what the average solar potential looks like in Wilmington:

• Roof size: 589.9 sq. ft.
• System capacity: Up to 9,875.996 kW DC
• Electricity production: About 1,474.758 kWh AC per year

The goal with solar panels is to find the sweet spot where you generate the electricity you need and can save enough energy costs to recoup your investment in a reasonable time.

Below you can see power generation, cost, and savings of different system sizes.

How to pay for solar panels in Wilmington, Delaware

Purchasing solar panels is no small task. Here are a few ways you can pay for solar:

• Cash purchase: This is the best choice if you can afford it. Paying in cash gives you the best long-term savings but requires a larger upfront investment, of course.
• Solar loans: You can spread the cost over time with a loan, but be mindful of interest rates and loan terms.
• Solar leases and PPAs: Power purchase agreements (PPA) and leases have lower upfront costs. However, you don't own the system, which means you save the least over time. There can also be complications if you want to sell your home.

What affects the cost of solar panels in Wilmington?

Several factors impact the final price of your solar installation:

• System size: Larger systems cost more upfront but often yield greater long-term savings.
• Panel type and efficiency: Monocrystalline panels are generally more efficient and expensive than polycrystalline or thin-film options.
• Installation complexity: Roof type, shading, and site-specific challenges can increase installation costs. Permitting and inspection fees also factor in.
• Additional considerations: Battery storage adds to the initial investment but provides backup power and greater energy independence. Labor and installation quality are also essential cost considerations.

How to save on Wilmington, DE solar panel costs

Getting the most bang for your buck is essential when investing in solar. Here are some strategies to save money:

• Shop around for quotes: Get quotes from multiple installers to compare pricing and services. Don't just focus on the lowest price; consider reputation, experience, and warranty.
• Consider system size: Be careful of going overboard. A properly sized system will meet your energy needs without unnecessary costs. Analyze your energy usage to determine the optimal size.
• Explore financing options: Compare loan interest rates and terms carefully. If considering a lease or PPA, understand the long-term implications and potential trade-offs. Cash purchases often offer the best long-term savings.
• Negotiate with installers: Don't be afraid to negotiate on price. Inquire about any discounts or promotions they may offer.
• Optimize your home's energy efficiency: Before going solar, improve your home's energy efficiency. This will reduce your overall energy consumption and potentially allow you to install a smaller, less expensive solar system. Simple steps like sealing air leaks and upgrading appliances can make a difference.
• DIY (if possible and permitted): While professional installation is generally recommended, some homeowners may be able to handle certain tasks themselves (like site preparation). Check your local regulations and be honest about your abilities.
• Ask about rebates and incentives: Many states, cities, and utility companies offer rebates, net metering, and other incentives. Check with your local utility and city/county for any available programs.
• Time your installation: Sometimes, installers offer discounts during slower periods. Inquiring about seasonal promotions might yield savings.

Delaware-specific solar considerations

• Weather Impacts: In Delaware, the climate is pretty moderate, so while you won't get the extreme sun of the Southwest, you'll still enjoy enough consistent sunlight for steady solar production. Just be aware of occasional storms that might call for more rugged system components.
• Regulatory and Legal Considerations: Local jurisdictions in Delaware enforce building codes and permits rigorously. It pays to check in advance about any community or HOA rules that might affect where and how your panels are installed.