Solar net metering for homeowners

Net metering is the billing arrangement that makes rooftop solar pay off for most homeowners. It sounds technical, but the idea is simple: you get credit for the extra power you send to the grid. Understanding how those credits work helps you judge any solar proposal.

How net metering works

Your solar array often produces more than your home needs in the middle of a sunny day. Under net metering, that surplus flows out to the grid and your utility credits your account. At night or on cloudy days, you pull power back from the grid and those credits offset what you use.

In effect, the grid acts like a giant battery that stores your excess production as credits instead of electrons. Your meter tracks energy flowing both directions, which is why people say it "runs backward" when you are exporting.

Credits and the annual true-up

You do not settle up every day. Most utilities net your production and consumption over a billing period, then reconcile everything once a year in a true-up.

• If you produced more than you used over the year, you may get a credit or a small payment, often at a reduced rate.
• If you used more than you produced, the true-up bill covers the difference.

The goal for most homeowners is to size a system that offsets close to their yearly usage without wildly overbuilding, since surplus is often credited at less than retail value.

Why the rules keep changing

Here is the part that trips people up: net metering is not one national program. Every state, and often every utility, sets its own terms, and those terms have been shifting.

Traditional full retail net metering credited every exported kilowatt-hour at the same rate you pay to buy power. That is generous, and many utilities have moved away from it toward:

• Lower export rates that credit surplus below retail value.
• Time-of-use pricing, where exported energy is worth more at peak hours and less off-peak.
• Successor tariffs (sometimes called NEM 2.0 or 3.0) that reshape the whole calculation.

These changes are exactly why a battery is becoming more attractive: storing your own surplus and using it at night can beat exporting it for a low credit.

What to check for your area

Because rules vary so much, do not assume a neighbor's experience matches what you will get. Before you commit:

• Ask your utility which net metering or successor tariff applies to new solar customers.
• Confirm the export rate and whether it is full retail or reduced.
• Ask about time-of-use rates that could change when your solar is most valuable.

If you are still figuring out how big your system should be to match your annual usage, our guide on how to size a residential solar system walks through the math.

The bottom line

Net metering turns your rooftop surplus into credits that offset the power you buy back later, settled up once a year at true-up. But the rules are moving targets, and the value of exported solar depends heavily on where you live. Check your local tariff, size your system to your usage, and consider storage if export credits are low. For more homeowner explainers, browse our guides library.

Educational reference, reviewed 2026-07. A design aid, not a substitute for a licensed electrician or PE. Confirm the enforced NEC edition and local amendments with your AHJ.