Net Metering: How It Works by State

Overview

Net metering is the billing arrangement that determines what happens when a home's solar system sends excess electricity to the grid. In the classic version, exported electricity earns a bill credit that can offset electricity the home buys later. For years, many solar proposals treated that arrangement as standard. It is no longer safe to assume that.

Today, compensation for exported solar varies sharply by state and often by utility. Some places still use traditional net metering. Some use net billing, where exports are credited at a lower rate. Some use time-based export values or utility-specific tariffs. For homeowners, this is not a regulatory footnote. It is one of the biggest drivers of solar economics.

A system that pays back well under one tariff may pay back poorly under another. That is why any solar proposal that glosses over the exact utility tariff should be treated with caution.

Key Concepts

Net Metering

Under classic net metering, exported electricity earns bill credits that offset later consumption, often at or near the retail rate during the billing cycle.

Net Billing

Under net billing, exported electricity is credited separately from imported electricity and often at a lower value than the retail rate.

Annual True-Up and Carryover Rules

Some utilities let credits roll month to month. Others settle or expire credits at defined intervals. That can materially change annual savings.

Core Content

1) How Traditional Net Metering Works

The Department of Energy describes net metering as a setup where a bidirectional meter tracks both electricity drawn from the grid and excess electricity sent back. In the traditional model, the homeowner pays only for the net difference over the billing period if consumption exceeds generation.

That arrangement is highly favorable to rooftop solar because exported daytime energy offsets later usage at a relatively strong value. It is also the benchmark many older online payback calculators still assume.

2) Why State Differences Matter

Net metering is generally governed at the state and utility level rather than by one national rule. NREL and DSIRE both track state-by-state differences in distributed-generation compensation. As of March 17, 2026, DSIRE's detailed maps show that compensation mechanisms and policy status continue to vary across the country, and many states have moved beyond simple full-retail net metering.

That means homeowners must stop asking, "Does my state have net metering?" and start asking, "What export compensation applies to my utility account and system size?"

3) Net Metering Is Not the Same as Solar Savings

A common sales mistake is to present solar savings as though exported electricity and self-consumed electricity are worth the same everywhere. They are not. In some territories, electricity you use directly inside the home is worth far more than electricity you export.

That difference changes how a system should be designed. It may favor smaller systems, west-facing production, batteries, or specific load-shifting strategies.

4) Questions Homeowners Should Ask

Before signing a contract, ask:

• What exact tariff or compensation program applies to my address?
• Are exports credited in kilowatt-hours, dollars, avoided-cost rates, or time-varying values?
• Do credits expire monthly, annually, or at move-out?
• Is there a system-size cap tied to usage history or transformer limits?
• Are there interconnection fees, minimum bills, or fixed charges that reduce savings?

If the salesperson cannot answer these without guessing, the financial model is not dependable.

5) Why Older Solar Systems and New Solar Systems Can Be Different

Some utilities grandfather existing customers under older terms for a period of years. New customers may face less favorable export rules. That creates a major consumer-protection issue in home sales and system transfers. A buyer should never assume an existing system's compensation terms continue automatically after sale, meter change, or system modification.

6) How Batteries Relate to Export Rules

The lower the export value, the stronger the case for storing energy on site instead of exporting it. That does not mean every low-export state needs batteries. It means the tariff may shift value away from oversized solar-only systems and toward self-consumption strategies.

7) Where to Verify the Rules

The most reliable homeowner workflow is to check the serving utility tariff, the state public utility commission or equivalent regulator, and DSIRE's policy summaries. DOE and NREL resources are useful for understanding the mechanics. The utility tariff controls the bill.

State-Specific Notes

By definition, this topic is state-specific. As of March 17, 2026, states differ on whether they use traditional net metering, net billing, buy-all-sell-all structures, or other export-credit designs. Many states also layer on utility-specific system-size caps, annual settlement rules, or special treatment for cooperatives and municipal utilities. The safe homeowner assumption is that published examples from another state do not apply to your project unless your utility says they do.

Key Takeaways

Net metering is not one national rule. It is a patchwork of state and utility compensation systems.

The value of exported solar can range from very favorable to relatively modest.

Any solar payback estimate is only as good as the tariff behind it.

Homeowners should verify export-credit rules with the serving utility before relying on a sales proposal or sizing recommendation.