Net Metering Explained

Net metering is the billing arrangement that lets a solar homeowner send surplus electricity back to the grid and get credited for it, usually at or near the retail rate they would otherwise pay. It is one of the single biggest factors in whether solar pays for itself in a given state. It determines how much a kWh of excess solar production is actually worth. That value applies once the sun goes down and the household draws power back from the grid.

This guide explains how net metering actually works. It covers the different policy types states use in 2026, which are not all the same. That difference is worth thousands of dollars over a system’s life. It also explains how to read your utility bill under net metering, and what to check before assuming your state’s program works the way a neighbor’s does.

Table of Contents

• How Net Metering Works
• Net Metering Policy Types Compared
• Reading Your Bill Under Net Metering
• The Interconnection Process
• Why State Rules Differ So Much
• Sizing a System Around Net Metering
• Worked Example: Full Retail vs. Net Billing
• State Policy Spotlight: Recent Changes
• When Net Metering Isn’t Available: Alternatives
• Net Metering and Time-of-Use Rates
• Community Solar as an Alternative
• Common Net Metering Mistakes
• Frequently Asked Questions

How Net Metering Works

A net-metered home keeps a single bidirectional meter (or two meters netted against each other) that tracks electricity flowing both ways. When solar production exceeds household use during the day, the surplus flows out to the grid and is credited to the account. At night or on low-production days, the home draws power back and those credits are drawn down first. At the end of the billing cycle – monthly in some utilities, annually in others – the homeowner is billed only for net consumption, not gross consumption.

The key variable is the credit rate. Full retail net metering credits exported power at the same rate you pay for imported power. A kWh sent out is worth exactly a kWh drawn back. Weaker policy types credit exports at a lower rate, which changes solar payback math substantially even for an identical system and identical usage pattern.

Net Metering Policy Types Compared

As of 2026, US states use several distinct net metering structures rather than one standard:

Because export credit value varies this much, the same 8kW rooftop system can have a meaningfully different payback period in a full-retail state versus a net-billing state – this is why payback period estimates should always be run with your actual local policy, not a national average.

Reading Your Bill Under Net Metering

A net-metered bill typically shows gross generation, gross consumption, net kWh billed, and a running credit balance (often called a “true-up” balance) carried forward from prior months. Most utilities true up annually on a set month, paying out or zeroing any remaining credit balance at that point. Read your utility’s specific true-up policy. A system oversized relative to usage can end up donating unused annual credits back to the utility at a low compensation rate rather than banking them indefinitely.

Why State Rules Differ So Much

Net metering is regulated at the state (and sometimes individual utility) level in the US, not federally, which is why programs vary so widely. States with strong renewable portfolio mandates and deregulated utility markets have historically favored full-retail net metering to accelerate adoption. Some states have vertically integrated utilities facing cost-shift arguments. That is the claim that non-solar customers subsidize solar customers’ grid use. Those states have moved toward net billing, or added fixed grid-access fees for solar customers specifically. Utility-level tariff changes can also happen mid-program. Check whether your specific utility’s current tariff is grandfathered for existing solar customers or applies retroactively. Do that before assuming a quote reflects your long-term reality.

Sizing a System Around Net Metering

Under full-retail net metering, sizing a system close to 100% of annual usage is usually optimal. Excess beyond that earns diminishing value. Once annual credits exceed what true-up compensates fairly, the extra capacity stops paying. Under net billing, the better-value approach is often a smaller solar array paired with a home battery. Size it to maximize self-consumption rather than export. Exports are worth far less than the retail rate you would otherwise pay to avoid drawing from the grid. See our home battery storage guide for sizing a battery specifically around this kind of self-consumption strategy.

When Net Metering Isn’t Available: Alternatives

A minority of utilities offer no net metering at all, instead using a straight buy-all/sell-all arrangement or a flat, low export rate regardless of import price. In these territories, the economics shift heavily toward self-consumption. Size solar to closely match daytime load. Pair it with storage to shift evening consumption. In some cases, a community solar subscription is an alternative to a rooftop system entirely, buying a share of a remote solar farm’s output credited to your bill.

Worked Example: Full Retail vs. Net Billing

The dollar difference between policy types is easiest to see with a simple worked example. Assume a household exports 4,000 kWh per year it does not use immediately, on a utility charging $0.16/kWh retail:

That is roughly a 5x difference in the value of identical exported electricity, based purely on policy. It is why the same system size and same household usage can show payback estimates ranging from under 6 years to over 12. The only variable is which utility territory it sits in. This is also the mathematical reason net-billing states have seen a sharp rise in home battery attach rates. Shifting that 4,000 kWh from exported-at-a-discount to self-consumed-at-full-retail-value-avoided is the whole point. It is worth the $256 to $520 difference every single year the system operates.

State Policy Spotlight: What Changed Recently

Net metering policy is not static. Several notable shifts have reshaped the market in recent years. They are worth understanding even if they do not apply to your exact state, because they show the direction utility regulators have been moving.

• California’s shift to net billing (NEM 3.0) – replaced the state’s long-standing full-retail program with export credits tied closely to wholesale/avoided-cost value, which dropped substantially below the old retail rate and significantly increased battery attach rates on new California solar installs.
• Utility-by-utility variation within a single state – some states leave net metering policy to individual investor-owned utilities rather than setting one statewide rule, so two households in the same state on different utilities can have meaningfully different export economics.
• Grandfathering fights – several proceedings nationally have tested whether existing solar customers keep old terms when a state moves to a new policy; outcomes vary, but grandfathering for a fixed number of years (rather than indefinitely) has become the more common regulatory compromise.
• Added fixed grid-access fees for solar customers – a growing number of utilities have introduced a flat monthly charge specific to net-metered customers, framed as covering fixed grid costs regardless of net consumption; this reduces effective savings even where the per-kWh credit rate itself is unchanged.

None of this changes the fundamentals of how net metering works. It does mean a policy snapshot from even two or three years ago may already be outdated for a given utility. Verify current terms directly with the utility, or with your installer’s latest interconnection paperwork. Do not rely on older articles, including this one over time, for the exact current rate.

Net Metering and Time-of-Use Rates

Many utilities that still offer 1:1 net metering have simultaneously moved most customers onto time-of-use rate plans. These charge different prices depending on the hour, not just a single flat rate. This interacts with net metering in a way that surprises some new solar owners. If your export credit is valued at the TOU rate in effect at the moment of export, timing matters a lot. Midday TOU prices are often lowest, since that is when regional solar supply is highest. So midday solar exports can be credited at a lower rate than the evening peak rate you pay when drawing power back a few hours later. This happens even under an otherwise 1:1 program. This is sometimes called a “duck curve” effect at the individual-bill level, mirroring the same daily supply curve utilities see at the grid level. A battery that shifts self-consumption into the evening peak captures the full peak-rate value instead. That is why TOU-rate solar households increasingly pair storage with solar. It happens even in states that technically still offer full retail net metering.

Community Solar as a Net Metering Alternative

Not every household can install rooftop solar – renters, shaded lots, HOA restrictions, or roofs needing replacement all rule it out for a meaningful share of the market. Community solar programs let a subscriber buy a share of a larger, remote solar installation. The subscriber receives bill credits proportional to that share’s output. The mechanism is similar to net metering, but there are no panels on the subscriber’s own property. Availability and credit structure vary widely by state. Some programs offer close to retail-rate value, others considerably less. Program availability itself is also limited to specific states and utility territories. See our dedicated guide on solar incentives for renters for how this option compares to rooftop ownership specifically for households that can’t install their own system.

The Interconnection Process, Briefly

Getting net metering active is a separate administrative step from getting solar installed. After physical installation, your installer submits an interconnection application to the utility. The utility reviews and approves the system, sometimes requiring a physical inspection or a meter swap to a bidirectional model. Only after that approval, called permission to operate or PTO, can the system legally export to the grid and start accruing credits. This process commonly takes anywhere from a few days to several weeks, depending on the utility’s backlog. In some jurisdictions, running the system before PTO can jeopardize the interconnection agreement. Confirm your installer’s PTO timeline expectations before assuming your system earns credits from the day the panels go up.

Common Net Metering Mistakes

• Assuming a neighbor’s deal applies to you – even within one state, utility-level tariffs and grandfathering dates differ.
• Oversizing relative to usage under a weak export-credit policy – wastes money on panels whose output is worth far less than retail.
• Not checking the true-up date and policy – can result in forfeiting a credit balance you assumed carried over indefinitely.
• Ignoring pending legislation – several states have active proceedings that could change net metering terms for new applicants; a signed interconnection agreement typically locks in current terms, but delays in installation can push you into a new tariff.

Frequently Asked Questions

Is net metering the same in every state?
No – it is regulated at the state and often utility level, and 2026 policy ranges from full 1:1 retail credit to wholesale-rate net billing to no net metering at all in some territories.

Does net metering expire or change after I install solar?
Depends on the program – many states grandfather existing solar customers under the tariff in place when they interconnected, for a set number of years (often 10-25). New applicants after a policy change get the new terms. Confirm grandfathering explicitly with your utility before signing a contract.

Can I get paid cash for excess solar credits instead of a bill credit?
Rarely for residential net metering – most programs only bank credits against future usage and zero out (or pay a small avoided-cost rate for) any remaining balance at true-up, rather than issuing a cash payment.

Does adding a battery change how net metering works?
A battery does not change the utility’s billing rules, but it changes your strategy under them – instead of exporting daytime surplus for a possibly low credit, you store it and use it in the evening, which is more valuable under weak net-billing policies specifically.

How do I find my exact utility’s net metering policy?
Check your utility’s tariff filings (usually on their website under “rates” or “net metering”) or your state public utilities commission site – DSIRE (the Database of State Incentives for Renewables and Efficiency) is also a widely used reference for current program details by state.

What is the difference between net metering and net billing?
“Net metering” is often used loosely to cover any export-credit arrangement, but strictly, net metering means exports are credited near or at the full retail rate, while net billing credits exports at a lower wholesale or avoided-cost rate – the worked example above shows why that distinction is worth hundreds of dollars a year.

Will my export credit rate stay the same for the life of my solar system?
Only if you are grandfathered under your original interconnection tariff, and only for however many years that grandfathering period lasts (commonly 10-25 years, but this varies) – after that, or if you were never grandfathered, your credit rate can follow whatever the current tariff is.

Do I need permission from my utility before turning on my solar system?
Yes – running the system before receiving Permission to Operate (PTO) from the utility can violate your interconnection agreement in many jurisdictions. Wait for formal PTO approval, which your installer typically coordinates.

Households running an EV should also check how net metering interacts with off-peak charging credits – see our solar EV charging guide for that combined math.

Conclusion

Net metering policy is often the single biggest lever in whether solar pays back quickly or slowly in a given location. It matters more than panel efficiency or system size. Confirm your exact utility’s policy type, export credit rate, and true-up rules before finalizing system size, and revisit our solar tax credits guide and payback period guide to see how incentives and export credits combine in your specific case.

Further reading: Net metering – overview (Wikipedia), Wikipedia – Net metering, and DSIRE – Database of State Incentives for Renewables and Efficiency.

Export rules are only half the story; the other half is covered in time-of-use rates and solar.

Buyers inheriting an existing array should also read buying a house with solar panels.