What Is Net Metering? How Solar Credits Show Up on Your Bill
Net metering is a billing arrangement that credits solar customers for excess electricity their system sends back to the grid — typically valued at or near the retail rate — which then offsets what they'd otherwise pay for grid power at other times. It's why a solar owner's bill can show a credit line instead of, or alongside, a normal usage charge.
How the credit actually works
When a solar system generates more electricity than a building is using at that moment — typically around midday — the surplus flows out onto the local grid through a bidirectional meter that tracks power moving in both directions. The utility records that exported electricity and issues a bill credit for it, which the customer can then apply against electricity pulled from the grid at other times, like evenings or cloudy days. In effect, the grid acts like a battery: excess daytime generation banks credit that offsets nighttime or low-generation usage.
What happens to unused credits
How leftover credits are handled varies by state and utility. Some programs let credits roll forward from month to month, applying automatically against future bills; others cash out accumulated credits once a year, often at a lower rate than the retail credit rate; and some let unused credits expire after a set period. Because this detail affects the real value of a solar credit, it's worth confirming with the specific utility program rather than assuming a national standard.
Net metering vs. net billing
A growing number of utilities have moved, or are moving, from traditional net metering to a newer structure called net billing. The key difference is the credit rate: net metering generally credits exported power at or near the full retail rate — the same price you'd pay to buy electricity — while net billing credits exports at a lower rate, closer to the utility's wholesale cost of power. That distinction matters financially, since a lower export credit rate directly reduces how much a solar system saves its owner over time, even if the system's actual generation doesn't change.
Why utilities and regulators debate this
The rate paid for solar exports is a genuinely contested policy question: solar advocates argue full retail-rate credits are necessary to make solar economically viable for homeowners and businesses, while utilities argue that crediting at the full retail rate shifts fixed grid-maintenance costs onto non-solar customers. Where and how a state lands on this question is one of the more consequential utility policy decisions for anyone weighing a solar investment, and it's worth checking the current program rules — not older figures — before assuming a system's payback timeline.
Frequently asked questions
Does net metering pay me cash for excess solar power?
Usually not directly — most programs issue bill credits rather than cash payments. Depending on the utility and state, unused credits may roll forward month to month, get paid out once a year, or expire, so it's worth checking your specific program's rules.
What's the difference between net metering and net billing?
Net metering typically credits your excess solar generation at the same retail rate you'd pay to buy electricity. Net billing, a newer alternative some utilities have moved to, credits exports at a lower rate than retail — which generally reduces how much a solar system saves its owner.
Will net metering show up on my electric bill even if I don't have solar?
No — it only applies to accounts with an eligible on-site generation system, most commonly solar. If you don't have solar or another qualifying system, your bill won't include net metering credits or charges.
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