Delaware Solar in 2026: The Honest Picture

Delaware homeowners face a significant shift in solar economics in 2026. The federal Residential Clean Energy Credit (Section 25D), which provided a 30% tax credit for residential solar installations, expired on December 31, 2025. Systems placed in service after that date no longer qualify. This means Delaware residents can no longer rely on the federal incentive that made solar affordable for millions of Americans over the past decade.

Delaware itself partially offsets this loss through two state-level programs: the Delaware Green Energy Program (a DNREC-administered grant funded by ratepayer surcharges and paid per watt of installed capacity by utility territory) and the Delaware Solar Renewable Energy Credit (SREC) market, which lets you sell the environmental attributes of your generation to load-serving entities meeting state RPS obligations. Delaware also exempts the added home value from solar installations from property tax assessment. Note that Delaware has no general state sales tax, so there is no “sales tax exemption” to claim, your purchase is simply not taxed. Combined with net metering from Delmarva Power & Light and other utilities, solar remains financially viable for most Delaware homeowners, though the payback period has lengthened to roughly 11 to 13 years now that the federal credit has expired.

This guide walks through current costs, realistic savings, available incentives, and what to expect when shopping for solar in Delaware in 2026.

Average Solar System Cost in Delaware (2026)

A typical 6 kW residential solar system in Delaware costs between $24,000 and $29,000 before incentives, or roughly $4.00 to $4.75 per watt. This aligns with national averages and reflects current equipment, labor, and permitting costs.

Cost breakdown for a 6 kW system:

  • Solar panels (18-22 panels): $8,000 to $10,000
  • Inverter and electrical equipment: $3,500 to $4,500
  • Labor and installation: $6,000 to $8,000
  • Permitting, inspection, and interconnection: $2,500 to $3,500
  • Monitoring and warranty: $1,500 to $2,500

After applying a typical Delaware Green Energy Program grant (which varies by utility but commonly runs $3,000 to $6,000 for a 6 kW residential PV system), the net cost drops to approximately $18,000 to $26,000. If you finance the system with a solar loan, you avoid the upfront cost but pay interest over the loan term (typically 10 to 15 years).

For current pricing in your area, consult the EnergySage cost benchmarks for Delaware.

Real Delaware Homeowner Savings (Sample Scenarios)

Savings depend on your location, roof orientation, electricity consumption, and utility rates. Here are four realistic examples:

Wilmington (Delmarva Power & Light, 6 kW system, $26,500 installed):

  • Green Energy Program grant: -$3,750
  • Net cost: $22,750
  • Annual electricity production: 7,200 kWh
  • Annual electricity cost avoided: $1,080 (at $0.15/kWh)
  • Annual SREC revenue: ~$280
  • 25-year savings: $22,500 (accounting for 2% annual rate increases)
  • Payback period: 12 years

Newark (Delmarva Power & Light, 6 kW system, $26,500 installed):

  • Green Energy Program grant: -$3,750
  • Net cost: $22,750
  • Annual electricity production: 7,400 kWh
  • Annual electricity cost avoided: $1,110
  • Annual SREC revenue: ~$290
  • 25-year savings: $23,500
  • Payback period: 11.5 years

Dover (Delmarva Power & Light, 5 kW system, $22,000 installed):

  • Green Energy Program grant: -$3,125
  • Net cost: $18,875
  • Annual electricity production: 6,000 kWh
  • Annual electricity cost avoided: $900
  • Annual SREC revenue: ~$235
  • 25-year savings: $19,500
  • Payback period: 12.5 years

Georgetown (Delaware Electric Cooperative, 6 kW system, $26,500 installed):

  • Green Energy Program grant (DEC territory rate): -$1,500
  • Net cost: $25,000
  • Annual electricity production: 7,100 kWh
  • Annual electricity cost avoided: $1,065 (at $0.15/kWh)
  • Annual SREC revenue: ~$275
  • 25-year savings: $20,500
  • Payback period: 13.5 years

These estimates assume average roof conditions, no shading, and stable electricity rates. Actual results vary based on your specific home and usage patterns.

Delaware Solar Incentives Still Available in 2026

Delaware Green Energy Program (DNREC Grant)

Delaware does not offer a state income tax credit for residential solar. The primary state-level cash incentive is the Delaware Green Energy Program, administered by the Department of Natural Resources and Environmental Control (DNREC) and funded through a small surcharge on electricity bills. Each utility territory (Delmarva Power & Light, Delaware Electric Cooperative, City of Wilmington, and the Delaware Municipal Electric Corporation member towns) has its own program, application process, and per-watt grant rate, but the total grant for a residential PV system is generally capped near $6,000.

Delmarva and Wilmington territories typically pay the most generous per-watt rates; cooperative and municipal customers should confirm current rates directly with their utility or DNREC before signing a contract. Your installer should handle the grant application as part of the project.

Delaware SREC Market

Delaware operates a compliance Solar Renewable Energy Credit (SREC) market under the state Renewable Portfolio Standard. Each megawatt-hour your system generates creates one SREC that you can sell to retail electricity suppliers obligated to meet the solar carve-out. Prices fluctuate by auction, but recent clearing prices have ranged roughly $30 to $50 per MWh. A 6 kW system producing 7,200 kWh per year generates about 7.2 SRECs annually, worth $215 to $360 at current prices. Most homeowners contract with an SREC aggregator (your installer can typically refer one) rather than selling individually.

Property Tax Exemption

Delaware law exempts the added home value from solar installations from property tax assessment. If your home value increases by $25,000 due to solar, your property tax bill will not reflect that increase. This exemption applies indefinitely and requires no application; it is automatic upon system completion.

No State Sales Tax

Delaware does not levy a general state sales tax, so solar equipment and installation labor are not taxed at the point of purchase. This is a structural feature of Delaware’s tax system rather than a solar-specific exemption, and it gives Delaware buyers a built-in 5% to 7% advantage compared to buyers in states like Maryland, Pennsylvania, and New Jersey.

Net Metering

Delmarva Power & Light, which serves most of Delaware, offers net metering on a 1:1 basis. Excess solar generation is credited at the full retail electricity rate, not a reduced “avoided cost” rate. This means if you generate 500 kWh in a month and use 400 kWh, you receive a $15 credit (at $0.15/kWh) on your next bill. Delaware Electric Cooperative also participates in net metering.

Net metering is essential to solar economics in Delaware. Without it, payback periods would extend significantly.

Utility Rebates and Programs

Delmarva Power & Light occasionally offers rebates or demand-side management programs for solar customers. Check with your utility directly for current offerings. The DSIRE database maintains a comprehensive list of all active state and local incentives.

Federal Section 48E (Third-Party Lease Option)

If you cannot finance a system outright or prefer not to, a third-party-owned solar lease may still qualify for a federal investment tax credit under Section 48E. However, construction must have begun before July 4, 2026. Lease payments are typically 10% to 30% lower than ownership, but you do not own the system or claim state tax credits. This option is narrowing as the July 2026 deadline approaches.

Is Solar Worth It in Delaware Without the Federal Credit?

The loss of the federal Section 25D credit makes solar less attractive than it was in 2024 and 2025, but it remains a sound investment for most Delaware homeowners. Here is the decision framework:

Solar makes financial sense if:

  • You plan to stay in your home for at least 11 to 13 years (the payback period).
  • Your roof is in good condition and receives at least 4 to 5 hours of direct sunlight daily.
  • Your electricity rate is $0.13/kWh or higher (Delaware averages $0.15/kWh).
  • You can finance the system with a loan or pay cash without straining your budget.

Solar is less attractive if:

  • You plan to move within 8 to 10 years.
  • Your roof is heavily shaded or faces north.
  • Your electricity rate is below $0.12/kWh (unlikely in Delaware).
  • You cannot qualify for financing or prefer to avoid debt.

The Green Energy Program grant, SREC revenue, and property tax exemption together reduce your net cost and ongoing carrying cost, but they do not fully replace the lost federal credit. A 6 kW system that cost roughly $18,500 after the federal credit in 2025 now costs approximately $22,750 after a typical Delmarva Green Energy Program grant in 2026. That extra $4,250 extends payback by roughly three years compared to 2024-25 conditions.

For most Delaware homeowners with moderate to high electricity consumption, the 11 to 13 year payback is acceptable, especially given the 25+ year lifespan of modern solar panels.

Top Cities for Solar in Delaware

  • Wilmington: Largest city, good solar irradiance (4.2 kWh/m2/day), served by Delmarva Power & Light with net metering. Average payback: 12 years.
  • Newark: Home to University of Delaware, similar irradiance to Wilmington, strong net metering support. Average payback: 11.5 years.
  • Dover: State capital, slightly lower irradiance due to more cloud cover, but still viable. Average payback: 12.5 years.
  • Claymont: Northern Delaware, good irradiance, served by Delmarva Power & Light. Average payback: 11.5 years.
  • Rehoboth Beach: Coastal city, slightly higher irradiance due to ocean reflection, popular for residential solar. Average payback: 11 years.
  • Georgetown: Southern Delaware, served by Delaware Electric Cooperative, good solar resource but smaller Green Energy Program grant. Average payback: 13.5 years.

Solar irradiance across Delaware averages 4.2 kWh/m2/day, which is moderate compared to sunnier states but sufficient for cost-effective solar. For detailed solar resource maps, see the NREL solar resource database.

What to Look for in a Delaware Solar Installer

  1. Delaware License and Insurance: Verify the installer holds a valid Delaware contractor license and carries general liability and workers’ compensation insurance. Check the Delaware Division of Professional Regulation database.

  2. Net Metering Expertise: The installer should understand Delaware’s net metering rules and be able to explain how excess generation will be credited. They should have experience interconnecting with Delmarva Power & Light and Delaware Electric Cooperative.

  3. State Incentive Knowledge: The installer should be able to walk you through the Delaware Green Energy Program grant (and handle the application for you), the Delaware SREC market and aggregator referrals, and the property tax exemption. Be wary of any installer who references a “Delaware Solar Energy Tax Credit,” a “10% state credit,” or a “sales tax exemption.” None of those exist in Delaware.

  4. Permitting and Interconnection: The installer should handle all permitting with your local jurisdiction (Wilmington, Dover, etc.) and utility interconnection. Ask how long this typically takes and what happens if there are delays.

  5. Equipment Quality and Warranty: Verify that panels carry a 25-year performance warranty and the inverter carries at least a 10-year warranty. Ask about the installer’s warranty on labor and workmanship (typically 5 to 10 years).

  6. References and Reviews: Request at least three local references from systems installed in the past 12 months. Check Google, Yelp, and the Better Business Bureau for reviews. Look for patterns of customer satisfaction, not just isolated complaints.

  7. Financing Options: The installer should offer multiple financing paths: cash purchase, solar loans, leases, or power purchase agreements (PPAs). They should explain the pros and cons of each and help you choose based on your situation.

Next Steps for Delaware Homeowners

The best way to compare costs and incentives is to request free quotes from multiple installers. Most Delaware installers offer free site assessments and custom quotes within 24 to 48 hours.

When requesting quotes, provide:

  • Your recent electricity bills (12 months) to show usage and rates.
  • Photos of your roof and its orientation.
  • Your address and utility provider.
  • Your preferred financing method (cash, loan, lease).

Ask each installer to itemize the cost, show the Green Energy Program grant, SREC revenue assumptions, and property tax exemption in writing, and provide a timeline from quote to system activation.

Compare not just price but also warranty, equipment quality, and customer service. The cheapest quote is not always the best value if the installer has poor reviews or uses low-quality equipment.

Want solar power without the installer process at all? A solar generator pairs portable panels with a battery in one box that ships to your door — no permits, no roof work, no sales calls. See our Delaware backup power guide for the sizes that fit Delaware homes and outage risks.

Sources for 2026 data: IRS Section 25D guidance, DSIRE state incentive database, Delaware Department of Natural Resources and Environmental Control (DNREC) Green Energy Program, Delaware Public Service Commission SREC filings, Delaware Division of Professional Regulation, Delmarva Power & Light, Delaware Electric Cooperative, SEIA state market data, NREL solar resource maps, EnergySage cost benchmarks.