Sunwise Energy installs residential and commercial solar in Wilmington, Delaware’s largest city and the New Castle County seat. Delmarva Power rates continue to climb, and Delaware’s incentive stack, including a $6,000 Green Energy rebate and zero sales tax, makes Wilmington one of the strongest solar markets in the tri-state area. From Forty Acres rowhomes to Highlands colonials, solar paired with SRECs, full retail net metering, and $0-down financing gives homeowners a real path to energy independence.
| Detail | Value |
|---|---|
| Utility | Delmarva Power |
| Rate Trend | Rising: 3rd base increase in 5 years, 7% supply increase June 2026 |
| DE Green Energy Rebate | $0.70/watt, up to $6,000 |
| DE SRECs | ~$30/credit (years 1-10), ~$10/credit (years 11-25) |
| Net Metering | Full retail rate with annual payout option |
| Sales Tax | Zero state sales tax (DE has no sales tax) |
| Equipment | Premium panels + microinverters |
| Permitting | City Dept. of Land Use & Planning |
| Installer | Sunwise Energy, in-house crews, licensed in DE/PA/NJ |
Delmarva Power has implemented its third base rate increase in five years, with a 7 percent supply cost increase scheduled for June 2026. Wilmington’s dense housing stock (rowhomes, twins, and detached homes) is well suited for solar when designed by a team that knows how to work with compact roof areas and older construction. Delaware’s incentive stack is strong: Green Energy rebate, SRECs, and full retail net metering through Delmarva Power. Unlike neighboring Pennsylvania, Delaware charges zero sales tax on solar equipment purchases. For business owners, the federal Investment Tax Credit remains available through July 4, 2026.
From Forty Acres rowhomes to downtown corporate offices, Sunwise designs systems for Wilmington’s real built environment.
Wilmington’s housing ranges from brick rowhomes and twins in Forty Acres, Little Italy, and Cool Spring to larger detached homes in the Highlands and Wawaset Park. High-efficiency panels and microinverters maximize production on every roof type, from compact attached homes to open residential lots.
Wilmington is Delaware’s corporate capital, with a significant concentration of financial services, legal, and healthcare employers. All are strong candidates for commercial solar. The federal ITC is available through July 4, 2026.
Pairing solar with a battery keeps your home running during Delmarva Power outages and maximizes every kilowatt-hour your system produces. If your roof needs work first, Sunwise bundles roofing and solar into a single project, especially valuable for Wilmington’s older housing stock.
A Sunwise energy specialist reviews your Delmarva Power billing history, roof condition, and sun exposure to design a system sized to your actual consumption.
We create a custom system design and handle all permitting through Wilmington’s Department of Land Use and Planning at the Redding City/County Building, including any historic district coordination.
Our in-house crews complete residential systems in less than a ay on roof using premium panels and microinverters, handling all electrical work, racking, and wiring to meet Delaware code.
Sunwise coordinates your Delmarva Power interconnection and meter swap. Once Delmarva grants Permission to Operate, your system goes live, producing power, earning net metering credits, and generating SRECs.
During your visit, a Sunwise Energy Specialist will:
A consultation is free, pressure-free, and designed to help you understand whether solar truly makes sense for your home.
Sunwise Energy installs solar across all of Wilmington, from the Brandywine to the Christina riverfront. Wilmington's diverse housing stock and strong sun exposure support solar on nearly every roof type.
Two of Wilmington's most popular neighborhoods, featuring a mix of brick rowhomes, twins, and townhouses dating to the 1860s and later. Forty Acres is Delaware's first Neighborhood Conservation District. Compact roof areas benefit from high-efficiency panel layouts, and the walkable character of these neighborhoods means minimal tree shading on many blocks.
Wilmington's most upscale residential neighborhoods, featuring large single-family homes, some over a century old, on broad tree-lined streets near Rockford Park and Brandywine Park. Larger homes with higher energy consumption support strong solar economics. The Highlands' mature tree canopy benefits from careful shade analysis during system design.
Historic neighborhoods with dense rowhome stock in Italianate, Victorian, and Colonial Revival styles. Cool Spring is a designated city historic district. Rising Delmarva Power rates make solar increasingly attractive for homeowners across these compact neighborhoods.
Wilmington's business and government center, featuring the Rodney Square financial district, commercial office buildings, and mixed-use properties. Downtown's commercial and institutional buildings are strong candidates for commercial solar, and residential properties on the edges of Center City support rooftop installations.
A revitalized mixed-use district along the Christina River, featuring townhome developments like Christina Landing and Justison Landing alongside commercial and entertainment properties. Newer construction in the Riverfront area features modern roof systems well suited for solar.
A range of residential neighborhoods with smaller rowhomes, detached homes, and the planned community of Bellevue Park. These neighborhoods offer strong solar opportunity, and $0-down financing paired with Delaware's incentive stack makes solar accessible for homeowners across the east side.
We also provide solar installation throughout the broader Delaware and tri-state service area.
The cost of a solar system in Wilmington depends on your home’s energy usage, roof size, and complexity. Delaware’s incentive stack significantly reduces the effective cost: the Green Energy Program rebate provides $0.70 per watt up to $6,000, SRECs generate approximately $30 per credit for years 1 through 10, Delmarva Power supports full retail net metering, and Delaware has no state sales tax on equipment. $0-down financing is available, so many homeowners go solar with no upfront cost. A free Sunwise consultation will give you an exact system design and cost breakdown specific to your home. Commercial property owners can also take advantage of the federal Investment Tax Credit through July 4, 2026.
Wilmington issues solar permits through the City’s Department of Land Use and Planning at the Louis L. Redding City/County Building, 800 N. French Street, 3rd Floor. Projects in a city historic district or neighborhood conservation district may require additional preservation review. Sunwise handles the entire permit application and inspection process on your behalf, so you don’t need to visit the building or manage any paperwork.
Yes. Rowhomes and twins are the dominant housing type in Wilmington, and solar works well on them. Neighborhoods like Forty Acres, Little Italy, Cool Spring, and the Triangle are full of attached homes producing solar energy today. System size may be smaller due to roof area, but high-efficiency panels maximize production per square foot. Sunwise designs systems specifically for compact roofs.
Delmarva Power is the sole electric utility for Wilmington, and residential rates have been climbing steadily. The utility has implemented its third base rate increase in five years, with a 7 percent supply cost increase scheduled for June 2026. Solar locks in a fixed energy cost and protects you from continued rate increases.
Wilmington homeowners can access four key Delaware solar incentives: the Green Energy Program rebate ($0.70/watt, up to $6,000), SRECs (~$30/credit for years 1-10, ~$10/credit for years 11-25), full retail net metering through Delmarva Power with an annual payout option, and zero state sales tax on all equipment. Unlike neighboring Pennsylvania, Delaware’s zero sales tax applies to all solar equipment purchases. $0-down financing is also available.
Yes. Much of Wilmington’s housing dates to the late 1800s and early 1900s, and these older homes are excellent solar candidates as long as the roof is in good condition. Sunwise performs a full roof and shade assessment before designing your system. If your roof needs replacement first, we bundle roofing and solar into a single project. Homes in Wilmington’s designated historic districts may need coordination with the city’s preservation review process, though most residential solar installations proceed without issue.
Schedule a free consultation with a Sunwise Energy Specialist. We’ll assess your home, design a custom system, and walk you through your savings with a dedicated in-house team from start to finish.
$0-down financing, loan, and lease options available. NJ's SuSI program ($85/MWh for 15 years), property tax exemption, and sales tax exemption make going solar more affordable than ever.
