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Massachusetts Net Metering Explained: How Eversource and National Grid Homeowners Turn Excess Solar Power Into Real Bill Savings in 2026
Massachusetts Net Metering Explained: Turn Solar Into Real Bill Savings is a state-mandated billing mechanism that allows Massachusetts homeowners with solar panels to send unused electricity back to the grid through utilities like Eversource or National Grid, receiving kilowatt-hour credits at the full retail rate that directly offset future electricity bills — turning excess solar production into measurable, ongoing household savings.
If you’ve been exploring solar for your Massachusetts home, you’ve almost certainly come across the term net metering — and if you’re like most homeowners, you want someone to explain it in plain English without the industry jargon. You’re in the right place. When your solar panels produce more electricity than your home is using at any given moment, that excess power flows back to the grid, and your utility — whether that’s Eversource or National Grid — gives you a kilowatt-hour credit in return. Those credits then offset what you owe on future electricity bills. It’s one of the most powerful tools available to Massachusetts homeowners for dramatically reducing energy costs, and in 2026, with electricity rates among the highest in the entire country, understanding how net metering works could be worth thousands of dollars to your household budget.
How Massachusetts Net Metering Works: Quick Overview
| Step | What Happens | Result for You |
|---|---|---|
| 1. Solar panels generate power | Your system produces electricity during daylight hours | Your home draws from solar first, not the grid |
| 2. Surplus flows to the grid | Excess electricity exports through your utility meter | Eversource or National Grid records your export |
| 3. Credits issued at retail rate | You receive 1 kWh credit for every kWh exported | Credits appear on your monthly bill |
| 4. Credits offset future bills | Unused credits roll over month to month | Your electricity bill drops significantly |
This guide breaks down exactly how net metering works in Massachusetts, how much you can realistically save, how credits roll over, and how net metering compares to other state solar incentives like the SMART program. Let’s dig in.
What Is Net Metering and How Does It Work in Massachusetts?
Net metering is a billing mechanism — not a separate program you have to sign up for independently. In Massachusetts, it is a state-mandated right for customers of investor-owned utilities, which means if you’re an Eversource or National Grid customer and you install a qualifying solar system, you are legally entitled to net metering under regulations set by the Massachusetts Department of Public Utilities (DPU).
Here’s how the mechanics work on a practical level:
- Your solar panels generate electricity during daylight hours — more on sunny summer afternoons, less on cloudy winter days.
- Your home uses what it needs in real time. Running your air conditioner, dishwasher, lights, and electronics all draw from that solar production first.
- Any surplus electricity that your home doesn’t immediately consume flows back through your utility meter onto the Eversource or National Grid distribution grid.
- Your meter literally runs backward (or the smart meter records a net export), and your utility issues you a kilowatt-hour (kWh) credit at the current retail electricity rate for every kWh you export.
- When the sun goes down — or on days when your panels can’t keep up with demand — you draw electricity from the grid as normal, and those net metering credits offset what you owe.
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