Delaware solar rebate or your own SRECs? Working through the trade-off

Solar installers are quoting a different kind of project this fall than they were a year ago. The federal Residential Clean Energy Credit, 30% of system cost, ended for systems whose installation is completed after December 31, 2025, so the last-minute year-end rush that used to define the fourth quarter has nothing to rush toward. For a Delaware homeowner who owns the system, what remains is the state's per-watt grant, net metering, and the chance to sell the system's Solar Renewable Energy Credits. The catch is that the first and the last of those pull against each other.

The condition behind the grant

For Delmarva Power customers, the Green Energy Program pays $0.80 per watt for an owned residential system up to 50,000 watts, with a maximum grant of $10,000. DNREC's page also says that as part of the grant application, applicants must sign over their Solar Renewable Energy Credits to the Delaware Sustainable Energy Utility. The page does not state for how many years. Every megawatt-hour your system generates earns one SREC, so signing them over means giving up that income stream in exchange for money up front.

A hypothetical comparison, using your numbers instead of ours

The arithmetic is simple, but it has to be filled in with figures from your own quote. Everything below is an illustration only, not a forecast.

• The grant. A hypothetical 8,000-watt system would earn 8,000 × $0.80 = $6,400, provided the project is quoted at $6.00 per watt or less and the grant stays at or below 50% of total project cost.
• The SRECs. Suppose an installer estimates that the same system produces 9 megawatt-hours a year, which is 9 SRECs. At roughly $30 each, a figure that recent winning bids have cleared around for the first 10 years but which is set by auction and not guaranteed, that is about $270 a year, or about $2,700 over ten years. The SREC Delaware program also describes a fixed $10 per SREC for years 11 through 25.

In that made-up example, the up-front grant is larger than the first ten years of SREC income. But change the production estimate, the auction price, or the number of years the sign-over covers, and the answer can move. The point is not that one choice is right; it is that the comparison is quick to do once you ask for the right inputs.

Questions to put to the installer

1. What is the estimated annual production in megawatt-hours, and what assumptions sit behind it?
2. What is the total project cost per watt? It has to be $6.00 per watt or less for any grant.
3. Has the installer completed the Solar Shade Analysis? DNREC requires one in Part 1 of the application, with a Total Solar Resource Fraction of 70% or higher.
4. Who handles SREC registration if you decline the grant, and what does that cost?
5. Is your utility Delmarva Power? The grant is funded through a charge on Delmarva customers' bills and does not extend to Delaware Electric Cooperative or municipal customers.

The filing clock and the wait

DNREC treats an application filed more than 12 months after installation is completed as ineligible, so a system finished this fall has until about the same time next year. Separately, DNREC's page warns that high demand has delayed payment on some already-approved grants, which may be queued pending availability of funds. That is not a closure notice, but it means a grant can arrive well after the project, so do not count on it to cover a payment due at installation.

Loans and leases change the picture

Energize Delaware runs a Residential Solar Loan at 3.9% fixed, $5,000 to $50,000, up to 15 years, for credit-qualified owners of a single-family home or duplex; the Green Energy Program guide covers its terms. A solar lease or power purchase agreement is not eligible for the Green Energy Program grant at all. The overview page explains that the business-side federal credit behind leases still exists for now, but it belongs to the installer, and whether any of it reaches you is a matter of pricing.

Whichever way you lean, get the grant terms, including the SREC sign-over language, in front of you before you sign an installation contract. Rates, caps and procedures change, so confirm against DNREC's current documents.