State Guide
Solar Panel Cost in Delaware (2026)
See how much solar panels cost in Delaware with local electricity rates, incentives, and payback estimates.
Last updated: 2026-06-09· Source label: EIA residential electricity rates, IRS federal clean energy credit, NREL/PVWatts solar assumptions
Delaware is a small but incentive-rich solar market. Residential rates average $0.18/kWh (EIA March 2026), and the combination of full retail net metering plus an active SREC (Solar Renewable Energy Certificate) market can meaningfully boost the effective value of each kilowatt-hour produced. Delmarva Power serves the majority of customers, with the Delaware Electric Cooperative and the City of Dover covering the remainder. The state's Green Energy Grant offers (verify current cap at dsireusa.org) in upfront support, and SREC sales add ongoing revenue — typically $20–$30 per MWh. The small-state footprint means utility rules are fairly uniform, but coastal weather and roof age should be factored into production assumptions and installation cost estimates.
Texas Solar Calculator
Estimates based on delaware state averages. Your actual cost depends on roof, equipment, installer, and financing.
Incentives & Rebates
Federal Residential Credit Caveat
For projects where IRS project-year rules support a residential credit, a 30% credit would be roughly $6,720 on a $22,400 system. For 2026+ residential projects, RenewableCalc keeps this at 0% unless current IRS guidance supports eligibility.
State and Utility Incentive Context
Delaware's Green Energy Grant provides (verify current cap at dsireusa.org) for qualifying residential solar systems, and the state supports an active SREC (Solar Renewable Energy Certificate) market paying roughly $20-$30/MWh. The federal residential credit (Section 25D) expired Dec 31, 2025 and is not available for 2026+ projects. Verify grant funding availability and current SREC pricing before relying on these incentives in a quote.
Net Metering
Delaware offers full retail net metering through Delmarva Power, plus an active SREC market that provides additional revenue of roughly $20–$30 per MWh generated. The combination of retail bill credits and SREC income raises the effective solar value above the headline rate. Confirm system-size eligibility, annual true-up rules, and SREC registration with your utility and the Delaware Public Service Commission.
Top Electric Utilities
- 1. Delmarva Power
- 2. Delaware Electric Co-op
- 3. City of Dover
Source: EIA-861, by customer count
Recommended next steps
Calculate your ROI
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Refine your estimate
Use the Solar ROI Calculator with your Delaware utility rate, annual kWh usage, and quote assumptions.
Frequently Asked Questions
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Show my solar path →Overview
Delaware is a small but incentive-rich solar market. Residential rates average $0.18/kWh (EIA March 2026), and the combination of full retail net metering plus an active SREC (Solar Renewable Energy Certificate) market can meaningfully boost the effective value of each kilowatt-hour produced. Delmarva Power serves the majority of customers, with the Delaware Electric Cooperative and the City of Dover covering the remainder. The state's Green Energy Grant offers (verify current cap at dsireusa.org) in upfront support, and SREC sales add ongoing revenue — typically $20–$30 per MWh. The small-state footprint means utility rules are fairly uniform, but coastal weather and roof age should be factored into production assumptions and installation cost estimates.
Use this result
Use the calculator inputs first, then compare the result against local rates, incentives, roof conditions, and utility export rules.
Method, assumptions, and sourcesOpen this section when you want to audit the calculation behind the estimate.ShowHide
Calculation Method
Delaware solar payback = net installed cost after incentives / annual avoided electricity cost plus export credits
Key Assumptions
- Policy last reviewed: 2026-06-09. Federal residential credit assumptions are project-year dependent and not applied by default for 2026+ projects.
- Residential rate and installed-cost figures are planning benchmarks, not a final utility bill audit or installer quote.
- The model assumes a roof with usable sun exposure; shading, roof age, electrical upgrades, permitting, and financing can materially change cost.
- Delaware economics should be checked against small-state utility variation, net-metering rules, and coastal weather and roof constraints.
- The federal tax credit only helps households with sufficient tax liability and qualifying project documentation.
Data Sources
Electricity rates
EIA Electric Power Monthly
Residential electricity-rate benchmark used for avoided-bill savings.
Solar production
NREL PVWatts
Solar production assumptions should be checked against local roof orientation, shading, and climate.
Federal incentive
IRS Residential Clean Energy Credit
Supports 2026 Section 25D expiration (residential ITC no longer available by default) for qualifying residential solar costs.
State and utility policy
DSIRE and local utility tariff pages
Used as a reminder to verify state incentives, net-metering, export-credit, and rebate rules before relying on an estimate.
Result Summary
Net cost before federal residential credit
~$18,900-$20,400
At $2.80/W for an 8 kW system ($22,400) less Green Energy Grant of (verify current cap at dsireusa.org). No 2026+ federal residential credit is applied by default.
Estimated payback
7-10 years
Depends on actual utility rate, Green Energy Grant eligibility, SREC market pricing, installed cost, roof production, and financing.
Annual bill offset
$1,800-$2,400/yr
Estimate for an 8 kW system at $0.18/kWh with 4.5 peak sun hours/day, full retail net metering, and SREC income of ~$250-$400/year.
Formula Assumptions Data Sources FAQ Related Links
Compare Solar Costs With Neighboring States
Solar economics vary by state. Compare Delaware with nearby states to see how electricity rates, incentives, and payback periods differ in your region.