☀️ Delaware Solar Calculator 2026

🔍 Delaware Solar Quick Facts (2026)

Why Consider Solar in Delaware? (2026 Analysis)

Delaware has a unique solar profile — moderate sun hours, but higher-than-average electricity rates and a SREC (Solar Renewable Energy Credit) market that adds meaningful income for solar owners. Here's the full picture:

1. Higher electricity rates — good for solar payback

Delaware's average electricity rate ($0.155/kWh) is about 10% above the U.S. average (EIA 2025). This means each kWh of solar production saves you more money than in low-rate states like North Dakota or Washington. Higher rates = faster payback.

2. SREC market adds income

Delaware is part of the Regional Greenhouse Gas Initiative (RGGI) and has a SREC market. Solar system owners can earn SRECs (Solar Renewable Energy Credits) for every MWh of electricity their system produces. In Delaware's SREC market, each credit is worth $15–$35 (market price fluctuates). For a 6 kW system producing 7,000 kWh/year, that's an additional $105–$245/year in SREC income.

3. Strong net metering law

Delaware has a state law requiring net metering for all utilities. Key details:

• Full retail rate credit for excess generation (you get the same rate you pay)
• Systems up to 50 kW qualify for net metering (covers virtually all residential installations)
• Annual true-up (credits roll over month-to-month, settled once per year)

4. Federal tax credit covers 30%

The 30% Federal Investment Tax Credit (ITC) applies to Delaware solar installations through 2032. For a $28,000 system (before incentives), that's $8,400 back as a tax credit.

5. Delaware's Green Energy Program rebates

Delaware offers state rebates for solar installations through the Green Energy Program (administered by the Delaware Sustainable Energy Utility, or SEU). Rebates are typically $2,000–$4,000 depending on system size and available funding. Check with the SEU for current offerings.

💡 Delaware Solar Incentives & Rebates (2026)

Delaware Net Metering Law

Delaware's net metering law (26 Del. C. § 1001 et seq.) requires all utilities to offer net metering. This is stronger than voluntary utility programs. Key protections:

• Full retail rate credit (your excess solar generation offsets grid electricity at the same rate)
• System size up to 50 kW (covers all residential systems)
• Annual true-up (credits roll over month-to-month)

Green Energy Program (SEU) Rebates

Delaware's Sustainable Energy Utility (SEU) administers the Green Energy Program, which provides rebates for solar installations. Current rebates (subject to funding availability):

• Solar PV systems: up to $2,000–$4,000 (depending on system size and funding cycle)
• Application must be submitted before installation (check SEU website for current cycles)

SREC Market (Solar Renewable Energy Credits)

Delaware's Renewable Energy Portfolio Standard (REPS) requires utilities to source a portion of electricity from solar. This creates demand for SRECs. As a solar owner, you can sell your SRECs to utilities that need to meet their REPS requirements. Current market price: $15–$35 per SREC. A 6 kW system typically generates 6–8 SRECs per year (1 SREC = 1 MWh = 1,000 kWh).

Federal Tax Credit (ITC) — 30% Through 2032

Delaware solar customers can claim 30% of total system cost as a federal tax credit, including equipment, installation, permitting, and battery storage.

Delaware Property Tax Exemption

Delaware offers a property tax exemption for renewable energy systems, meaning your solar installation will not increase your property tax assessment.

🏢 Case Study: Typical Delaware Home (Wilmington)

Location: Wilmington, DE
System size: 6 kW (18 × 350W panels)
Roof direction: South-facing, 39° tilt
Electricity rate: $0.155/kWh (Delmarva Power)
Annual production: ~7,000 kWh (NREL PVWatts estimate for Wilmington, DE)

Annual Savings Calculation (With Net Metering + SRECs)

25-Year Outlook (With 4% Electricity Inflation + SRECs)

• Years 1–10 (payback phase): Cumulative savings ~$16,600 (system cost recovered)
• Years 11–25 (profit phase): Cumulative additional savings ~$30,000–$35,000
• Total 25-year savings: ~$46,000–$50,000
• Return on Investment (ROI): ~180% over 25 years

Estimated monthly savings: ~$90 | Yearly: $1,085 (plus ~$15/month from SRECs)

Note: SREC prices are market-based and can fluctuate. The $25/SREC estimate is a mid-range figure — prices can be $15–$35 depending on market conditions. Green Energy Program rebates are subject to funding availability — apply early.

❄ Does Solar Work in Delaware Winters & Cloudy Weather?

Yes — modern solar panels work in all weather conditions, including Delaware's cloudy winters. Here's the data:

Monthly Production in Wilmington, DE (6 kW system)

Key takeaway: Delaware's moderate sun hours and cloudy winters mean winter production is lower (28–31% of peak). However, the SREC income and net metering make solar economics attractive despite the cloudy climate. A properly sized system can still achieve net-zero annual electricity bills.

💬 Frequently Asked Questions — Solar in Delaware

Does Delaware have net metering?

Yes. Delaware has a state law (26 Del. C. § 1001 et seq.) requiring all utilities to offer net metering. You receive full retail rate credit for excess electricity sent to the grid, which can be used to offset electricity consumed at night or during winter months.

How much can I save with solar panels in Delaware?

A typical 6 kW solar system in Delaware saves about $90/month, or $1,085/year (assuming net metering at $0.155/kWh). With SREC income of ~$15/month, total monthly benefit is ~$105. Over 25 years, total savings exceed $46,000 (assuming 4% electricity inflation and 0.5% annual panel degradation).

What are SRECs and how do I earn them in DE?

SRECs (Solar Renewable Energy Credits) are certificates you earn for every MWh (1,000 kWh) of solar electricity your system produces. Delaware's renewable energy mandate creates demand for SRECs — utilities must buy them to meet state requirements. You can sell your SRECs through an aggregator or broker for $15–$35 per credit. A 6 kW system typically generates 6–8 SRECs per year.

What is the Green Energy Program rebate in Delaware?

Delaware's Sustainable Energy Utility (SEU) administers the Green Energy Program, which provides rebates for solar installations. Current rebates are typically $2,000–$4,000 depending on system size and funding availability. Applications must be submitted before installation — check the SEU website for current cycles.

Do I need battery storage in Delaware?

If your utility offers net metering, battery storage is optional — you can use the grid as a "virtual battery." However, battery storage is valuable if you want backup power during outages or if you want to maximize self-consumption of your solar production.

📊 Ready to See Your Delaware Solar Savings?

Our solar calculator gives you a personalized estimate based on your location, electricity usage, and Delaware's solar conditions (including SREC income). Takes 30 seconds, no email required.

📚 Data Sources & Methodology

Electricity rates: U.S. Energy Information Administration (EIA), Delaware Electricity Profile 2025.

Solar production estimates: NREL PVWatts Calculator, using Wilmington, DE weather data.

Net metering policies: Delaware Public Service Commission (PSC) net metering guidelines.

SREC market data: Delaware Renewable Energy Portfolio Standard (REPS) compliance reports.

Federal tax credit: IRS Form 5695 instructions (2026 revision).

Disclaimer: These are estimates for planning purposes. Actual savings vary based on your specific home, utility, roof orientation, and installation costs. Consult a licensed solar installer for a precise quote. SREC prices are market-based and can fluctuate.