Getting Paid for the Sun: How Net Metering Rules Across the States Shape What Your Roof Earns

Why Your Zip Code Is Part of Your Solar Economics

Two identical homes — same roof, same panels, same sunlight — can earn wildly different amounts for the electricity they export to the grid. The variable is not technical. It is regulatory. Every state (and often every utility within a state) sets its own rules for compensating solar owners, and the spread between the most and least generous frameworks can swing a system's payback period by a decade.

Understanding these compensation models is not an academic exercise. It is the difference between sizing a system correctly and leaving money on the table for 25 years.

The Three Compensation Models Explained

Net metering is the gold standard for solar owners. When your panels produce more than your home consumes, excess kilowatt-hours flow to the grid and earn full retail-rate credit — the same price you pay to buy power. Your meter effectively spins backward. Under true net metering, the grid functions as free, perfectly efficient storage.

Net billing applies a different exchange rate. Exports are credited at a wholesale or avoided-cost rate — often 3 to 5 cents per kilowatt-hour — while imports still cost full retail, perhaps 15 to 25 cents. This spread, sometimes called the rate differential, penalizes exporting and rewards self-consumption: using your own solar power the moment it is produced, or storing it in a battery for evening use.

Feed-in tariffs, common in limited utility territories, contract to purchase your solar generation at a set price per kilowatt-hour, sometimes under long-term agreements. These programs are less widespread in the US but can offer predictable revenue when available.

A State-by-State Snapshot

Compensation rules shift frequently, so treat this as a directional map rather than a guarantee — and always confirm terms with your specific utility.

• California: The influential market moved from NEM 2.0 to NEM 3.0 in 2023, cutting export credits roughly 75% and shifting them toward an avoided-cost formula that varies by hour. Batteries became near-essential to preserve economics.
• Arizona, Nevada, Louisiana: Former net metering leaders that transitioned to net billing structures with significantly reduced export credit rates.
• New York, New Jersey, Massachusetts, Illinois: Retain strong net metering frameworks, often supplemented by state incentives and community solar programs.
• Texas: No statewide mandate; compensation depends entirely on the retail provider. Some offer generous solar buyback plans; others offer little.
• Florida, North Carolina, Colorado: Retain retail-rate net metering, though with varying system size caps and credit expiration rules.
• Alabama, Tennessee (portions): Among the least favorable environments, with some utilities offering only avoided-cost compensation.

The NEM 3.0 Lesson: Policy Is a Clock

California's transition offered the entire country a case study in policy risk. Homeowners who installed under NEM 2.0 locked in decades of retail-rate credits. Those who waited saw their projected export value drop by three-quarters overnight.

The lesson generalizes: solar compensation regimes tend to ratchet downward as adoption grows, because retail-rate net metering shifts grid costs to non-solar customers and becomes politically contested. Most states grandfather existing systems for 10 to 20 years under the rules in force at interconnection.

This creates a strategic asymmetry. In states with strong net metering still on the books, installing sooner captures a grandfathered rate structure that later adopters will not access. In states that have already moved to net billing, the design priority changes: batteries and load management matter more than raw panel count, because the financial reward flows from self-consumption rather than export.

How Policy Should Shape System Design

Under full net metering, oversizing a system can make sense — every exported kilowatt-hour earns full value. Under net billing, the optimal design tightens around your actual consumption profile. Oversize and you flood the grid at 3 cents; undersize and you buy back at 20 cents.

Practical implications for net billing markets:

• Pair storage with solar from day one; retrofitting later costs more.
• Consider load shifting — running the dishwasher, EV charging, and pool pumps midday when your own panels are producing.
• Examine time-of-use export rates carefully; NEM 3.0-style structures pay far more for evening exports than midday ones, which favors west-facing arrays and batteries.

The Takeaway

Solar's financial return is a partnership between your roof and your regulator. Before signing any contract, ask your installer — or better, verify independently — which compensation structure your utility applies, when it might change, and how the proposed system design performs under those specific rules. A system engineered around your state's policy reality will outperform one engineered around a generic national pitch every time.