Missouri solar calculator

Live production from NLR (formerly NREL) PVWatts V8. Missouri operates net metering under the Net Metering and Easy Connection Act (RSMo §386.890) — mandate applies only to investor-owned utilities (Ameren Missouri, Evergy Missouri Metro / West, Liberty / Empire). Co-ops and municipal utilities are NOT bound and set their own terms. CRITICAL: the two big IOUs compensate DIFFERENTLY. Evergy and Liberty offer effectively one-to-one MONTHLY RETAIL net metering (about $0.115/kWh export = retail offset) PLUS a $0.25/W upfront rebate. Ameren credits excess at AVOIDED COST monthly (about $0.0539 summer / $0.0392 winter, year-round average about $0.0466) and Ameren's residential rebate has ENDED. Use the selector below to switch between paths. System cap 100 kW residential. Annual true-up zeros leftover credits at avoided cost (no cash payout — credits expire after 12 months). Federal §25D = $0 (OBBBA P.L. 119-21, signed July 4, 2025). NO state income tax credit. Property tax EXEMPT, PERMANENT under RSMo §137.100(10) — solar systems exempt from personal property tax indefinitely (NOT year-limited). Sales tax NOT EXEMPT — normal state + local applies (RSMo §137.100 is PROPERTY tax only, do not confuse). NO SREC market (Missouri's RPS expired 2021). NO statewide battery rebate. Cheap install pricing (about $2.90-3.12/W). Typical solar-only payback 13-17 years with federal $0 — better on Evergy / Liberty path (retail + rebate), worse on Ameren path (avoided cost). Sources citing about 12-year payback assume the now-dead 30% federal credit. MAIN RISK: credit-rate erosion — RPS expired with no replacement, PSC may approve 'NEM 3.0'- style downgrades in future years. Defaults: south-facing roof mount, 20° tilt, 14% losses.