How Many Solar Panels for a $200 Electric Bill? (Sizing & ROI) | OmniCalc Pro

To eliminate a $200 monthly electric bill (~1,176 kWh/mo), you need an 18-panel (9.9 kWp) solar array with an 8 kW inverter. Calculate your exact payback.

Engineering Breakdown for a $200 Monthly Utility Bill

At the U.S. average tariff of $0.17/kWh, a $200/month electricity bill equals roughly 1,176 kWh per month (39.2 kWh/day). With 5.0 peak sun hours and an 80% performance ratio, you need a 9.9 kWp solar PV system (18 panels of 550W) paired with an 8.0 kW string inverter, generating over $55,000 in net 25-year savings.