Net Metering by State: Where Residential Solar Pays Back Fastest in 2026

Net metering is the single biggest economic factor in residential solar — bigger than panel brand, bigger than installer markup, bigger than financing terms. Two homeowners with identical 7 kW systems in identical homes can have payback periods 4 years apart purely because of how their state credits exported energy.

Here's the lay of the land in 2026, organized by what each state's policy actually pays out.

Full retail net metering (best payback)

These states credit every exported kWh at the full retail rate — meaning 1 kWh sent to the grid offsets 1 kWh you pull at night, at the same price. Payback periods typically 6–9 years.

• Massachusetts — Class I/II NEM, full retail through 2026 (cap-watching)
• New Jersey — full retail under the Successor Solar Incentive (SUSI) program
• Connecticut — Net Billing Tariff with strong residential rates
• Rhode Island — full retail NEM with virtual net metering allowed
• Vermont — full retail with adder for residential
• Maryland — full retail credits roll over indefinitely
• Delaware — full retail, no monthly cap
• D.C. — full retail plus monthly REC payments
• Illinois — full retail under the Illinois Shines program
• New York — full retail under NY-Sun (transitioning to Value of DER)

If you're in any of these states, residential solar is almost always a good economic bet assuming a reasonably sunny roof and a decent installer. Sun-poor states like Massachusetts make up for less production with higher retail electricity rates.

Net billing / avoided cost (middle ground)

These states credit exports at a rate lower than retail — typically the utility's wholesale avoided cost, or a time-of-use schedule that pays you less in midday (when production peaks) than you pay at night. Payback periods 9–12 years.

• California — NEM 3.0 (now technically Net Billing Tariff). Exports valued at ~25% of retail. Battery storage is almost mandatory to keep economics workable.
• Arizona — APS and TEP both on avoided-cost or instantaneous-net billing
• Hawaii — interconnection-dependent; "Customer Grid Supply Plus" pays a fixed export rate well below retail
• Nevada — restored to ~95% retail under the Energy Choice Act, but with system-size caps
• Indiana — net billing at avoided cost; payback notably worse than under prior full-retail rules

California's NEM 3.0 transition has reshaped the residential solar industry — the same install that paid back in 5 years under NEM 2.0 now needs 9–11 years without battery, and 7–9 years with one. Battery attach rates on new CA installs are above 70% in 2026.

No net metering or hostile regulation (worst payback)

These states either don't require utilities to compensate exported solar at all, or set the export rate so low that solar economics depend entirely on offsetting your own consumption rather than getting paid back for exports.

• Oklahoma — buyback program optional, rates set by utility
• Mississippi — net billing at avoided cost only
• South Dakota — utility discretion, no statewide rule
• Tennessee — TVA's Generation Partners Program pays well below retail
• Idaho — net metering being phased out by Idaho Power

In these states, sizing solar to your own self-consumption (rather than to your annual usage) is the rational move — overproduction is essentially given to the utility at minimal compensation.

What this means when you compare quotes

When an installer presents a payback estimate, ask exactly which net metering tariff their math assumes. A few specifics:

1. Time-of-use vs. flat rate exports — many CA quotes still use NEM 2.0-era assumptions; insist on NEM 3.0 calculations
2. Annual reconciliation method — does your state roll excess credits forward forever, expire them annually, or cash them out at avoided cost?
3. Demand charges — residential customers in some utility territories (LADWP, some IOUs) face demand charges that solar without battery can't address
4. Minimum bill provisions — most utilities require a $5–$20/month minimum even if you're 100% offset

The installer's job is to model your specific tariff. If their quote skips this step, get a different quote.

A note on policy stability

State net metering rules change. California's NEM 2.0 → NEM 3.0 transition was probably the biggest shift in residential solar history, and there's no reason to expect Massachusetts, New Jersey, or New York's currently-generous policies will stay generous forever. If you're in a state with strong NEM and you've been considering solar, the marginal value of installing before the next rule change is real.

Browse licensed installers by state to compare quotes that account for your local tariff.