If you’re researching solar, you’ve probably seen “net metering” mentioned as one of the biggest factors in whether a system pays off quickly or slowly — and for good reason. After your local electricity rate, your state and utility’s net metering policy is the single biggest variable in solar payback, and the rules have been shifting fast across the country. This guide explains exactly how net metering works, how it differs from the newer “net billing” model replacing it in some states, and what the policy landscape actually looks like state by state in 2026.
What Net Metering Actually Is
Net metering is the billing arrangement that determines how much credit you receive when your solar panels produce more electricity than your home is using at that moment. Since solar panels generate the most power during midday — often more than a typical home is consuming right then — that excess flows back out to the grid instead of going to waste. Net metering is the policy that credits you for it.
Because export credits can change the financial return of a solar system, read our guide on how long it takes for solar panels to pay for themselves to understand how utility policies affect payback.
Think of it as your utility meter running in reverse during those high-production hours: your meter tracks the net difference between what you draw from the grid and what you send back, and you’re billed (or credited) based on that net figure over the billing period, rather than treating every kWh you use and every kWh you export as entirely separate transactions.
For additional background on residential solar and connecting a system to the grid, consult the U.S. Department of Energy’s Homeowner’s Guide to Going Solar.
Full Retail Net Metering: How the “Classic” Version Works
Under full retail net metering (the original, most favorable version of this policy), every kWh you export to the grid is credited at the same rate you’d otherwise pay to buy a kWh from your utility. If your rate is $0.22/kWh, exporting a kWh earns you a $0.22 credit — a genuine one-to-one swap in value, even though the physical electricity itself is worth less to the utility than that retail price reflects (since retail rates include delivery, infrastructure, and other costs beyond just the raw electricity).
This 1:1 structure is what made solar economics so favorable in states that maintained it, since it means excess daytime production effectively offsets your evening and nighttime grid usage at full value, without needing a battery to “store” that value yourself.
Net Billing: The Newer, Less Favorable Alternative
A growing number of states and utilities have shifted away from full retail net metering toward a different structure called net billing (sometimes called “net metering 2.0/3.0” or an “avoided cost” model). Under net billing, your exports are credited at a separate, typically lower rate — often called the utility’s “avoided cost” (roughly what it would have cost the utility to generate or purchase that electricity elsewhere), rather than the full retail rate you pay when buying power.
Your electricity rate structure also matters. See our guide to the best time-of-use electricity plans in 2026 to understand how peak and off-peak pricing can affect the value of solar energy.
The difference in value can be substantial. Under California’s NEM 3.0 (technically a Net Billing Tariff, effective April 2023), export credits dropped by roughly 75% compared to the prior full retail system — self-consumed solar energy might save a homeowner $0.30-$0.55/kWh, while exported energy under NEM 3.0 might earn only $0.05-$0.08/kWh. That gap is the single biggest reason battery storage has become far more central to the solar conversation in states that have made this shift — see our guide on [how much can you save monthly with solar plus battery] for the fuller picture on why.
Net Metering vs. Net Billing: The Key Distinction
| Net metering (full retail) | Net billing | |
|---|---|---|
| Export credit rate | Same as retail purchase rate | Separate, usually lower “avoided cost” rate |
| Value of self-consumption vs. export | Roughly equal | Self-consumption worth significantly more |
| Battery storage incentive | Lower | Much higher |
| Typical solar payback impact | Shorter | Longer, unless paired with a battery |
The State-by-State Picture in 2026
Net metering policy varies enormously by state — and often by specific utility within a state — making this one of the most location-dependent pieces of the entire solar decision. As of 2026:
States with strong, full-retail net metering
States including New Jersey, Massachusetts, Maryland, New York, Illinois, and Colorado maintain full 1:1 retail-rate net metering as of 2026, generally the most favorable environment for straightforward solar payback without requiring a battery to capture full value. New Jersey’s policy is frequently cited as among the strongest nationally, combining full 1:1 credit with an additional per-MWh incentive payment structure.
States that have shifted to net billing
California’s NEM 3.0 remains the most consequential and widely-referenced shift nationally, but it’s not alone — parts of Arizona, Nevada, and Hawaii have also moved to reduced export-rate structures in recent years, and several additional states have utility filings or dockets actively under consideration that could shift their policy further by 2027.
States without a statewide mandate
States including Texas, Georgia, Alabama, and South Carolina don’t have a statewide net metering requirement at all — net metering availability in these states depends on individual utilities choosing to offer it voluntarily, and where it is offered, it’s sometimes at below-retail rates. If you’re in one of these states, confirming your specific utility’s policy directly (rather than assuming a statewide standard applies) is an essential step before evaluating solar economics.
The general trend
Across the country, the broader direction of policy change has been away from full retail net metering and toward net billing, as utilities argue that full retail credits shift grid-maintenance costs onto non-solar customers, and regulators in a growing number of states have found this argument persuasive. That said, several states — including Oregon, which passed legislation preserving retail-rate net metering through at least 2028 — have taken active legislative steps to protect the more favorable structure, so the trend isn’t universal or inevitable everywhere.
What Happens If Policy Changes After I Already Have Solar?
This is one of the most common and reasonable concerns, and the answer is generally reassuring: most net metering policy changes grandfather existing customers under the rules that applied when their system was approved, typically for an extended period. California’s NEM 3.0 transition, for example, grandfathered existing NEM 2.0 customers for 20 years from their original permission-to-operate date. This is worth confirming specifically for your state and utility before installing, but it means a policy shift after you go solar generally doesn’t retroactively apply to your existing system.
What Is a “True-Up”?
Most net metering programs operate on an annual true-up cycle rather than settling your solar credit balance every single month. Throughout the year, you accumulate credits during high-production months (typically spring and summer) and draw them down during lower-production months (typically winter) — at the end of your annual true-up period, your utility calculates your net position for the full year and bills or credits any remaining balance. This is why a single month’s bill isn’t the full picture of how your solar credits are performing; the annual true-up is the number that actually matters most.
How Net Metering Policy Affects System Sizing
Your local net metering policy directly affects how your solar installer should size your system:
- Under full retail net metering, oversizing your system somewhat (up to your state’s allowed cap) is often still economically sound, since exports retain their full value.
- Under net billing, the economically optimal approach generally shifts toward sizing for higher self-consumption — commonly targeting 60-80% of your annual usage covered directly by real-time solar production, rather than maximizing total export, since export value is significantly discounted under this structure.
System size is only one part of the financial decision. Our solar installation cost breakdown for 3kW, 5kW, and 10kW systems explains how installation costs vary with system capacity.
How to Check Your Specific Policy
- Database of State Incentives for Renewables & Efficiency (DSIRE) for state-level renewable energy policies and incentives, then confirm the current export-credit rules directly with your utility. The authoritative national source for current, utility-specific net metering and net billing policies.
- Ask your solar installer directly what compensation structure applies to your specific utility, and ask them to model your expected annual true-up under that structure, not just projected production.
- Confirm whether a policy change is pending in your state, since several dockets and utility filings are active in various states as of 2026 and could affect future installations even if the current policy remains favorable today.
Once you confirm your utility’s export-credit rules, use our Solar Payback Calculator for an initial estimate of your system’s payback period. For a more realistic result, use a current installation quote and savings estimates based on your utility’s actual rates and credit policy.
Final Thoughts
Net metering — and increasingly, net billing — is one of the most consequential, location-specific variables in the entire solar decision, often mattering as much as your local electricity rate in determining how quickly a system pays for itself. States with full retail net metering (New Jersey, Massachusetts, Maryland, New York, Illinois, Colorado, among others) generally offer more straightforward solar economics, while states that have shifted to net billing (California’s NEM 3.0 being the most prominent example) have made battery storage a much more central part of getting good value from a system. Checking your specific state and utility’s current policy — rather than assuming a national standard — is essential due diligence before evaluating any solar quote.