Delaware solar calculator

Live production from NLR (formerly NREL) PVWatts V8. Delaware mandates full retail 1:1 net metering across all utilities (DE Code Title 26 § 1014) — self and export both credit at about $0.165/kWh on Delmarva Power (modeled default), Delaware Electric Cooperative, and DEMEC municipal utilities. Pick ONE incentive path via the selector below the calculator. Rebate (default): Green Energy Program upfront cash $0.70/W capped at $6,000 on Delmarva (DEC and DEMEC have lower caps), SREC revenue = $0 (assigned to state). SREC: no upfront rebate, SREC stream about $30/SREC for years 1-10 then about $10/SREC for years 11-25 — tied to actual annual production. Cap: 110% of annual consumption, ≤25 kW residential. NO state sales tax (Delaware is one of 5 no-sales-tax US states). Property tax exempt automatically (DE exempts all personal property). No state income tax credit. Federal §25D = $0 for 2026 purchases (OBBBA repeal). Defaults: south-facing roof mount, 20° tilt, 14% losses.

Delaware: Green Energy rebate OR SREC stream — pick ONE

Both paths use the same full-retail 1:1 net metering. At most DE utilities, taking the Green Energy Program rebate requires you to assign your SRECs to the state — you cannot stack both. Choose at install.

Green Energy Program rebate (default)
Delmarva: $0.70/W upfront, capped at $6,000 (cash at install). DEC and DEMEC municipals use lower per-watt rebates with their own caps. SREC revenue = $0 — your SRECs go to the state for the program term.Keep SRECs (no rebate)
No upfront rebate. SREC revenue from the Delaware SREC Procurement Program: about $30/SREC years 1-10 ($0.030/kWh), then about $10/SREC years 11-25 ($0.010/kWh). Tied to actual annual production. May exceed the rebate over the long term for larger systems; cash-now is lower.

Try (Wilmington), (Dover), (Lewes) — any valid US ZIP for this state also works.