Net Metering Calculator
Calculate your solar export credits, grid imports, net electric bill, and projected annual savings.
How Net Metering Works
Self-Consumption vs. Export
When your solar panels produce more electricity than you're currently using, the surplus is sent back to the grid — a process called export. With net metering, your utility credits you for exported kWh at the buyback rate, which is applied against your future consumption charges.
Retail vs. Buyback Rate
Most utilities credit exported solar electricity at a rate lower than the retail price you pay to consume grid electricity. Full net metering credits exports at the full retail rate (1:1), while modified net metering and net billing programs credit exports at a lower wholesale or avoided-cost rate. The gap between these rates directly affects your savings.
Monthly Net Bill Calculation
Your net bill is calculated as: (grid imports × retail rate) − (exports × buyback rate). If your solar production exceeds your usage in a month, you may receive a credit that rolls forward, depending on your utility's policy.
Seasonal Variation
Solar production peaks in summer months due to longer days and higher sun angles, and dips in winter. Usage can also shift seasonally — higher in summer (air conditioning) and winter (heating). The 12-month projection estimates how your net bill changes throughout the year.