Net Metering Guide by State: NEM Rules & Buybacks

Net energy metering (NEM) is the policy engine behind the residential solar boom. In its simplest form, net metering is a billing mechanism that credits you for the excess electricity your solar panels feed back into the grid.

When your panels produce more power than your home is consuming, your electric meter literally spins backward (or digitally counts down), building up credits that offset the electricity you import when the sun isn’t shining.

However, the regulatory landscape of net metering is shifting rapidly. Utilities are lobbying state public utility commissions to replace standard retail credits with net billing models.

Let’s examine how net metering operates and how rules differ across major US states.

How Net Metering Regimes Work

The economic value of net metering is determined by the exchange rate established by your utility. There are three main structures:

1. Retail Net Metering (1-to-1): The ideal billing structure for solar owners. The utility credits exported solar energy at the exact same retail rate you pay to import it. If your rate is $0.18/kWh, you receive $0.18/kWh for exports.
2. Net Billing: The utility credits exports at a lower wholesale or avoided-cost rate (typically $0.04 to $0.08 per kWh), while continuing to charge full retail rates for imports. This makes exporting power unprofitable and incentivizes battery storage.
3. Time-of-Use (TOU) Net Metering: The value of your solar credit varies depending on the time of day. Under TOU, solar generated at noon might be worth less (mid-peak), while battery power discharged during the hot summer afternoon and evening (peak) receives premium credit rates.

State-by-State Net Metering Landscapes

Net metering is governed at the state level, creating a patchwork of rules across the country.

California (NEM 3.0 / Net Billing)

In April 2023, California implemented the Net Billing Tariff (known as NEM 3.0). It reduced solar export credits by approximately 75-80%.

• The Impact: Under NEM 2.0 (retail metering), standalone solar had a short payback of 5 to 6 years. Under NEM 3.0, standalone solar payback extended to 12+ years.
• The Battery Solution: By adding a battery to store excess solar for self-consumption during peak hours, homeowners can bypass the low export rates, reducing payback back down to 7 to 9 years.

Florida (1-to-1 Retail Metering)

Florida continues to mandate 1-to-1 retail net metering for investor-owned utilities like Florida Power & Light (FPL) and Duke Energy.

• The Impact: Standalone solar is highly lucrative, delivering short payback timelines. Homeowners do not need batteries for financial reasons, only for emergency storm backup.

Texas (REP-Driven Deregulated Market)

Texas does not have a statewide net metering mandate for its deregulated competitive energy market (ERCOT).

• The Impact: Net metering depends on your Retail Electric Provider (REP). Companies like TXU Energy, Chariot Energy, and Pulse Power offer custom “Solar Buyback Plans.” Some pay 1-to-1 credits up to your usage limit, while others pay avoided-cost rates or do not credit excess generation at all. Homeowners must shop REPs diligently.

New York (VDCRE / Phase-Out)

New York has transitioned from standard net metering to the Customer Benefit Contribution (CBC) charge.

• The Impact: While solar owners still receive retail-rate credits, they pay a small monthly capacity charge (based on system size) to support grid maintenance. This slightly dampens but preserves robust solar economics.

The Annual Credit Rollover Rules

Another critical detail is what happens to excess credits at the end of the year. Utilities handle this in one of three ways:

• Indefinite Rollover: Credits roll over month-to-month, year-after-year.
• Avoided-Cost Payout: At the end of a designated billing cycle (usually April or October), any accumulated credits are cashed out at the utility’s wholesale rate (about $0.03/kWh) and your credit balance resets to zero.
• Forfeiture: Any remaining credits at the end of the annual cycle are forfeited to the utility without compensation.

Operational checklist before you commit

1. Identify your local utility provider and search for their net metering policy.
2. Check if you are forced onto a Time-of-Use (TOU) rate plan when installing solar.
3. Understand the utility's policy on credit expiration (annual cash-out vs. rollover).
4. Model your payback timeline using local export rates rather than retail averages.

Frequently asked questions

What is California's NEM 3.0?

NEM 3.0 is California's solar billing tariff introduced in 2023. It cut solar export credits by roughly 75-80% but increased the financial incentive to install home battery storage.

Do solar credits roll over month-to-month?

Under most net metering rules, credits roll over monthly to offset future usage. However, many utilities clear credits annually at a lower wholesale rate.

Final takeaways

Net metering is the single most important regulatory policy affecting your solar savings. Knowing your utility's specific export rules before signing a contract prevents post-installation bill surprises.