NEM 3.0 (Net Billing Tariff) for California Businesses

You've heard NEM 3.0 killed California solar, and now you're unsure. The headlines are scary, but the truth is more useful. Bad information here can cost you a good investment. NEM 3.0 didn't end commercial solar in California; it changed how you design it, and this guide shows exactly how to win under the new rules.

We've redesigned countless California projects for net billing. The old export game is gone, but strong returns remain. Let's break down what changed, who's affected, and how to protect your ROI.

What Is NEM 3.0 and What Changed?

NEM 3.0 is California's net billing tariff, the successor to older net metering. The big change is export value. Power you send to the grid now earns far less than it did under the old rules.

Under the old system, exporting surplus paid nearly retail rates. That made "build big and export" a winning play. NEM 3.0 slashed those export payments, so selling extra power no longer drives your savings.

The value now comes from using your own solar on site. That single shift reshapes how every California system should be designed.

Why Storage Now Leads the Design

Since exports pay little, the smart move is to store your power, not sell it. A battery saves your midday solar for the pricey evening hours. You use your own energy when grid rates peak.

This is why storage moved from optional to central. Under NEM 3.0, solar and a battery are designed as one system. Our guide to commercial solar and battery storage in California covers how to size it.

The SGIP rebate helps fund that storage, depending on your utility. See how in our guide to the SGIP battery storage incentive. Together, storage and incentives keep NEM 3.0 payback strong.

Who Is Exempt From NEM 3.0?

Here's the part many owners miss: not everyone is under NEM 3.0. The rules apply to the big investor-owned utilities, PG&E, SCE, and SDG&E. Municipal utilities set their own terms.

So businesses on LADWP or SMUD largely skip NEM 3.0. They keep more balanced net metering, which changes their whole strategy. See how it plays out in commercial solar in Los Angeles and commercial solar in Sacramento.

Your first question, then, is simple: who is your utility? The answer decides whether NEM 3.0 shapes your project at all.

How to Protect Your ROI Under NEM 3.0

A few moves keep your return strong. First, design for self-use by matching system size to your daytime load. An oversized array that exports heavily wastes money now.

Second, add storage sized to your peak and demand charges. A battery cuts both your evening costs and your demand fees. Our guide to commercial solar payback in California shows how this protects ROI.

Third, stack incentives. The 30% federal credit, depreciation, and SGIP all shrink your net cost. See the full list in our guide to California commercial solar incentives.

NEM 3.0 by Business Type

The impact varies by how you use power. A warehouse running cooling and forklifts all day uses most of its solar on site, so it feels NEM 3.0 less. See our guide to commercial solar for warehouses in California.

A farm with seasonal pumping needs careful design to handle idle months. Our guide to agricultural solar for California farms digs into that. An office with modest daytime load leans hardest on storage.

The lesson is consistent: your load shape decides your design. A generic system built for the old rules will underperform under net billing.

Frequently Asked Questions About NEM 3.0

How does NEM 3.0 change the way I should design a solar system?

It flips the goal from export to self-use. NEM 3.0 pays far less for power you send to the grid than the old rules did. So most California businesses now pair solar with a battery to use their own power at peak times. Design the two together, not separately.

I have an older NEM 2.0 system. Will expanding it bump me to NEM 3.0?

It might, and that surprises owners. Adding capacity to a grandfathered NEM 2.0 system can trigger a switch to the newer, less generous rules. The exact line depends on your utility and how much you add. Check before you expand, because you could lose valuable old terms.

Which utilities does NEM 3.0 actually apply to?

The big investor-owned ones: PG&E, SCE, and SDG&E. Municipal utilities like LADWP and SMUD set their own rules and are not bound by NEM 3.0. So your utility decides whether these tougher terms hit you at all. Always confirm which one serves you.

Are the export rates under NEM 3.0 fixed or do they change?

They change, often by hour and season. NEM 3.0 uses time-based export values that shift with grid conditions. Exports are worth more during high-demand evening hours. That variability is exactly why storage and smart timing matter so much now.

Does NEM 3.0 make solar not worth it in California?

No, but it changes the design. Solar still pays off well, especially with storage and high rates. What died is the old "export everything" model. A system built for self-use and peak savings still delivers strong returns.

How long does NEM 3.0 lock in my rates once I connect?

Systems that interconnect under NEM 3.0 generally lock in its terms for a set period. That gives you predictability, even as rates evolve. The exact lock-in length depends on the rules at connection. Confirm the current terms with your installer.

Can I still benefit without a battery under NEM 3.0?

Yes, if your load is heavily daytime. A business that uses most of its power while the sun shines exports little to begin with. Warehouses and daytime operations fit this well. But most buildings gain far more with storage added.

Does NEM 3.0 affect demand charges?

Not directly, but the two interact. Demand charges are separate fees on your peak use, and NEM 3.0 pushed storage that also cuts those peaks. So a battery does double duty. Designing for both is where the real savings compound.

What happens to my NEM 3.0 credits at the end of the year?

They reconcile on an annual cycle set by the utility. Net surplus is often paid at a low rate, so banking excess isn't very valuable. This is another reason to use power on site rather than export it. Ask your utility how true-up works.

Should I rush to install before the July 2026 credit deadline?

The credit deadline and NEM 3.0 are separate, but both favor acting now. The full 30% federal credit needs construction started by July 4, 2026. Combined with a smart NEM 3.0 design, moving early protects your best possible return.

Ready to Design for NEM 3.0?

NEM 3.0 for California businesses rewards self-use and storage, not exports. With smart design and stacked incentives, your solar still pays off strongly. The best time to build a NEM 3.0-ready system is before the July 2026 tax deadline.

A quick note: GoSolarBusiness.com is not a solar installer or tax advisor. NEM 3.0 terms, export values, and utility rules change often. Savings depend on your usage and design. Always confirm current details with a qualified professional.