Delaware Solar Incentives 2026: DNREC Green Energy Program Guide

Delaware is a small state with a surprisingly strong solar story: no sales tax on anything (not just solar panels — nothing), an active SREC market through PJM-GATS, DNREC's Green Energy Program rebates, and retail-rate net metering protected by state law. For homeowners in the Wilmington, Newark, Dover, or Rehoboth Beach areas, the combination of these incentives can produce a 7–10 year payback period — faster than the national median.

This guide explains every Delaware solar incentive available in 2026, how to stack them correctly, and how the state compares to its Mid-Atlantic neighbors.

Delaware Solar Incentives at a Glance

Incentive	Type	Value
Federal ITC	Tax credit	30% of gross system cost
DNREC Green Energy Program	Upfront rebate	$250–$2,500 residential
Delaware SREC market	Ongoing income	~$25–$60/SREC/year
Sales tax exemption	Structural	0% (Delaware has no sales tax)
Property tax exemption	Exemption	Full for 9 years (§9-2308)
Net metering	Rate mechanism	Retail rate via PSC

The 30% Federal Investment Tax Credit

Delaware solar buyers receive the same 30% federal ITC available nationwide. For a typical Delaware residential system:

System Size	Gross Cost	ITC (30%)	Net Cost After ITC
6 kW	$18,600	$5,580	$13,020
8 kW	$24,800	$7,440	$17,360
10 kW	$31,000	$9,300	$21,700
12 kW	$37,200	$11,160	$26,040

Estimates based on Delaware's typical installed cost of $3.10/W (slightly above the national median of $3.00/W due to smaller market volume and fewer large installers).

The ITC reduces your federal tax liability, not the system price directly. Your tax preparer claims it using IRS Form 5695. If your tax liability in year one is less than 30% of the system cost, you carry the unused portion forward to year two. See the complete federal ITC guide for full details.

DNREC Green Energy Program

The Delaware Department of Natural Resources and Environmental Control (DNREC) administers the Green Energy Program, which provides upfront rebates for residential and small commercial solar installations. The program uses the Clean Energy Fund, funded by customer electric bills via a rider on Delmarva Power, Delaware Electric Cooperative (DEC), and RECS (Rockland Electric) bills.

2026 Rebate Structure

Standard residential rebate: $0.25/W, up to $2,500 total.

An 8 kW system = $0.25 × 8,000 W = $2,000
A 10 kW system = $0.25 × 10,000 W = $2,500 (maximum)

Income-qualified enhancement: Households at or below 80% of area median income (AMI) receive an enhanced rate.

Enhanced rebate: $0.50/W, up to $5,000 total
Income-qualified buyers in Wilmington (New Castle County median ~$95,000; 80% AMI = ~$76,000) should always check eligibility before applying

How to Apply

Get a minimum of two quotes from DNREC-registered contractors (the installer must be registered; check the DNREC website for the current registered contractor list)
Submit your application to DNREC before installation (applications are reviewed on a first-come, first-served basis against available program funding)
Install the system within 180 days of approval
Submit the final commissioning documentation to receive the rebate check

Timing note: The Green Energy Program is subject to annual funding appropriations. Capacity can be exhausted mid-year — submit your application early in the calendar year for best chance of funding. DNREC publishes the current available capacity on its website.

The ITC is calculated on the gross system cost before the DNREC rebate reduces your basis. This is favorable: a $24,800 system receives a $7,440 ITC even if you also receive a $2,000 DNREC rebate. Your rebate income is taxable, but the ITC is calculated pre-rebate.

Delaware SREC Market

Delaware's Renewable Portfolio Standard (RPS) under Title 26, Chapter 1 of the Delaware Code requires that 25% of electricity sold in the state by 2025-2026 come from renewable sources, with 3.5% specifically from solar (the "solar carve-out"). This creates demand for Solar Renewable Energy Certificates (SRECs).

Each 1,000 kWh your system produces generates one SREC, which can be sold to utilities that need to meet the solar carve-out. Delaware is connected to the PJM-GATS tracking system, which means Delaware SRECs trade on the same Mid-Atlantic market as New Jersey, Maryland, and Pennsylvania certificates.

2026 SREC Prices for Delaware Systems

Delaware SRECs generally trade at a discount to NJ and MD certificates because the Delaware RPS demand is smaller. Current price range: $25–$60/SREC.

For a Delaware 8 kW system producing 9,200 kWh/year:

Annual SRECs generated: ~9.2 SRECs
At $40/SREC: $368/year in SREC income
Over 10 years: ~$3,680 (assuming flat prices; prices fluctuate with RPS demand)

How to Sell Delaware SRECs

Register your system with PJM-GATS (your installer typically handles this during commissioning)
Once registered, SRECs accrue monthly (1 SREC per 1,000 kWh)
Sell via brokers (SRECTrade, Flett Exchange, Sol Systems) or directly to utilities

SREC prices are volatile — they depend on how much solar has been installed statewide relative to the RPS obligation. Check current market prices via SRECTrade.com before making assumptions about long-term income.

Delaware's Natural Sales Tax Advantage

Delaware is one of only five U.S. states with no state sales tax (alongside Montana, New Hampshire, Oregon, and Alaska). You pay zero sales tax on solar panels, inverters, racking, and all other equipment — not because solar is exempt, but because nothing in Delaware is taxed at point of sale.

This saves 5–9% vs. neighboring states:

vs. Maryland: 6% sales tax (exempted for solar, but relevant for comparison)
vs. Pennsylvania: 6% sales tax (no solar exemption — PA buyers pay full sales tax)
vs. New Jersey: 6.625% sales tax (exempted for solar)
vs. New York: 4–8.875% sales tax (exempted for solar)

For a $24,800 gross system cost, the absence of sales tax saves $1,240–$2,232 vs. a comparable system in a 5–9% tax state.

Property Tax Exemption

Delaware law (Title 9, §9-2308) provides a property tax exemption for residential solar systems. The exemption covers the full assessed value added by the solar installation for 9 years from the date of installation.

What This Saves Delaware Buyers

Delaware property tax rates vary by county and municipality:

New Castle County: ~0.60–0.85% effective rate
Kent County: ~0.50–0.65%
Sussex County: ~0.30–0.45%

For an 8 kW system adding $12,000–$16,000 in assessed value to a Wilmington home (New Castle County at 0.80%):

Annual property tax saved: $96–$128/year
Over 9 years: $864–$1,152 cumulative savings

The exemption is less valuable in Delaware than in states with higher property tax rates (Wisconsin's 1.61% rate makes the property tax exemption worth far more per dollar of added value), but it is real and worth noting.

Net Metering in Delaware

How Delaware Net Metering Works

Delaware's Public Service Commission (PSC) mandates retail-rate net metering for all investor-owned utilities under 26 Del. C. §363. The current key utilities serving Delaware:

Delmarva Power (an Exelon/Pepco Holdings company): Serves most of New Castle County (Wilmington, Newark, Middletown) and parts of Kent and Sussex counties. Retail-rate net metering up to 25 kW for residential systems. Credits roll month-to-month at retail rate; at the end of the annual true-up period (April 1), excess credits are forfeited or purchased at the avoided-cost rate (~$0.04–$0.06/kWh).

Delaware Electric Cooperative (DEC): Serves most of Sussex County (rural areas, beach communities including Rehoboth Beach, Bethany Beach, Lewes). Net metering available under SB 106 compliance; retail rate credited. DEC is a not-for-profit cooperative, so rate structures are somewhat different from Delmarva Power. Verify current DEC net metering tariff before sizing.

Rockland Electric (RECS): Serves a small area in northern Delaware. Retail-rate net metering under PSC mandate.

Sizing Implication

The annual true-up at avoided cost means you should not oversize your system to generate excess exports. An 8 kW system that produces 10,400 kWh/year but your household uses only 9,000 kWh/year will export 1,400 kWh — worth $0.12/kWh during the year but only $0.05/kWh at the April true-up. Design your system to offset approximately 90–100% of annual consumption, not 110–120%.

Energy Community ITC Adder

The Inflation Reduction Act created an additional 10% ITC bonus for solar systems installed in qualifying Energy Community census tracts (former coal communities, brownfield sites, or communities with high fossil fuel employment). Delaware has limited Energy Community eligibility — the state never had significant coal mining or fossil fuel production.

Check the IRS Interactive Energy Community Maps for the specific census tract of your address. If your property qualifies, your effective ITC is 40% rather than 30%.

Full Incentive Stack: Two Delaware Examples

Example 1: Wilmington (New Castle County) — Delmarva Power Territory

Household profile: 10,000 kWh/year usage, Delmarva Power at $0.125/kWh average rate

Proposed system: 8 kW (20 × 400W panels), $24,800 gross

Incentive	Amount
Federal ITC (30%)	−$7,440
DNREC Green Energy rebate ($0.25/W)	−$2,000
Year 1–10 SREC income ($40/SREC × ~9.2/yr)	−$3,680 (10-yr)
Property tax exemption (9 yr × $128/yr)	−$1,152 (9-yr)
Net system cost after ITC + rebate	$15,360
Net cost with all incentives over 10 yr	$10,528

Annual savings: ~9,200 kWh × $0.125/kWh = $1,150/year

Simple payback (ITC + rebate only): $15,360 ÷ $1,150 = ~13.4 years

Payback with SREC income included: ($1,150 + $368)/year = $1,518/year → **10.1 years**

Note: Delaware's electricity rates ($0.125/kWh) are lower than Massachusetts ($0.24/kWh), Rhode Island ($0.25/kWh), or Connecticut ($0.23/kWh) — which is why Delaware payback periods are longer despite strong incentives. The DNREC rebate and SREC income are essential to a reasonable payback.

Example 2: Sussex County — Delaware Electric Cooperative Territory

Household profile: 12,000 kWh/year usage (larger home, higher A/C load), DEC at $0.115/kWh

Proposed system: 10 kW, $31,000 gross

Incentive	Amount
Federal ITC (30%)	−$9,300
DNREC Green Energy rebate ($0.25/W, max $2,500)	−$2,500
SREC income ($40/SREC × ~11.5/yr × 10 yr)	−$4,600 (10-yr)
Property tax exemption (9 yr × $75/yr, low Sussex rate)	−$675 (9-yr)
Net system cost after ITC + rebate	$19,200
Net cost with all incentives over 10 yr	$13,925

Annual savings: ~11,500 kWh × $0.115/kWh = $1,323/year

Simple payback (ITC + rebate only): $19,200 ÷ $1,323 = ~14.5 years

Payback with SREC income included: ($1,323 + $460)/year → ~10.8 years

Sussex County's lower electricity rates and property tax rates make it slightly less favorable than New Castle County, but the DNREC rebate maximum ($2,500 for a 10 kW system) is the same in both territories.

Delaware vs. Mid-Atlantic Neighbors

Feature	Delaware	Maryland	New Jersey	Pennsylvania
State income tax credit	None	None	None	None
State rebate program	DNREC $0.25/W (max $2,500)	None (MEA income-qualified only)	None	None
SREC market	Yes ($25–$60/SREC)	Yes ($60–$90/SREC)	Yes ($185–$270/SREC)	Yes ($25–$50 AEC)
Property tax exemption	9-year full exemption	Permanent	Permanent	None statewide
Sales tax exemption	0% (no sales tax)	6% exempted	6.625% exempted	No exemption (6% applies)
Net metering	Retail rate (Delmarva, DEC)	Retail rate	Retail rate	Retail rate

Delaware's strongest relative advantage over Pennsylvania is the absence of sales tax (PA buyers pay full 6% sales tax on solar equipment — a cost of $1,500–$2,000 on a typical system that DE buyers avoid automatically). Delaware's SREC prices are lower than NJ or MD, but the DNREC rebate partially offsets this.

Low-Income Programs

DNREC Green Energy Income-Qualified Rebate: As noted above, households at or below 80% AMI can receive $0.50/W, up to $5,000. This doubles the standard rebate.

USDA REAP: Delaware agricultural producers and rural small businesses may qualify for the Rural Energy for America Program (REAP), which provides 25–50% grants for renewable energy systems. Delaware has significant poultry and grain farming operations; farm solar installations with REAP grants can achieve 3–5 year payback periods. See the solar grants guide for full REAP program details.

Weatherization Assistance Program (WAP): Low-income Delaware households may be eligible for free home energy efficiency improvements through WAP, which can include electrical service upgrades that improve solar installation readiness.

Delaware Solar Application Process

The typical Delaware solar installation follows this timeline:

Get quotes (2–3 weeks): Request proposals from 2–3 DNREC-registered installers. Compare using our how to read a solar quote guide.
Submit DNREC application (before installation): Your installer files the Green Energy Program application on your behalf. Wait for written DNREC approval before proceeding.
Sign contract and permit (2–4 weeks): County or city building permit required. New Castle County and the city of Wilmington each have separate permit offices.
Installation (1–2 days for typical residential): Physical installation is fast; the process is in the permitting and interconnection steps.
Utility interconnection (4–8 weeks for Delmarva; sometimes faster for DEC): Delmarva Power processes interconnection applications within 30 days for systems ≤10 kW under streamlined review; larger systems take longer.
Permission to Operate (PTO) and DNREC final inspection: Submit completion paperwork to DNREC to receive the rebate.

Total typical timeline: 4–6 months from contract to active solar. See the solar installation timeline guide for a full phase-by-phase breakdown.

Should You Go Solar in Delaware?

Delaware solar makes sense for homeowners who:

Consume 8,000+ kWh/year (lower usage = smaller system = lower DNREC rebate)
Are served by Delmarva Power or DEC (both have retail-rate net metering)
Qualify for the income-enhanced DNREC rebate (at or below 80% AMI)
Own their home and plan to stay 10+ years (payback periods are longer than NJ or MA)
Have south- or southwest-facing roof space without major shading

Solar may be less compelling for Delaware households with:

Very low electricity usage (<6,000 kWh/year)
Heavy shading from trees or neighboring structures
Plans to move within 5 years

Delaware's 7–10 year payback period (with full incentive stack) is longer than New Jersey (3–5 years with SREC II), Rhode Island (5–7 years), or Connecticut (3–5 years with RSIP) — but it's reasonable compared to states with no state incentive programs.

Key Resources

DNREC Green Energy Program: dnrec.delaware.gov/energy/green-energy-fund/
Delaware PSC net metering rules: depsc.delaware.gov
PJM-GATS SREC registration: gats.pjm-eis.com
DSIRE Delaware incentives: dsireusa.org (filter by Delaware)

For context on how Delaware compares to neighboring markets, see: Maryland solar incentives guide, New Jersey solar incentives guide, Pennsylvania solar incentives guide, and Virginia solar incentives guide.

Use our free Solar System Designer to size a system for your Delaware home based on your state's peak sun hours and your monthly electricity usage — then bring that output to installer conversations as a baseline for evaluating proposals.