Something that almost no one told me when I got into residential solar consulting: the rate your utility pays you for excess power matters as much as the panels themselves. I’ll be honest, I assumed net metering was a settled thing. A law. A right. After spending most of my career doing electrical work and then making the shift into solar, I figured the policy framework was stable enough to plan around. I was wrong about that, and it’s cost some of my clients real money.

Net metering changes are quietly dismantling the ROI math that sold millions of Americans on solar over the past decade. And the solar industry, for understandable business reasons, isn’t exactly leading with that in their pitch meetings.

What Net Metering Actually Promised (and What’s Changing)

The original deal was clean: send excess power to the grid, get credited at the retail electricity rate. If you pay $0.14 per kilowatt-hour to buy power, you’d get $0.14 per kWh back as a credit when your panels overproduced. Simple, predictable, and the basis of almost every payback calculation you’ve ever seen on a solar quote.

California broke from that model with NEM 3.0, which took effect in April 2023. Under NEM 3.0, export rates dropped by roughly 75% on average, from around $0.30/kWh (California rates are high) down to as low as $0.05/kWh during many daytime hours. The state now uses a “avoided cost” rate instead of retail, which sounds reasonable until you realize that’s what utilities claim it costs them to generate power, not what they sell it to you for. That gap is enormous and entirely in the utility’s favor.

What surprised me was how quickly other states started watching California and treating it as a template rather than a cautionary tale. Nevada restructured its net metering program. Arizona has been fighting over it for years. Michigan, Louisiana, and several other states have proceedings underway or recently concluded that move in the same direction. The National Conference of State Legislatures has been tracking these proceedings, and as of July 2026, there are active net metering restructuring debates in at least 14 states.

The Real Numbers Behind the Shift

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ScenarioLocationSystem SizeAnnual ExportOld RateOld Annual CreditNew RateNew Annual CreditAnnual Loss25-Year Impact
Scenario 1Sacramento, CA8 kW2,700 kWh$0.28/kWh$756$0.05/kWh$135$621$15,525
Scenario 2Phoenix, AZUnknownUnknownRetail rate9-year paybackDemand charges14-year payback (no battery)Extended timeline+5 years
Scenario 3North CarolinaUnknownUnknownRetail rate (quote)BetterLower export rate (actual)Reduced$4,200 over 10 years$4,200

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Let me work through what this actually means for a homeowner.

Scenario 1: A homeowner in Sacramento installed 8 kW of panels in early 2022, under NEM 2.0. Annual production roughly 11,200 kWh. Household uses about 8,500 kWh, exports around 2,700 kWh. At the old retail export rate of ~$0.28/kWh, those exports were worth about $756 per year. Under NEM 3.0 rates, that same export earns maybe $135. That’s a $620/year swing. On a 25-year system, that’s over $15,000 in expected return just gone.

Scenario 2: I worked with a couple in Phoenix who were comparing quotes in late 2025. Their utility, APS, had already moved to a demand-charge-based rate structure that penalizes solar households who don’t have storage. Without a battery, their calculated payback period stretched from 9 years to over 14. With a Tesla Powerwall added (call it $12,000 installed), the payback dropped back to about 11 years. Annoying math. They bought the battery.

Scenario 3: A reader in North Carolina emailed me this spring asking why her solar company’s quote looked rosier than what her neighbor (who went solar two years prior) was actually experiencing. When I looked at the quote, the installer was using the current retail rate for both consumption offset and export credit. North Carolina’s Duke Energy has a separate, lower export rate for new customers. The difference in projected 10-year savings was about $4,200. Not nothing.

The Battery Question Just Got More Complicated

Batteries are now the go-to solution that installers pitch when customers raise net metering concerns, and I’m not saying they’re wrong to pitch it. Self-consumption is genuinely the better hedge against deteriorating export rates. Use your own power, skip the export entirely, stop letting the utility arbitrage against you.

But I’d be doing you a disservice if I didn’t say this clearly: the payback math on batteries is still rough. EnergySage’s market data shows the average battery installation in 2025 ran between $10,000 and $14,000 before incentives, with the federal tax credit (currently 30% under the Inflation Reduction Act’s residential clean energy credit) bringing that down meaningfully. But that credit has its own sunset questions; the political environment around IRA provisions has shifted enough that I wouldn’t assume the 30% figure holds past 2026 without verifying it.

What changed my thinking on batteries wasn’t the economics, it was the rate design. When utilities start moving toward time-of-use rates with high peak pricing in the evenings (which is happening in California, Nevada, and increasingly elsewhere), a battery stops being a backup power appliance and starts being a genuine arbitrage tool. Charge cheap, discharge expensive. That’s a different value proposition than just “store your solar for tonight.”

If you want to track your home’s energy flows before committing to a battery, a home energy monitor like the Emporia Vue or Sense Home Energy Monitor (affiliate link, site may earn a commission) will show you exactly how much you’re currently exporting versus using. I’ve recommended this to probably a dozen clients now as the first step before pulling the trigger on any storage decision.

What to Actually Do Before You Sign Anything

The thing that irritates me about most solar advice on this topic is how abstract it stays. So here’s what I’d actually walk through before signing a contract today:

First, look up your state’s current net metering rules specifically. The U.S. Department of Energy maintains a homeowner’s guide to going solar that includes policy basics, but for state-specific current rules you want the DSIRE database (dsireusa.org), which tracks incentives and regulations by state with actual last-updated dates.

Second, ask your installer two pointed questions: what export rate did you use in this production estimate, and what happens to my payback period if that rate drops 50%? If they fumble those questions or get defensive, that’s a red flag. A good installer will already have a sensitivity analysis ready.

Third, check whether your state is in an active net metering proceeding. If it is, consider whether grandfathering provisions apply to customers who sign before a certain date. Several states have explicitly grandfathered existing customers for 10 to 20 years, which is genuinely valuable. Others haven’t. California’s NEM 3.0 grandfathered NEM 2.0 customers for 20 years from their interconnection date, which is why some installers in California were sprinting to get customers connected before the deadline.

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