Delaware home battery rebate: the 2026 Solar + Storage Pilot

The short answer: yes, if your electricity comes from Delmarva Power. DNREC's Green Energy Program page says that as of August 10, 2026, the program launched three new rebate offerings, one of them a Solar + Storage Pilot Program for battery energy storage systems paired with solar. The pilot's guidelines, effective August 11, 2026, pay a residential applicant $250 per kilowatt-hour of storage, up to $6,000, and no grant may exceed 50% of the total eligible storage cost. We read DNREC's program page and the guidelines on November 7, 2026. This is a pilot, and pilots change, so read both again before you sign a contract.

The rates, by applicant type

• Residential: $250 per kWh, maximum grant $6,000.
• Commercial: $200 per kWh, maximum grant $30,000.
• Certified Diverse Business: $225 per kWh, maximum grant $35,000.
• Non-profit: $250 per kWh, maximum grant $40,000.

The guidelines list no hardware size cap for any applicant type. The two limits that do bind are the dollar maximum and the 50%-of-cost rule.

What that means in plain arithmetic

At $250 per kWh, the residential maximum of $6,000 is reached at 24 kWh of storage. Below that, the grant is simply the capacity times $250, as long as it does not exceed half of what the storage costs. As a made-up example, a 10 kWh battery would work out to $2,500, provided the eligible storage cost is at least $5,000. A 30 kWh system would still be capped at $6,000. One thing the guidelines do not say is whether the kilowatt-hours are measured as the battery's nameplate or its usable capacity, and some products quote both. Ask the program which figure it will use before you compare quotes.

Who can apply

• Delmarva Power customers only. The guidelines require the applicant to be a Delmarva Power & Light electric customer, and DNREC's page says the program's grants are funded through a public benefits charge on Delmarva bills.
• You must own the battery. It must be purchased and owned by the homeowner, business or non-profit that applies. As written, a leased battery or one owned by a third party does not meet that condition.
• It must be installed at your address, behind the meter, and permanently.
• The solar rules apply too. DNREC's page says applicants must meet the program's existing guidelines for solar applications.

Two ways in, and one of them is narrow

The guidelines describe two application pathways, both submitted through the Green Grant Delaware portal: a new solar-plus-storage installation, or a battery added to an existing solar system that already has a verified Green Energy Program application. The second path has a tight window. The existing solar must have received interconnection approval within the last 12 months and must have been approved for the program's solar rebate.

That second condition matters if you kept your solar renewable energy credits instead of taking the solar grant, which is the trade-off we worked through in solar rebate or your own SRECs. A system that never had an approved solar grant does not fit the add-on path as the guidelines are written, and neither does one interconnected more than a year ago.

The one-year interconnection clock

Every battery goes through Delmarva's standard interconnection process, and the battery must have received final interconnection approval no more than one year before you submit the application. Systems interconnected more than a year earlier are ineligible. Put the approval date on your calendar the day it arrives.

Ten years of strings

This is the part a quick rate comparison misses. The guidelines attach several long-running conditions:

• Utility dispatch. "Once available," the battery must be enrolled with Delmarva in an Active Dispatch program for 10 years. The guidelines do not explain what that program involves, how often the battery could be called on, or whether participants are paid. Ask DNREC and Delmarva before you commit.
• Backup power. The battery must be able to island from the grid during an outage and power your address.
• Warranty. It must be commercially available with at least a 10-year manufacturer warranty, with customer service and technical support from the manufacturer.
• Performance. The equipment supplier must maintain the rated power capacity for the project's 10-year service life, with availability above 75%.
• Disposal. Decommissioning falls to the contractor or third-party owner (or a party they designate), and the contractor or owner is held responsible for disposing of and recycling the components properly.

The solar half keeps its own rules

A paired system is still a solar application. The program's rates effective July 1, 2026 pay $0.80 per watt for an owned residential system, up to $10,000; solar leases and power purchase agreements are not eligible; the total project cost must be $6.00 per watt or less; a Solar Shade Analysis must show a TSRF of 70% or more; no grant may exceed 50% of project cost; and an application filed more than 12 months after completion is ineligible. Applicants must also sign over their SRECs to the Delaware Sustainable Energy Utility. Our Green Energy Program guide covers those terms.

The program's general instructions add an energy audit before you apply (a BPI-certified auditor for residential applicants), a contractor from its participating list, and a state eSupplier registration whose name and address match the application. They say rebates are typically issued 10 to 12 weeks after approval, while DNREC's page warns that high demand has delayed some payments and that grants may be queued pending available funds. The instructions were written for the program as a whole, so ask the team (DNREC.GEP@delaware.gov) which steps apply to a battery-only add-on.

Not on Delmarva Power?

DNREC's page says Delaware's other utilities run similar programs and points non-Delmarva customers to renewable energy rebates through the Delaware Electric Cooperative and the Delaware Municipal Electric Corporation. We did not confirm whether either covers batteries, so ask your utility directly.

No federal credit to stack it with

The federal Residential Clean Energy Credit used to cover battery storage of at least 3 kWh. The IRS now says the credit is not available for any property placed in service after December 31, 2025, so a battery installed in 2026 gets nothing from it. The pilot guidelines do not say whether the grant is taxable income; that is a question for a tax professional.

Questions to ask before you sign

1. Is my electric utility Delmarva Power?
2. What is the battery's capacity in kWh, and which figure will the application use?
3. Will I own the battery outright, or is it leased or third-party owned?
4. Can it island and power the house during an outage?
5. Does it carry at least a 10-year manufacturer warranty?
6. If I already have solar: when was it interconnected, and was it approved for the program's solar rebate?
7. What will the Active Dispatch enrollment require of me, and for how long?

Amounts, caps and conditions can change at any time, and a pilot can close. Confirm everything against DNREC's current documents on the day you sign.