Net Metering vs Net Billing: How Your Utility Credits Solar Power

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Net metering vs net billing comes down to one number: the rate your utility credits you for each kilowatt-hour (kWh) of solar power you send back to the grid. Under full retail-rate net metering, an exported kWh earns the same credit as a kWh you buy, a one-to-one trade. Under net billing, exports are credited at a separate, usually much lower, rate tied to what the utility would otherwise pay for wholesale power.

That single difference can swing a solar payback by several years. One worked example, cited by TRB, describes an 11,000 kWh-per-year home with 40% of production exported: cutting the export credit from 35 cents to 7 cents per kWh substantially reduces the annual value of exports and stretches payback from about 6.5 to about 9.5 years (illustrative example from the related analysis on theroofingbrief.com).

This article explains how each structure works, why utilities and regulators have been shifting away from retail-rate net metering, and how to find out which policy applies to your home before you sign a solar contract.

Key takeaways

• The export credit rate is the biggest lever in solar economics. Per Solar Savings Compare, net metering policy is now the single biggest determinant of residential solar economics, more important than panel cost or installer choice.
• Net metering means 1:1 credits. Every kWh you export offsets a kWh you would otherwise buy at the full retail rate.
• Net billing means two rates. Imports are billed at retail; exports are credited at a separate rate, often an avoided-cost or time-of-use export rate that is significantly lower.
• Rules are changing fast. Per GreenEnergyCalc's summary of the NC Clean Energy Technology Center's 50 States of Solar reporting, distributed solar policy activity remained frequent in 2026, with net metering among the most commonly addressed topics; check the latest report for current figures.
• Confirm your utility's tariff before signing anything. Policies vary by state and even by utility within a state, and legacy customers are often grandfathered under older rules.

What net metering actually is

Net metering is a billing arrangement, not a physical device. Your utility installs a bi-directional meter that measures electricity flowing two ways: from the grid into your home, and from your solar panels back onto the grid. At billing time, the utility nets the two flows and bills you on the difference.

Under full retail-rate net metering, sometimes called true 1:1 net metering, every kWh you export earns a credit equal to the full retail rate you pay for grid imports. As Solar Savings Compare notes, this was the dominant US policy through roughly 2015 and remains the most generous structure for solar owners.

In practice, that means a well-sized system can reduce a bill to nearly zero, with credits earned in sunny months covering usage in darker months, as described in Solantiq's state guide. Exports generate credits that offset nighttime, cloudy-day, and winter usage, and a monthly or annual true-up settles the net balance.

What net metering is not

It is also worth clearing up common confusion. Net metering is not a payment program: policies generally issue bill credits rather than cash, and the details, including any cash-out provisions, depend on your utility's tariff. And it is not guaranteed to last forever; states have revised their tariffs repeatedly, which matters because existing customers are often grandfathered while new customers get the newer, less generous terms.

What net billing is, and why it pays less

Net billing separates the two sides of your bill. Imports are still billed at the retail rate, but exports are credited at a separate rate set by your utility commission. That export rate is frequently an avoided cost rate, which reflects roughly what the utility would pay for an alternative source of power on the wholesale market, not what it charges customers at retail.

Because retail rates include costs beyond the raw energy itself, such as grid infrastructure and other fixed charges that solar exports do not offset, avoided cost rates are usually far below retail. The gap between the two rates is the entire reason net billing solar savings are lower than net metering savings on an identical system.

California illustrates the shift. Its net billing tariff, known as NEM 3.0, applies to interconnection applications filed on or after April 15, 2023, according to the CPUC NEM Revisit page as cited by TRB. Customers who interconnected under the earlier NEM 1.0 and NEM 2.0 tariffs stay on their legacy retail-rate arrangements. TRB notes that retail import rates in California are high relative to most of the country, while export credits under net billing vary by time of day and are much lower on average.

How the two structures change your savings math

The size of your export credit matters because most residential systems export a meaningful share of what they produce. Household electricity use often does not line up perfectly with midday solar production, so some surplus power flows to the grid and is later offset through export credits.

A worked example (illustrative)

TRB's example assumes a home using 11,000 kWh per year and exporting 40% of its solar production:

• Based on the example's own assumptions (roughly 4,400 kWh exported per year), a 35 cents per kWh export credit would be worth about $1,540 per year, with payback of about 6.5 years.
• At 7 cents per kWh, the same exported energy would be worth about $308 per year under those assumptions, roughly $1,230 less, and payback stretches to about 9.5 years. Note that TRB's own summary figures do not fully match this arithmetic, so treat all of these numbers as illustrative rather than verified.

These figures are illustrative and depend entirely on your utility's actual rates, your usage pattern, and your system size. But the direction is consistent: the lower the export credit, the more your savings depend on using solar power on-site rather than exporting it.

Why this pushes homeowners toward batteries

Under net billing, a kilowatt-hour stored in a home battery during the cheap midday export window and consumed in the evening can be worth far more than the same kWh exported to the grid. That is a major reason export-rate reforms have changed the battery conversation. If your utility uses net billing, sizing a system for high self-consumption and considering storage can matter as much as panel count, because storage can increase the value you get from each kilowatt-hour.

For background on how credits work in general, see our guide, Net Metering Explained: How You Get Credit from Utility Companies.

Which states use which policy?

There is no single national rule. Compensation falls into broad categories, and which one applies depends on your state and sometimes your specific utility.

• Full retail-rate net metering: Exports credited at the retail rate. TRB notes this applies to California's legacy NEM 1.0 and NEM 2.0 customers and to most states with traditional policies.
• Reduced-credit programs: Exports credited at a rate below retail but structured differently from a pure avoided-cost export rate, sometimes with adders or performance incentives.
• Net billing: Imports and exports billed separately, with exports at a commission-set, usually lower, rate.

According to Solar Savings Compare, the same physical system on the same roof can produce roughly a 7-year payback in Massachusetts and a 13-year payback in a nearby state with weaker export compensation, which shows how much policy, not hardware, drives the outcome. Solantiq likewise frames the range as the difference between roughly 6-year and 12-year paybacks depending on local rules.

Some states layer additional incentives on top. Solantiq's guide points to Massachusetts, for example, where credits roll over indefinitely month to month, annual cash-outs occur at avoided cost, and the SMART program provides additional performance incentives beyond the bill credit itself.

How to find out which policy your utility uses

Because rules change frequently, treat any guide, including this one, as a starting point and verify with your utility. Here is a practical checklist.

1. Search your utility's tariff sheets. Look for terms like "net metering," "net billing," "successor tariff," or "export compensation" on your utility's rate schedule pages.
2. Check your state's interconnection rules. Your state public utility commission website will list current distributed generation tariffs and any recent reforms.
3. Ask your installer to put the export rate in writing. A reputable installer should state, in the quote, which tariff your system will interconnect under and the current export credit rate, including whether it varies by time of day.
4. Ask about grandfathering. If your state recently changed its rules, confirm whether existing customers keep the older tariff and for how long. California's NEM 1.0 and 2.0 customers, for example, remain on legacy tariffs even after NEM 3.0 took effect for new applications.
5. Confirm the true-up mechanics. Find out whether credits roll over month to month, whether they expire annually, and what rate applies if the utility cashes out leftover credits.

For a broader state-by-state overview as of 2026, Solar Savings Compare's Net Metering: The Complete State-by-State Guide and GreenEnergyCalc's Net Metering by State 2026 both track which structures states currently use. GreenEnergyCalc notes the NC Clean Energy Technology Center's Q2 2026 report counted 53 net-metering-related actions in a single quarter, so the landscape is genuinely moving.

Why export credit rates keep changing

The shift from retail-rate net metering toward net billing reflects a policy debate that has run for years. Utility commissions weigh the value solar exports provide to the grid, including reduced peak demand and avoided infrastructure, against the argument that retail-rate credits shift fixed grid costs onto non-solar customers.

The result has been a patchwork. Some states preserved full retail net metering, some adopted reduced credits with transitional adders, and others, most prominently California, moved new customers to time-varying net billing. With the federal 25D residential clean energy credit ended for expenditures after December 31, 2025, as GreenEnergyCalc notes, state export rules and your utility's tariff now carry even more weight when you compare quotes. (This article is not tax advice; confirm your situation with a tax professional.)

What this means if you are shopping for solar now

• Model your savings using your actual tariff's export rate, not a generic national average.
• If exports are credited low, prioritize self-consumption by using more of your solar power directly at the time it is produced, where your household's circumstances allow.
• Compare quotes with and without battery storage, since storage changes the value of every exported kWh under net billing.
• Be skeptical of any sales pitch that promises specific payback periods or savings. Rates and usage vary, so it is reasonable to ask any installer to show the ranges and assumptions behind their numbers.

FAQ

Is net billing the same as no compensation for solar exports?

No. Under net billing you are still credited for exports, just at a lower, separately set rate, often tied to avoided cost or time-of-use values. The credit is real; in many net billing tariffs it is worth less per kWh than a full retail-rate net metering credit would be, though the exact rate depends on your state and utility.

Which is better for homeowners, net metering or net billing?

All else equal, full retail-rate net metering delivers higher savings on the same system because each exported kWh offsets a full-price kWh. But "all else" is rarely equal: import rates, time-of-use structures, battery economics, and state incentives differ, so compare actual quotes under your actual tariff rather than judging the policy label alone.

If my state switches to net billing, do I lose my current credits?

Usually not immediately. Many reforms grandfather existing customers under the older tariff for a set period or indefinitely. California's NEM 1.0 and NEM 2.0 customers, for instance, remain on legacy tariffs even though new applications since April 15, 2023 fall under NEM 3.0. Confirm your utility's specific grandfathering terms.

Does a battery make sense under net billing?

Often, yes, because storing midday surplus for evening use can be worth more than exporting it at a low avoided-cost rate. Under full retail net metering the case is weaker, since exports already earn full retail value. Model both scenarios with your utility's actual rates.

Do I still get credited during a power outage?

Net metering credits are a billing mechanism, not a backup power source. During an outage, a standard grid-tied solar system shuts down for safety unless it has battery backup or a special inverter setup. For details, see Do Solar Panels Work During a Power Outage?

Conclusion: check your tariff before you commit

The net metering vs net billing question is not academic; it is the difference between exports earning full retail value and earning a fraction of it, and on an 11,000 kWh home that gap was worth over $1,200 a year in one illustrative example. Before signing a solar contract, identify your utility's export compensation structure, get the current export rate in writing, and model savings under your actual tariff. If your state uses net billing, it is also worth understanding how equipment choices affect self-consumption; our comparison of microinverters vs power optimizers covers one piece of that decision.

Sources

• Net Metering: The Complete State-by-State Guide (2026) | Solar Savings Compare
• Net Metering by State 2026: Rules, Credits & Changes | GreenEnergyCalc
• Net Metering Changes 2026: How It Works & States | TRB
• Net Metering Policies by State: Complete US Guide 2026 | Solantiq Solar Calculator

This article is general information, not tax, legal or financial advice. Figures are illustrative; confirm current rules and incentives with the official program or a qualified professional. HomeSolarStudio.com is a Powur Ambassador. Learn more