Net Metering Credit Calculator

About the Net Metering Credit Calculator

Net metering allows solar panel owners to send excess electricity back to the grid and receive credits on their electric bill. When your solar system produces more electricity than you use (typically during midday), the surplus flows to the grid and your meter runs backward. These credits offset electricity imported from the grid at other times (nights and cloudy days).

The value of net metering credits varies significantly by state and utility. Some states offer full retail rate credits (e.g., $0.12–$0.20/kWh), while others offer reduced "avoided cost" or wholesale rates ($0.03–$0.08/kWh). Net metering policies are evolving rapidly, with many states transitioning to "net billing" or "net metering 2.0" with lower credit rates.

This calculator estimates the monthly and annual value of your exported solar electricity based on kWh exported and your credit rate. Use it to evaluate the financial return of your solar system and understand how policy changes might affect your savings.

When This Page Helps

Net metering credits are a key part of solar economics. This calculator shows the actual dollar value of your exported electricity, helping you optimize self-consumption and evaluate the impact of rate changes.

How to Use the Inputs

1. Check your solar monitoring system for monthly kWh exported to the grid.
2. Enter the average monthly kWh exported.
3. Enter your net metering credit rate (check your utility's tariff).
4. View monthly and annual credit values.
5. Compare credit value vs retail rate to assess net metering fairness.
6. Model scenarios with different export levels or rate changes.

Example Calculation

Tips & Best Practices

• Maximize self-consumption to reduce reliance on net metering credits.
• A home battery stores excess solar for evening use, reducing exports.
• Time heavy loads (EV charging, laundry) during peak solar hours to use more directly.
• Monitor your utility's net metering policy for upcoming rate changes.
• Credits may expire annually in some jurisdictions — check your utility's rules.
• Oversize your system only if credit rates remain favorable long-term.

Net Metering Policy Landscape

As of 2025, about 35 states plus DC have mandatory net metering rules. Several states (California, Idaho, Indiana) have modified their policies to reduce credit rates for new solar installations. Grandfathering provisions protect existing solar owners for 10–25 years under their original terms.

Net Metering vs Net Billing

Traditional net metering credits exports at the full retail rate. Net billing credits exports at a lower rate (often wholesale or "avoided cost"). The shift from net metering to net billing reduces the value of exported electricity by 40–70%, making self-consumption and battery storage more important.

Optimizing Solar Under Net Metering

To maximize net metering value: size your system to approximately match annual consumption, shift loads to daytime hours when solar is producing, and consider a battery if your credit rate drops below retail. West-facing panels produce more afternoon electricity to offset peak-rate consumption.

Frequently Asked Questions

• What is net metering?

  Net metering is a billing arrangement where solar panel owners receive credits for excess electricity sent to the grid. Your electric meter effectively runs backward when you export, and the credits offset electricity imported at other times.

• How much are net metering credits worth?

  In states with full retail net metering, credits are worth the full retail rate ($0.10–$0.25/kWh). In states with reduced net metering, credits range from $0.03–$0.10/kWh. Some states are transitioning to time-varying export rates.

• Do credits roll over month to month?

  In most net metering programs, excess credits roll over monthly for up to 12 months. At the annual "true-up" date, remaining credits may be paid out at a reduced rate or forfeited, depending on your utility's policy.

• Is net metering being eliminated?

  Some states are modifying net metering to reduce credit rates (e.g., California's NEM 3.0). However, most states still offer some form of net metering. Existing customers are often grandfathered under their original terms for 10–25 years.

• Should I get a battery instead of relying on net metering?

  If your net metering credit rate is significantly below retail, a battery may improve economics by letting you use more solar directly. If credits equal the retail rate, net metering is like free storage and a battery adds less value.

• How does net metering affect my electric bill?

  Net metering credits reduce your bill by offsetting imported electricity. In months where you export more than you import, you may owe only the minimum delivery charge. Over a year, many solar owners reduce their electric bill by 70‒90%.