Net Metering Explained: How It Works and Why It Makes or Breaks Solar

If you only learn one piece of solar policy before going solar, make it net metering. After your electricity rate, it’s the single biggest factor determining whether solar pays off — and it varies enormously by state and even by utility. With the federal tax credit gone for 2026 installations, net metering matters more than ever, because it’s now one of the few mechanisms left that meaningfully improves your payback.

This guide explains what net metering actually is, how the money flows, why California’s NEM 3.0 changed the math for millions of homeowners, and exactly what to check before you sign a solar contract.

What Net Metering Actually Is

Solar panels produce the most power in the middle of the day — often more than your home is using at that moment. Net metering is the billing arrangement that decides what happens to that excess.

Under traditional (full retail) net metering, your meter effectively runs backward when you export power. Every excess kilowatt-hour (kWh) you send to the grid earns you a credit at the same retail rate you’d pay to buy electricity. Then at night, when your panels aren’t producing, you draw power from the grid and those credits cover it.

The grid acts like a free, infinite battery: you “deposit” cheap midday solar and “withdraw” it at night at par. At the end of the billing period, you only pay for your net consumption — hence “net metering.”

A simple example:

• Your panels produce 30 kWh on a sunny day.
• Your home uses 20 kWh that day, but only 8 kWh of it during daylight hours.
• You export 22 kWh to the grid (30 produced − 8 used live) and earn credits.
• That night you pull 12 kWh from the grid, covered by your credits.
• Net result: you banked 10 kWh of credit toward future bills.

Why Net Metering Makes or Breaks the Math

Here’s the part most people underestimate. The value of your solar system depends heavily on what your exported power is worth, and that can swing by 5–10×.

• Full retail net metering: exported power is worth ~$0.15–$0.35/kWh (whatever your retail rate is).
• No net metering / avoided-cost rate: exported power might be worth only ~$0.03–$0.06/kWh (wholesale).

That difference completely changes payback. In a full-retail-net-metering state, a system might pay back in 9–11 years. The same system in a state that only pays wholesale for exports could take 16–20 years — because all that midday surplus you can’t use yourself is suddenly worth almost nothing.

This is why two homeowners with identical bills, identical roofs, and identical systems can have wildly different solar outcomes purely based on which side of a utility border they live on.

California’s NEM 3.0: The Biggest Shift

California is the largest solar market in the US, so its rules matter to a huge number of homeowners — and in April 2023, California replaced “NEM 2.0” with NEM 3.0 (officially the Net Billing Tariff).

What changed: Under NEM 3.0, new solar customers no longer get full retail credit for exported power. Instead, exports are valued at “avoided cost” rates that are roughly 75% lower than before. Where a NEM 2.0 customer might have earned ~$0.30/kWh for exports, a NEM 3.0 customer earns closer to $0.05–$0.08/kWh, with rates that vary by hour and season.

Why it matters: This dramatically reduced the value of exporting surplus solar in California. The practical consequence is that batteries went from optional to almost essential for good California solar economics. Instead of exporting cheap midday power and buying it back expensive at night, NEM 3.0 customers store their own solar in a battery and use it in the evening — capturing the full retail value themselves rather than selling low and buying high.

If you’re in California and getting solar quotes in 2026, assume you’re on NEM 3.0 and model the system with a battery. A panels-only system under NEM 3.0 has much weaker economics than it did under NEM 2.0. Our battery storage guide walks through exactly when storage pencils out under these rules.

Net Metering Status by State in 2026

Net metering policy is set at the state level (and sometimes by individual utilities), so it varies widely. A general lay of the land:

Strong full-retail net metering (export ≈ retail rate):

• New York, Massachusetts, New Jersey, Connecticut, Rhode Island
• Colorado, Minnesota, Wisconsin, Illinois
• Most of the Northeast and Mid-Atlantic

Modified / reduced net metering (export below retail):

• California (NEM 3.0 — heavily reduced, batteries strongly favored)
• Arizona (export credit below retail, set by utility)
• Nevada (reduced after the 2015 rollback, partially restored, still below retail)
• Hawaii (no traditional net metering for new customers; self-consumption + storage programs instead — but very high rates keep solar attractive)

No statewide net metering / utility-dependent:

• Texas (no statewide mandate — each utility/retail provider sets its own buyback plan; some are generous, many are poor)
• Mississippi, Alabama, South Dakota, Tennessee

Phasing down or under review:

• Indiana (transitioning away from full retail)
• A number of states periodically revisit their rules, so always confirm what’s current.

Check your specific situation on our state pages — each lists whether broad net metering is available — and verify with your actual utility, because in states without a statewide rule, the policy is set utility by utility.

Key Net Metering Details to Ask About

Not all “net metering” is equal. Before signing a solar contract, get clear answers on these:

1. What’s the export rate? Is it full retail, a fixed reduced rate, or an hourly avoided-cost rate? This single number drives your payback.

2. What’s the true-up period? Many programs settle credits annually. If you over-produce across the year, do you get paid for the surplus, and at what rate? Often surplus is “trued up” at a low rate or even forfeited — so oversizing your system past 100% of usage can be wasted money.

3. Do credits roll over or expire? The best programs let unused credits roll month to month. Some reset.

4. Are there new fixed charges? Some utilities have added monthly “grid access” or “solar customer” fees that eat into savings. Factor these in.

5. Is there a time-of-use (TOU) component? Under TOU rates, the timing of your export matters. Power exported during expensive peak hours is worth more than midday power. This interacts with whether a battery makes sense.

6. Are you grandfathered? When rules change (as with NEM 2.0 → 3.0), existing customers are often locked into the old, better terms for a set period (e.g., 20 years). If your state is considering changes, installing sooner may grandfather you into better rules — one of the few legitimate “act sooner” arguments left in 2026.

How Net Metering Interacts With Batteries

The weaker your net metering, the more valuable a battery becomes. The logic:

• Strong net metering: the grid is your free battery. A physical battery adds resilience but little financial return — you’re already getting full value for exports.
• Weak net metering (e.g., NEM 3.0): exporting is a bad deal, so storing your own solar to use later captures far more value. The battery earns the spread between the retail rate you avoid and the low export rate you’d otherwise get.

This is the central reason California solar quotes in 2026 almost always include storage, while a homeowner in Massachusetts with full net metering might rationally go panels-only.

The Bottom Line

Net metering is the quiet policy that determines how much your solar is actually worth. In full-retail states, it can shave years off your payback and make a battery optional. In reduced-net-metering states like California under NEM 3.0, it reshapes the entire decision toward storage. With no federal tax credit in 2026, getting net metering right is one of the most important things you can do to make solar pencil out.

Before you commit: confirm your export rate, true-up terms, and any new fees with your specific utility. Then run your numbers with our solar savings calculator and read up on whether solar is worth it in your state and the state incentives you can still claim in 2026.