Solar in Delaware: is it worth it in 2026?
Delaware is a good state for solar: most homes that buy a system get their money back in about a decade. Three things decide that: electricity prices rank 18th of 51, its sun ranks 28th, and exported power earns full retail credit. Of the 51 states and DC, Delaware has the 16th-fastest payback for a typical home.
The average home here pays about $158 a month for 920 kWh. A 7.5 kW system sized for that home would knock about $1,754 off the first year's bills, 93% of the total.
Checked November 12, 2026
What makes solar pay off in Delaware
- Size the system to cover your yearly use. With full net metering, power you export is worth as much as power you use, so timing matters less than in most states.
- The price per watt decides it. At 17.1¢ per kWh, the price per watt matters as much as the sun. At $3.34 per watt, the high end of what companies quote, payback for a typical system here stretches to 14 years.
Payback by system size
An average Delaware home uses about 11,040 kWh a year. Here's how systems sized to cover part or all of that work out, bought with cash at $2.57 per watt:
| Covers | Size | Price | Makes a year | Payback | 25-year savings |
|---|---|---|---|---|---|
| 49% | 4 kW | $10,280 | 5,456 kWh | 11 years | $17,019 |
| 74% | 6 kW | $15,420 | 8,184 kWh | 11 years | $26,840 |
| 99% | 8 kW | $20,560 | 10,912 kWh | 11 years | $36,662 |
| 124% | 10 kW | $25,700 | 13,640 kWh | 13 years | $38,882 |
The 4 kW system pays back fastest, but the 10 kW system saves the most over 25 years. Assumes exported power earns full credit, prices rise 2.5% a year and one inverter replacement.
How Delaware credits power you send to the grid
Full credit (net metering)
Full retail net metering.
Before you sign in Delaware
Check the license. Look the company up with the Delaware Division of Professional Regulation (electricians), by its legal name or license number, and ask for the electrician's license number too.
Delaware has no solar-specific sales law that we know of, so its general consumer protection law applies.
In every state, the FTC Cooling-Off Rule lets you cancel a contract signed at your home until midnight of the third business day.
How to choose a solar company · Contract checklist · Before you sign
Delaware compared with its neighbors
| State | Electricity | kWh per kW | Typical payback | Exported power |
|---|---|---|---|---|
| Delaware | 17.1¢ | 1,364 | 11 years | Full credit (net metering) |
| Maryland | 19.5¢ | 1,392 | 9 years | Full credit (net metering) |
| Pennsylvania | 19.3¢ | 1,356 | 10 years | Full credit (net metering) |
| New Jersey | 22.5¢ | 1,305 | 9 years | Full credit (net metering) |
Questions about solar in Delaware
How long does solar take to pay for itself in Delaware?
About 11 years for a typical 7.5 kW system bought with cash at the 2026 median price of $2.57 per watt, with no federal tax credit and one inverter replacement. A bigger or smaller system, a different price, or your own usage will change that; the table above shows other sizes.
Does Delaware have net metering?
Yes. Full retail net metering.
Is there a solar tax credit in Delaware in 2026?
Not from the federal government for buyers: the 30% homeowner credit ended for systems installed after December 31, 2025. For a typical 7.5 kW system in Delaware, that credit was worth about $5,783 and brought payback down to 8 years, instead of 11 years now. Leasing companies can still claim a business credit, so ask for a lease or PPA price too. Your state energy office lists any state rebates.
Is a solar battery worth it in Delaware?
Not for savings. Delaware credits exported power at the full retail rate, and storing power in a battery loses about 10% of it, so a battery saves nothing on the bill. It can still be worth it for backup during outages: a 13.5 kWh battery costs about $15,650 installed in 2026.
Is plug-in solar legal in Delaware?
There's no plug-in solar law yet in Delaware, so your utility may treat a kit like any rooftop system.
How do I check a solar company's license in Delaware?
Look the company up with the Delaware Division of Professional Regulation (electricians) (dpr.delaware.gov) by its legal name or license number, and ask for the electrician's license too.
More guides: What changed for solar in 2026 · Lease or buy? · Plug-in solar · Is my solar system working?
Sources: U.S. Energy Information Administration (EIA), final 2025 data: Annual State Historical Spreadsheets (Form EIA-861, released October 7, 2026) and Electric Power Annual (October 21, 2026); NREL PVWatts (National Solar Radiation Database), statewide averages; Solar Energy Nerds: net metering by state, 2026; EnergySage: median quoted price, first half of 2026.