What Is Net Metering?
Net metering is a billing arrangement between you and your electric utility that allows your home solar system to export excess electricity to the grid and receive credit for it on your utility bill. When your solar panels produce more power than your home is using — on a sunny afternoon when everyone is at work — that surplus flows to the grid. Your utility meter tracks the export, and you receive a credit that offsets electricity you draw from the grid when your panels are not producing, such as at night or on cloudy days.
Net metering is the financial mechanism that makes residential solar economics work for most homeowners. Without it, excess solar production would simply be wasted or sold at a much lower wholesale rate. Understanding how net metering works — and the important differences between states and utilities — is essential before going solar.
How Net Metering Works Step by Step
- Your solar panels produce electricity during daylight hours. Some is used immediately by your home appliances and lights.
- Surplus production flows to the grid when production exceeds your home\’s real-time consumption. Your utility meter spins backward — or in modern installations, a bidirectional meter records the export.
- Your utility credits your account for the exported electricity, typically at or near the retail rate you pay for grid electricity.
- At night or on cloudy days, you draw from the grid normally. Your bill is calculated on the net difference — what you consumed minus what you exported.
- At the end of the billing period, if you exported more than you consumed, the excess credit typically rolls over to future months. Whether utilities pay cash for excess annual credits varies by state and utility.
Net Metering Rates: Full Retail vs Avoided Cost
The value of net metering depends entirely on the rate at which your utility credits your exported electricity. There are two main approaches:
- Full retail rate net metering: You receive credit for exported electricity at the same rate you pay for grid electricity — typically $0.12 to $0.35 per kWh depending on your location. This is the most financially favorable arrangement for homeowners and is available in approximately 38 states.
- Avoided cost or wholesale rate: Some utilities credit exported solar at the utility\’s wholesale power cost — typically $0.03 to $0.06 per kWh. This dramatically reduces the financial benefit of solar. California\’s NEM 3.0 policy, implemented in 2023, moved toward a lower export rate and significantly changed the economics of solar in that state.
Before going solar, confirm your utility\’s net metering policy and the export credit rate. This single factor can change your payback period by several years.
Net Metering by State: Key Differences
Net metering policy is set at the state level, and rules vary significantly:
- Strong net metering states: Arizona, Colorado, Connecticut, Maryland, Massachusetts, New Jersey, New York, and Texas (some utilities) offer full retail net metering with favorable carryover policies.
- Modified or reduced net metering: California (NEM 3.0), Hawaii, Nevada, and Utah have moved to lower export rates that reduce the financial benefit of net metering for new solar customers.
- No statewide net metering mandate: Alabama, Mississippi, South Dakota, and Tennessee do not have statewide net metering requirements. Individual utilities may offer their own programs.
Net metering policies change frequently as utilities and state legislatures revisit solar compensation structures. Always verify current policy with your specific utility before making a solar investment decision.
Net Metering vs Battery Storage: How They Interact
Homeowners with battery storage systems face a different net metering calculation than those with solar-only systems. Rather than automatically exporting surplus solar to the grid, a battery system captures that surplus first — charging the battery for later use. Electricity only exports to the grid after the battery is fully charged.
In states with strong full retail net metering, solar-only systems without batteries can be economically optimal — the grid essentially acts as a free storage device at full retail value. In states with reduced export rates like California under NEM 3.0, battery storage becomes more financially attractive because storing your own solar production and using it later is worth more than exporting at a reduced rate.
How to Read Your Net Metering Bill
A net metering bill looks different from a standard electric bill. Key elements to understand:
- Energy consumed from grid: Total kWh you drew from the grid during the billing period.
- Energy exported to grid: Total kWh your solar system sent to the grid.
- Net consumption: Grid consumption minus exports — this is what you are billed for. If negative, you have a credit.
- Energy charge: Your net consumption multiplied by your retail electricity rate.
- Fixed charges: Most utilities charge a fixed monthly fee — typically $5 to $20 — regardless of net consumption. Even solar customers with net zero energy bills pay this.
- Credit carryover: If your exports exceeded consumption, the credit balance carries to the next bill.
Time-of-Use Rates and Net Metering
Many utilities now offer or require time-of-use (TOU) pricing, where electricity costs vary by time of day — higher during peak demand hours (typically 4–9 PM weekdays) and lower during off-peak hours. TOU pricing complicates net metering calculations because the value of your solar export depends on when it occurs.
Solar panels typically produce peak power in the middle of the day — often before the highest-cost evening peak period. This mismatch means solar-only homes may export cheap midday power and import expensive evening power, reducing the financial benefit compared to a flat-rate utility. Battery storage that charges during cheap midday solar production and discharges during expensive evening peak hours addresses this mismatch and can significantly improve the economics.
Will Net Metering Continue to Exist?
Net metering is under ongoing pressure from utilities and state regulators who argue that solar customers do not pay their fair share of grid maintenance costs. Several states have reduced export rates in recent years — California\’s NEM 3.0 is the most significant example. The trend toward lower export rates is likely to continue as solar adoption grows.
Homeowners going solar today generally lock in current net metering rates for a defined period — typically 10 to 20 years depending on the state. Going solar now, before further rate reductions, is a legitimate financial consideration in states currently evaluating net metering policy.
Bottom Line
Net metering is the billing mechanism that makes residential solar financially viable for most homeowners — it allows you to effectively use the grid as a free storage device, banking excess daytime production for use at night. The value of net metering depends on your state\’s policy and whether your utility offers full retail or reduced export rates. Before committing to solar, confirm your utility\’s current net metering policy, the export credit rate, and whether the policy is grandfathered for new solar customers for a defined period.
