Nobody warns you about this part. You go through the whole process, get the solar panels installed, watch your production numbers climb on the SolarEdge app, and then your first utility bill arrives. You realize you’re getting paid way less per kilowatt-hour than you expected. Sometimes embarrassingly less.

I’ve talked to dozens of homeowners who discovered their net metering credit was $0.04/kWh when they were paying $0.14/kWh to buy electricity. That’s not a rounding error. That’s a structural feature of how utilities treat solar exports, and it catches people off guard more than almost anything else in the residential solar calculus.

So let’s actually get into how buyback rates work, why they vary so wildly, and how to figure out what yours will be before you sign a contract.

What a Buyback Rate Actually Is

Compensation MechanismExport RateTypical RangeHomeowner Favorability
Net Energy Metering (NEM)Retail rate$0.13-$0.30/kWhMost favorable
Net BillingAvoided cost$0.05-$0.13/kWhModerate
Avoided Cost / WholesaleWholesale only$0.02-$0.04/kWhLeast favorable
Feed-in Tariffs (FiTs)Fixed or above retailVariableRare in U.S., potentially favorable

When your solar system produces more electricity than your home is using at that moment, the excess flows back onto the grid. Your utility clocks it. The question is: at what rate do they credit you for it?

The answer depends on which compensation mechanism your utility uses, and there are a few meaningfully different ones.

Net Energy Metering (NEM) is the traditional model. Under classic NEM, your meter runs backward when you export power, and you’re credited at the same retail rate you’d pay to buy electricity. If you’re paying $0.13/kWh, you get $0.13/kWh back. This is the most favorable model for homeowners and it’s still widely available, but it’s under serious pressure in a lot of states.

California’s NEM 3.0, which took effect in April 2023 for new applicants, was a wake-up call for the whole industry. Export rates dropped by around 75% in some cases, averaging roughly $0.05/kWh depending on the time of export, compared to retail rates that can hit $0.30/kWh or higher on the state’s tiered structure. That changed the financial math for California solar dramatically, and it’s pushing new installations toward battery storage in a way that wasn’t happening before.

Net Billing is basically what California moved to. You sell at one rate (usually tied to the “avoided cost” your utility calculates), and you buy at a higher retail rate. The gap between those two numbers is where your return on investment quietly shrinks.

Avoided Cost / Wholesale Rate programs are the least favorable. Some utilities credit you only at the wholesale rate they’d pay any bulk generator. In some markets that’s $0.02 to $0.04/kWh. If you’re grid-tied and don’t have a battery, you’re essentially donating a significant chunk of your solar production to the utility.

Feed-in Tariffs (FiTs) are less common in the U.S. now than they were ten years ago, but a few co-ops and municipal utilities still run them. Sometimes these are actually above retail rate, which is unusual and worth investigating if you’re in a rural area served by a cooperative.

Why Your State and Utility Choice Matter More Than Your Panel Brand

Recommended Emporia Vue Gen 2 Home Energy Monitor 16 Sensors

Monitor 16 circuits in real time with solar and net metering support to optimize your solar ROI.

Check Price →

I’ll be honest: I spent the early part of my career focused heavily on system efficiency, panel specs, inverter quality. And that stuff matters. But the single biggest variable in your actual financial return isn’t a Panasonic HIT panel versus a Qcells Q.PEAK. It’s whether you’re in Arizona Public Service territory or SRP territory.

Those two utilities serve overlapping Phoenix metro geography and their export compensation programs are genuinely that different. SRP’s Customer Generation tariff historically resulted in much lower effective export credits than APS’s standard NEM offering. Same rooftop, same system, same city, totally different financial outcome.

NREL has done solid work on this. Their research shows that state-by-state effective export compensation rates vary from retail-rate NEM down to avoided-cost payments that are sometimes below $0.03/kWh. The gap is enormous. A 7kW system in Massachusetts under a favorable net metering rate structure might offset $1,800/year in electricity costs. A similar system in a state with degraded export rates might net $900/year. Same hardware, same sun hours, half the financial return.

EnergySage’s market data consistently shows that homeowners in states with full retail NEM see payback periods in the 7-10 year range, while those in states with weakened or pending NEM reforms are looking at 10-15 years. Batteries change this equation, but they also add $10,000-$15,000 to the system cost.

What surprised me when I started digging into utility tariffs specifically was how much variation exists within the same utility, depending on your rate class. Some utilities have time-of-use (TOU) rates that can actually benefit solar customers who export in the afternoon peak. Others apply demand charges to residential customers, which solar alone generally can’t address effectively. You need to read the actual tariff schedule, not the utility’s marketing page.

How to Actually Find Your Buyback Rate Before You Sign Anything

Most solar sales reps will show you a production estimate and a savings estimate, often in a slick proposal from Aurora Solar or Energy Toolbase software. That estimate is only as good as the export rate assumption baked into it. I’ve seen proposals that used retail rate assumptions for utilities that had already switched to avoided-cost compensation.

Here’s how to check it yourself:

Go to your utility’s website and find the tariff schedule for residential interconnected generation. It’ll usually be in a section called “Regulatory” or “Electric Rates” or something similarly bureaucratic. The document you want is sometimes called an “Interconnection Rate Schedule” or a “Net Metering Tariff.” It’s often a PDF that looks like it was designed in 2003.

Look for: the export compensation rate (could be listed as “energy credit,” “avoided cost rate,” or a reference to retail rate), any cap on net metering (some programs are capped at a percentage of peak utility demand), standby charges, monthly fixed fees that solar doesn’t offset, and what happens to unused credits at year-end (some roll over indefinitely, some expire, some are paid out at wholesale).

Can’t find it? Call the utility’s interconnection department, not customer service. Customer service often gives wrong answers on this. Ask specifically: “What is the current export compensation rate for new NEM or net billing applicants, and is it changing in the next 12 months?”

That last part matters. Several states have pending rate cases that could change the export rate between when you sign your solar contract and when you get permission to operate.

Batteries, Self-Consumption, and the New Math

Here’s the thing about degraded export rates: they make batteries more financially logical than they used to be.

If you’re only getting $0.04/kWh for power you export, but you’d pay $0.14/kWh to buy that same power back at night, a battery that captures that export and feeds it back to your home has an effective return of $0.10/kWh on every kWh it cycles. That math is far more compelling than it was under full retail NEM.

This is exactly the dynamic California’s NEM 3.0 was designed to create. It’s working. Battery attachment rates in California jumped significantly after the new rate structure took effect. Whether that’s good policy or a utility overreach is a genuinely contested question, but the practical effect for homeowners is clear: in low-export-rate environments, size your system for self-consumption, not maximum production.

What does that mean in practice? A home energy monitor like the Emporia Vue 2 is genuinely useful here. Running it for 30-60 days before you design a solar system gives you granular load data by circuit, so you can match system production to actual consumption patterns instead of just sizing for maximum kWh.

As an Amazon Associate this site earns from qualifying purchases.

Solar-plus-storage is increasingly the answer in degraded-NEM states, but it’s not for every budget. And I’ll note: even in states with strong NEM today, there’s no guarantee it stays that way. If you’re planning a 25-year system and betting on retail-rate exports for the whole period, you’re making a significant policy assumption.

What Red Flags Look Like in a Solar Proposal

I’ve reviewed a lot of contractor proposals at this point, and the ones that skip over export rate assumptions, or bury them in vague language, are the ones to scrutinize hardest.

Any proposal that shows you “100% bill offset” without specifying the net metering mechanism is glossing over something important. In many cases that’s not possible without storage or dramatic load-shifting behavior, especially if your utility applies monthly fixed fees that solar can’t touch.

Watch for proposals that assume retail-rate exports without documenting that your specific utility and rate class actually supports that. And if a contractor tells you “net metering is guaranteed,” push back. It’s a policy, not a law carved in stone. Hawaii, Nevada, California, and Idaho have all significantly altered NEM compensation within the last decade.

Ask to see the tariff schedule the proposal is based on. If the contractor can’t produce it, that’s telling.

The buyback rate question doesn’t have a universal answer, and anyone who tells you it’s simple is probably selling something. What I’d leave you with is this: before the panels go on your roof, read your utility’s actual tariff document. It’s dry, it’s bureaucratic, and it might be the most financially important hour of research you do on this whole project.

Sources

Disclosure: As an Amazon Associate, we earn a small commission from qualifying purchases at no extra cost to you. We only recommend products that genuinely support the topics covered in this article.

Disclosure: As an Amazon Associate, we earn a small commission from qualifying purchases at no extra cost to you. We only recommend products that genuinely support the topics covered in this article.