Plug-In Solar Savings Calculator

Estimate your annual savings from plug-in solar based on your zip code, electricity rate, and system size. Uses real EIA utility rate data for accurate projections.

How the Calculator Works

• Enter your zip code to auto-detect your state and electricity rate
• Choose your system size (400W, 800W, 1,200W, or custom)
• See estimated annual savings, payback period, and 10-year ROI
• Compare with and without battery storage
• Factor in TOU (time-of-use) rate optimization

Data Sources

All electricity rates are sourced from the U.S. Energy Information Administration (EIA) as of March 2026. Solar production estimates use NREL PVWatts data for your location.