What is net metering in simple terms?

When your solar panels make more electricity than your home is using, the extra flows onto the utility grid and your utility credits your account for it. At night or on cloudy days you pull power back from the grid, and those credits offset what you owe, so you're billed on the net difference. It's a major reason rooftop solar can lower a bill — but the value depends entirely on the credit rate your utility uses.

Does net metering mean my solar bill will be zero?

Not necessarily. Net metering can offset a large share of your usage, but most utilities still charge fixed connection or service fees you'll pay regardless, and under net-billing rules your exports may be credited at less than the retail rate. Whether your bill gets close to zero depends on your system size, your usage pattern, and your utility's specific policy, so treat any "eliminate your bill" claim as an estimate to verify.

What's the difference between net metering and net billing?

Traditional full retail net metering credits every exported kilowatt-hour at the same rate you pay to buy power. Net billing (sometimes called a successor tariff) credits exports at a lower rate, closer to the wholesale or avoided-cost value of the electricity. The distinction matters because it directly changes how much you save, so confirm which one your utility uses before trusting a savings estimate.

Did California end net metering?

California didn't eliminate solar credits, but in 2023 it moved new residential customers onto a net-billing structure that generally credits exported power below the full retail rate, which changed the savings math for new systems. Existing customers were often kept on prior terms for a period. It's the most-cited example of a broader shift, but the specifics are California's — check your own state and utility rather than assuming the same rules apply to you.

How do I find out my utility's net-metering policy?

Start with your utility's own website, which publishes its current net-metering or net-billing tariff, and cross-check with DSIRE (dsireusa.org), a database that tracks state and utility solar programs. Because these rules change, confirm you're looking at the current version, and note any grandfathering that would lock in today's terms if you sign now.

How does net metering affect my solar quote's savings estimate?

A lot. The savings and payback numbers in a quote assume some rate for the power you export. If that assumption is full retail net metering but your utility actually uses lower net-billing credits, the estimate can overstate your savings. Ask the installer what net-metering rate their math uses, and verify it against your utility's current policy before you sign.

What Is Net Metering? How Solar Bill Credits Work

Net metering is the quiet engine behind most solar savings — and the rate your utility uses is changing in ways that can reshape your payback.

Last reviewed July 2026

If a solar quote promises big monthly savings, a lot of that number quietly depends on one thing: how your utility pays you for the extra power your panels send back to the grid. That mechanism is called net metering, and it's one of the biggest reasons rooftop solar can lower a bill at all.

This guide explains what net metering is, how those bill credits actually work, why the rules differ so much from one state and utility to the next, why some places are replacing full net metering with lower-credit "net billing," and why the net-metering rate a quote assumes can make or break its savings math.

What net metering is, in plain terms

Your solar panels don't produce power evenly across the day. They peak around midday, when the sun is highest — which is often exactly when no one is home using much electricity. Net metering is the billing arrangement that keeps that midday surplus from going to waste.

Here's the basic idea. When your panels make more electricity than your home needs, the extra flows back onto the utility grid, and your utility credits your account for it. Later — at night, or on a cloudy day when your panels can't keep up — you pull electricity back from the grid, and those credits offset what you owe. In the simplest version, your meter effectively runs backward while you export and forward while you import, and you're billed on the "net" difference. That's where the name comes from.

Why net metering drives so much of the savings

Without something like net metering, the power your system makes while you're at work would simply be lost, and you'd still pay full price for every kilowatt-hour you use in the evening. Net metering lets the grid act a bit like a savings account for your electricity: bank the surplus by day, draw it down at night.

That's why it's one of the most important levers in whether solar pencils out. A home that can offset most of its evening and nighttime usage with daytime credits sees a very different bill than one that can't. Batteries change this too — storing your own surplus instead of exporting it — but for most grid-tied systems, the credit you get for exported power is central to the savings.

Net metering vs. net billing — and why it's changing

For years, the standard arrangement was full retail net metering: every kilowatt-hour you exported was credited at the same retail rate you pay to buy power. Many states and utilities still offer some version of this. But the trend is shifting.

A growing number of places have moved, or are moving, to what's often called net billing or a "successor" tariff. Under net billing, exported power is typically credited at a lower rate — closer to the wholesale or "avoided cost" value of the electricity — rather than the full retail rate. California is the most widely cited example: in 2023 it moved new residential solar customers onto a net-billing structure that generally credits exports below the retail rate, which changed the payback math for systems installed under the new rules. Existing customers were often kept on their prior terms for a period, and the exact details depend on the utility — so treat California as an illustration of the direction things are moving, not a template for your state.

The takeaway isn't that net billing makes solar a bad deal; plenty of systems still pencil out under it. It's that the credit rate matters enormously, and it's no longer safe to assume full retail credit everywhere.

Why the rules vary so much by state and utility

Net-metering policy isn't set at the national level. It's decided by state utility regulators and, in many cases, by individual utilities — which is why the rules can differ not just between states but between two utilities in the same state.

A few things commonly vary: the rate at which exports are credited, whether unused credits roll over month to month or expire, whether there are extra fees for solar customers, and how "grandfathering" works — that is, whether signing up under today's rules locks in those terms for a set number of years even if the policy changes later. Because these details shift over time and depend on where you live, the reliable way to know your situation is to check your own utility's current tariff and a policy database like DSIRE (dsireusa.org), which tracks state and utility programs.

How net metering shapes the savings estimate in your quote

Here's why this matters the moment you're holding a quote. Every savings, bill-offset, and payback figure a proposal shows you rests on an assumption about how your exported power gets credited. If the estimate quietly assumes full retail net metering but your utility actually uses a lower net-billing rate, the modeled savings can look better than what you'd really see.

So it's fair — and smart — to ask the installer exactly what net-metering or net-billing rate their savings estimate is built on, then confirm that against your utility's current policy. It's the same spirit as checking the price per watt: you're pressure-testing the assumptions behind a big number, not accusing anyone of anything.

While you're at it, make sure the math isn't also leaning on the 30% federal tax credit. That credit (Section 25D) was terminated for most residential systems placed in service after December 31, 2025, so most 2026 buyers can no longer claim it — verify your situation with a tax professional. An outdated credit assumption and an optimistic net-metering assumption can each make a quote look rosier than reality. If you'd rather not untangle it alone, running your quote through an independent check will flag the assumptions built into the estimate and hand you the specific questions to ask.

How to confirm your net-metering rate before you sign

You don't need to be an expert to sanity-check this. A few minutes of homework goes a long way:

Look up your utility's current net-metering or net-billing policy on its website, or search DSIRE (dsireusa.org) for your state and utility.
Note the key terms: how exports are credited, whether credits roll over or expire, and any solar-specific fees.
Ask your installer, in writing, what net-metering rate their savings and payback estimates assume.
Check whether signing now grandfathers you into the current terms — and for how many years.
Confirm the estimate isn't relying on the expired 30% federal tax credit, and treat every savings figure as an estimate to verify for your home.

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Frequently asked questions

What is net metering in simple terms?: When your solar panels make more electricity than your home is using, the extra flows onto the utility grid and your utility credits your account for it. At night or on cloudy days you pull power back from the grid, and those credits offset what you owe, so you're billed on the net difference. It's a major reason rooftop solar can lower a bill — but the value depends entirely on the credit rate your utility uses.
Does net metering mean my solar bill will be zero?: Not necessarily. Net metering can offset a large share of your usage, but most utilities still charge fixed connection or service fees you'll pay regardless, and under net-billing rules your exports may be credited at less than the retail rate. Whether your bill gets close to zero depends on your system size, your usage pattern, and your utility's specific policy, so treat any "eliminate your bill" claim as an estimate to verify.
What's the difference between net metering and net billing?: Traditional full retail net metering credits every exported kilowatt-hour at the same rate you pay to buy power. Net billing (sometimes called a successor tariff) credits exports at a lower rate, closer to the wholesale or avoided-cost value of the electricity. The distinction matters because it directly changes how much you save, so confirm which one your utility uses before trusting a savings estimate.
Did California end net metering?: California didn't eliminate solar credits, but in 2023 it moved new residential customers onto a net-billing structure that generally credits exported power below the full retail rate, which changed the savings math for new systems. Existing customers were often kept on prior terms for a period. It's the most-cited example of a broader shift, but the specifics are California's — check your own state and utility rather than assuming the same rules apply to you.
How do I find out my utility's net-metering policy?: Start with your utility's own website, which publishes its current net-metering or net-billing tariff, and cross-check with DSIRE (dsireusa.org), a database that tracks state and utility solar programs. Because these rules change, confirm you're looking at the current version, and note any grandfathering that would lock in today's terms if you sign now.
How does net metering affect my solar quote's savings estimate?: A lot. The savings and payback numbers in a quote assume some rate for the power you export. If that assumption is full retail net metering but your utility actually uses lower net-billing credits, the estimate can overstate your savings. Ask the installer what net-metering rate their math uses, and verify it against your utility's current policy before you sign.