West Virginia solar calculator

Live production from NLR (formerly NREL) PVWatts V8. West Virginia net metering changed materially under PSC settlements in 2024-2025 — and most WV solar coverage still describes the old retail-rate case. NEW 2026 customers are on per-utility haircut export rates, NOT full retail. Export by IOU: Appalachian Power (APCo, default, Charleston / southern WV) about $0.124/kWh (about 67-75% of APCo retail $0.167); Mon Power (FirstEnergy, north — Morgantown) about $0.0934/kWh; Potomac Edison (FirstEnergy, east — Martinsburg) about $0.0934/kWh. Self-consumed offsets full retail (~$0.13 statewide). Residential cap 25 kW. FirstEnergy enrollments on or before Dec 31, 2024 are grandfathered to retail for 25 years (not modeled here). NO state SREC market, no RPS (WV REPEALED its RPS in 2015). WV Code §11-13Z-1 (30% up to $2,000) is on the books but widely believed EXPIRED — not modeled, verify with WV State Tax Department. Sales tax (6%) NOT EXEMPT for residential (~$900-1,400 added cost). Property tax DISPUTED (sources conflict; low WV rate ~0.5-0.6% so modest effect). Federal §25D = $0 (OBBBA repeal). No statewide battery rebate. Cheap install pricing (~$2.60-3.20/W). Typical solar-only payback 12-16 years on APCo, 14-18 on Mon Power / Potomac Edison. Defaults: south-facing roof mount, 20° tilt, 14% losses.