Claire WhitakerBy Claire Whitaker

Updated November 2026

The ma net metering program lets homeowners with solar panels send extra electricity to the grid and receive bill credits for it. In this guide, you will learn how the program works in Massachusetts, what your system needs to qualify, and how to make sure your credits show up on your utility bill.

How Net Metering Works in Massachusetts

Under net metering, your solar system generates electricity that powers your home first. When your panels produce more than you use, the surplus flows onto the grid and your meter runs backward. At the end of each billing period, the utility nets your exported and imported kilowatt-hours. If you exported more than you consumed, the difference becomes a credit on your next bill.

Shopping for one? See our guide: PPL Net Metering Program vs Standard Grid Export: Which Should You Choose?.

Credits are typically applied to your supply charges rather than fixed delivery fees, so check your bill to see which charges your credits offset. Credits generally carry forward month to month, but the rules for unused credits at the end of a year depend on your utility and the current program terms.

Steps to Get Enrolled

  1. Confirm your utility territory. Your utility, such as Eversource, National Grid or Unitil, runs its own interconnection process.
  2. Get your system sized. Most applications list the system’s AC output and the inverter specifications, so have your installer’s design ready.
  3. Submit the interconnection application before installation. Many utilities require approval before you energize the system.
  4. Install a bidirectional meter if your utility requires one. Some installers handle this step for you.
  5. Receive permission to operate, then confirm your first bill shows the solar credit line.

Timelines vary, so ask your utility for its current queue status early. A solar installer familiar with local interconnection rules can save you weeks of back-and-forth.

Factors That Affect Your Credits

System Size and Orientation

Larger systems export more power, but utilities often cap the size of systems eligible for net metering. Panels facing south with a tilt close to your latitude usually generate the most energy in Massachusetts.

Your Usage Pattern

Homes that use most of their power during daylight hours will export less, which means fewer surplus credits. Running dishwashers, EV chargers or heat pumps during the day can improve how much of your solar output you consume directly.

Factor Effect on Credits
Panels facing south, tilted near latitude Higher annual production
Heavy daytime household use Lower net exports
Shading from trees or nearby buildings Reduced output and smaller credits
System size above utility cap May shift you to a different program

Common Mistakes to Avoid

  • Energizing the system before receiving utility approval, which can delay or void your interconnection.
  • Assuming every charge on your bill is offset by credits. Delivery and some fixed fees usually remain.
  • Ignoring shading. Even partial shade on one panel can reduce output more than you expect.
  • Forgetting to update your utility when you add panels or change your system.
  • Skipping a bill review. Check your first few statements to confirm credits are applied correctly.

A basic home energy monitor helps you see how much your panels produce and how much you export, so you can match your usage to your credits. View on Amazon

A solar-rated surge protector helps guard your inverter and home electronics against grid spikes, which matters more with a grid-tied system. View on Amazon

FAQ

Do I need a bidirectional meter for the ma net metering program?

In many cases yes, since a bidirectional meter measures both imported and exported electricity. Your utility will tell you whether it requires a meter upgrade for your system.

Can unused credits roll over?

Credits usually carry forward from month to month. Year-end treatment of leftover credits depends on your utility and current program rules, so confirm with them directly.

How long does approval take?

Timelines vary by utility and queue volume. Submitting a complete application with accurate system specifications is the most reliable way to avoid delays.

Conclusion

The ma net metering program can turn your rooftop solar output into bill credits when you follow the interconnection steps and size your system correctly. Watch your first few bills closely to confirm credits are applied as expected. If your situation is complex, consult a licensed solar installer or your utility’s customer program staff for guidance.

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Claire Whitaker

About Claire Whitaker

Claire Whitaker is part of our editorial team and reviews and edits our home solar guides, checking product details against manufacturer specifications and owner feedback.