What Is Net Metering? A Clear Guide for Homeowners & Businesses

Solar is on more than 4 million U.S. rooftops, and in most places those systems still rely on some form of net metering to fairly value the power they export to the grid. If you’ve ever typed “what is net metering” into a search bar, this guide walks you through the concept with plain-language definitions, worked bill examples, policy snapshots, and a simple savings calculator you can use in minutes.

What is net metering?

Net metering is a billing mechanism that lets customers with onsite generation (typically rooftop solar) receive credit for electricity they export to the grid, offsetting the power they buy. Under classic net metering, the utility nets your usage and exports over a defined billing period (monthly or annually) at the retail rate. Many regions now use variations where exports are credited at a set value below retail (often called net billing).

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Key terms you’ll see on a bill or application:

• kW (kilowatt): Your system’s size or power rating. A 7 kW array can produce up to 7,000 watts at a given moment under test conditions.
• kWh (kilowatt-hour): Energy over time. One kWh runs a 1,000-watt appliance for one hour. Utilities bill in kWh.
• Export credit rate: The value each exported kWh earns. Under classic net metering it equals the retail rate; under net billing it is lower and may vary hourly.
• Billing period/true-up: The interval over which imports and exports are netted. Some programs do monthly true-ups; others reconcile annually.
• Bi-directional meter: A utility meter that separately records inflows (imports) and outflows (exports).
• Non-bypassable charges: Portions of a bill that can’t be offset with credits (e.g., certain public purpose charges in California).

For a deeper dive into how credits appear on monthly statements, see our primer: Net Metering Explained: How Solar Owners Get Credit for Excess Power (/sustainability-policy/net-metering-explained-credit-for-excess-power).

How net metering works: meters, flows, and simple math

What happens minute-by-minute:

1. Sun hits your panels. Your inverter converts DC solar power to AC.
2. Your home or business consumes solar first (self-consumption).
3. Excess solar flows outward through the meter to the utility grid.
4. The bi-directional meter counts imports and exports separately.
5. On your bill, the utility applies credits for exports according to your tariff, then adds fixed charges and taxes.

Two common structures you might see on a tariff sheet:

• Classic net metering (retail netting): Imports and exports are netted over the month at your retail energy rate (e.g., $0.18/kWh). If you export more than you use, credits carry forward (and often reset annually).
• Net billing (export crediting): Imports are charged at retail; exports are credited at a fixed or time-varying rate that reflects the grid’s avoided cost (often $0.03–$0.12/kWh, depending on location and hour).

Sample bill walkthroughs

Assumptions for both examples: fixed customer charge $12/month; taxes ignored for clarity.

1. Classic net metering (monthly retail netting)

• You import 500 kWh and export 300 kWh in June.
• Retail rate: $0.18/kWh.
• Net energy = 500 – 300 = 200 kWh.
• Energy charge = 200 × $0.18 = $36.
• Total bill = $36 + $12 fixed = $48.
• If exports exceeded imports, the remaining 100 kWh would credit forward to July at $0.18/kWh in many programs (subject to annual true-up rules).

2. Net billing (export crediting)

• You import 500 kWh and export 300 kWh in June.
• Import rate (average across your time-of-use periods): $0.28/kWh.
• Export credit (average): $0.07/kWh (similar to recent California NEM 3.0 average export values modeled by the CPUC).
• Import charges = 500 × $0.28 = $140.
• Export credits = 300 × $0.07 = $21.
• Net energy charges = $140 – $21 = $119.
• Total bill = $119 + $12 fixed = $131.

Why the difference? Classic net metering applies the retail rate value both ways, while net billing compensates exports closer to the utility’s avoided cost. Under net billing, increasing self-consumption (using more of your solar onsite via load shifting or storage) improves economics.

What about time-of-use (TOU)?

If you’re on TOU rates, both import prices and export credits can vary by hour. Running the dishwasher at noon (when solar is high) can use your generation directly and avoid higher evening prices. Some programs also provide higher export credits during late afternoon peaks.

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By the numbers

• 40+ U.S. states plus D.C. offer net metering or a successor export-crediting policy, according to Interstate Renewable Energy Council (IREC) state tallies.
• California’s NEM 3.0 (effective 2023) shifted new customers to net billing with typical average export values modeled around $0.05–$0.08/kWh; average residential retail rates often exceed $0.25/kWh (CPUC, utility tariffs).
• Average U.S. residential electricity prices were roughly $0.15–$0.17/kWh in 2024, with wide regional variation (U.S. Energy Information Administration).
• A typical 7 kW rooftop system can produce ~8,400–12,000 kWh/year depending on location and tilt (NREL PVWatts).
• Each kWh of rooftop solar typically avoids ~0.35–0.45 kg CO2 on today’s U.S. grid (EPA eGRID regional factors), roughly 3–5 metric tons/year for a 7 kW system.

Who is eligible and how to enroll

Eligibility varies by state and utility, but common patterns include:

• Customer class: Residential, small commercial, municipal, schools, nonprofits, and farms are commonly eligible.
• System size caps: Ranges from 10 kW residential limits in some territories to 1–5 MW commercial caps. Many states cap size at 100–120% of historical onsite load.
• Program caps: Some states limit net-metered capacity as a percentage of utility peak demand (e.g., 5–10%).
• Metering: A bi-directional meter is required; some utilities add a production meter.
• Insurance/interconnection: Larger commercial systems may need liability insurance and more detailed protection studies.

Enrollment steps

1. Pre-application: Confirm eligibility, system size limit, and rate options with your utility or local installer.
2. Interconnection application: Submit site plan, single-line diagram, equipment spec sheets (UL 1741 SA/IEEE 1547 listed), and proposed system size. Fees are commonly $0–$500 for residential; higher for large C&I.
3. Utility review: Screening for safety (anti-islanding, voltage, fault current). Timelines commonly 2–8 weeks for residential; more for commercial.
4. Installation and inspections: Local building/electrical inspection plus any utility witness test.
5. Permission to operate (PTO): Utility approves energization and turns on bi-directional metering and your net metering or export-credit tariff.
6. Billing enrollment: Verify your bill shows separate import/export line items or a net line plus any credit bank.

Tip: Keep signed copies of your interconnection agreement and tariff; they govern crediting rules and any grandfathering.

Net metering vs alternatives: what to compare

• Net billing: Your exports earn a set value (fixed or hourly) below retail, often aligned with wholesale or avoided costs. Many states shifting from classic net metering adopt this.
• Feed-in tariffs (FITs): You’re paid a fixed rate for all generation, often via a separate meter. Common in the EU; less common for new U.S. projects today.
• Buyback plans in competitive markets: In places like Texas, retail electric providers offer their own export buyback rates, sometimes tied to wholesale prices.
• Time-of-use (TOU) self-consumption: Even without generous export credit, TOU rates reward using your solar during high-price periods.
• Batteries and load shifting: Storage can increase self-consumption and arbitrage TOU price spreads. See: Energy Storage Explained: Types, Costs, and How It Powers the Grid (/ai-technology/energy-storage-explained-types-costs-grid).

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When do batteries help? Under net billing with low export values and high evening prices, modest batteries (e.g., 10–15 kWh) can store midday solar for evening use, improving bill savings. They also provide backup during outages—something net metering alone cannot do because inverters must shut off for lineworker safety (anti-islanding).

Policy landscape and rates by region

United States highlights

• California: NEM 3.0 (2023) moved new customers to hourly export credits approximating avoided costs. Export values are typically ~$0.05–$0.08/kWh on an annual average, but vary widely by month and hour (CPUC). Self-consumption and TOU management are now central to paybacks.
• New Jersey: Retains retail net metering with annual true-up for most customers, plus a separate incentive for solar production (Successor Solar Incentive). Explore local economics: Solar in New Jersey: Costs, Incentives & Top Installers (2026) (/renewable-energy/solar-in-new-jersey-costs-incentives-top-installers-2026).
• New York: Uses Value of Distributed Energy Resources (VDER) “Value Stack” to credit exports based on location, time, capacity value, and environmental attributes. For local market context, see Solar in New York: Costs, Incentives & Top Installers (2026) (/renewable-energy/solar-in-new-york-costs-incentives-top-installers-2026).
• Florida: Retail net metering remains in place for investor-owned utilities after a 2022 veto of a rollback bill. Municipal/co-ops may vary.
• Massachusetts: Strong net metering (subject to caps) and alternative credits (SMART program) depending on size and segment.
• Arizona: Transitioned to export credit rates below retail (ACC decisions); credits are periodically adjusted.
• Hawaii: Ended classic net metering; offers programs like Smart Export with time-specific export windows and strong focus on self-consumption.
• Texas: No statewide mandate; retail electric providers offer voluntary buyback plans in deregulated territories; municipal/co-op rules vary.

Europe snapshot

• Germany: Predominantly feed-in tariffs/premiums for exports with separate compensation; small PV systems receive a fixed eurocent/kWh payment for surplus and benefit from VAT exemptions on small systems.
• Spain: Since 2019, “compensación simplificada” credits surplus generation on the bill, typically at near-wholesale values; annual cash-outs are limited.
• United Kingdom: Smart Export Guarantee (SEG) pays per-kWh export rates set by suppliers; rates vary widely.
• Netherlands: One of the most generous netting regimes; phase-out proposals were debated, and as of 2024 the scheme remained in place after a Senate vote to reject the phase-out bill.

Where to check your policy

• Utility tariff sheets (rate schedules for distributed generation or “Riders”).
• State public utility commission (PUC) dockets for interconnection and net metering rules.
• IREC and NCSL policy trackers, and the DSIRE database for programs and incentives.

Financial impact and real examples

Key drivers of savings

• Your retail rate and TOU spread: Higher evening prices increase value of self-consumption.
• Export credit value: Classic net metering (retail) maximizes credit; net billing reduces it.
• Solar production: Location, tilt, shading. A rule of thumb is 1 kW produces 1,200–1,800 kWh/year (NREL PVWatts).
• System cost and incentives: Federal tax credit (30% ITC) plus any state/utility incentives and performance payments.
• Fixed/minimum charges and non-bypassable charges: These can floor your bill regardless of credits.

Illustrative scenarios

1. Retail net metering territory

• 7 kW system, produces 10,000 kWh/year.
• Household uses 9,000 kWh/year.
• Retail rate: $0.16/kWh. Fixed charges: $15/month.
• Net annual energy charge ~0 kWh (credits cover usage across the year) but you still pay fixed: 12 × $15 = $180/year.
• Gross energy offset value: 9,000 × $0.16 = $1,440/year.
• If installed cost is $20,000 before 30% ITC, net cost $14,000. Simple payback ~9.7 years ($14,000 / $1,440), excluding modest O&M.

2. Net billing territory with low export value

• Same 7 kW, 10,000 kWh/year production; 40% self-consumed, 60% exported.
• Imports avoided by self-consumption: 4,000 kWh at $0.30/kWh (TOU avg) = $1,200/year avoided.
• Exports credited: 6,000 kWh × $0.07/kWh = $420/year.
• Annual fixed/minimum charges: $200.
• Net annual benefit ≈ $1,200 + $420 − $200 = $1,420/year.
• If net system cost is $14,000 after ITC, simple payback ~9.9 years. Boosting self-consumption to 60% could raise annual benefit to ~$1,700 and cut payback by more than a year.

A simple savings calculator you can use Inputs:

• System size (kW)
• Production factor (kWh/kW-year) — use 1,200–1,800
• Self-consumption (%) — 30–80% typical depending on load profile and storage
• Retail import rate ($/kWh) — find your utility’s rate, TOU if applicable
• Export credit rate ($/kWh)
• Fixed/minimum charges ($/year)
• Installed cost and incentives

Formulas:

• Annual production = kW × production factor
• Self-consumed kWh = production × self-consumption%
• Exported kWh = production − self-consumed
• Avoided import cost = self-consumed × retail rate
• Export credit value = exported × export credit rate
• Annual fixed cost = fixed/minimum charges
• Net annual benefit = avoided import + export credit − fixed cost
• Simple payback (years) = net cost after incentives ÷ net annual benefit

Want a state-specific cost baseline and incentives context? Start with: Solar in New Jersey: Costs, Incentives & Top Installers (2026) (/renewable-energy/solar-in-new-jersey-costs-incentives-top-installers-2026) or Solar in New York: Costs, Incentives & Top Installers (2026) (/renewable-energy/solar-in-new-york-costs-incentives-top-installers-2026).

Common pitfalls, FAQs, and next steps

Common pitfalls

• Credit expiration at true-up: Many programs reset annual credits; plan usage to avoid losing banked kWh.
• Minimum and non-bypassable charges: Expect a monthly floor you can’t offset with credits.
• Demand charges (commercial): Savings depend on reducing peak kW as well as kWh. Solar alone may not cut peak without batteries or load control.
• Program or cap changes: Terms can change for new applicants. Verify grandfathering timelines in your interconnection agreement.
• Oversizing systems: Many programs limit system size to past or expected load. Oversized systems can strand value if export credits are low or expire.
• Outages: Net-metered systems shut off during grid outages (anti-islanding). Add storage and an islanding-capable inverter for backup.

FAQs

• Does net metering work during an outage? No. For backup, pair solar with a battery and an islanding inverter.
• Are net metering credits taxable? Bill credits typically are not. If you receive cash payments, consult a tax advisor.
• Can renters participate? Options include community solar and virtual net metering where available.
• Can I bank credits seasonally? Many programs allow monthly carryover to an annual true-up. Check your tariff for seasonal and annual rules.
• What happens if I move? Credits usually stay with the account, not the person. The interconnection agreement can often transfer to a buyer.

Next steps

1. Check your utility’s distributed generation tariff and interconnection handbook.
2. Pull 12 months of usage to size your system within program limits.
3. Model self-consumption with your load profile. Consider TOU appliances, EV charging timing, and storage.
4. Get interconnection timelines in writing. Ask about fees, meter upgrades, and any production meter requirements.
5. Keep records of your enrollment date and tariff to document grandfathering.

Where the policy is heading Regulators across the U.S. and EU are converging on export compensation that better reflects grid value by time and location while preserving strong signals for self-consumption and flexible demand. Expect more time-varying export credits, wider use of TOU rates, and incentives for batteries and smart controls. For consumers and businesses, that means net metering remains valuable—but the best returns will come from right-sizing systems, shifting loads, and using storage where export values are low.