Does NEM 3.0 require a battery in 2026?

No, NEM 3.0 does not legally require you to install a battery — the CPUC's Net Billing Tariff simply changed how exported energy is valued, not whether you can participate without storage. In practice, though, the ~75% reduction in midday export credits means a solar-only system on SCE, PG&E, or SDG&E will export its peak generation hours at roughly 3–9¢/kWh while you pay back 34–35¢/kWh (SCE) when you draw from the grid in the evening — a gap that dramatically slows payback.

Last verified: July 2026 by Helios Energy Global.

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Why the "no battery" option still exists but rarely pencils out

Under the old NEM 2.0 rules, every kilowatt-hour you pushed back to the grid earned you a credit at roughly the full retail rate — around 25–35¢/kWh depending on your utility and time of day. The math was simple: overproduce during the day, bank credits, zero out your bill at the end of the year.

NEM 3.0 replaced that with avoided-cost pricing — essentially what the utility would pay a wholesale generator for the same energy at that hour. Midday solar (10 AM–3 PM) is the lowest-value window on the grid because there's already abundant solar supply. The CPUC's own avoided-cost calculator puts those midday export rates at roughly 3–5¢/kWh in summer, rising to 7–9¢/kWh during the late-afternoon transition hours. That's not zero — but it's nowhere near the 34–35¢/kWh you pay SCE when you pull power at 7 PM.

The result: a solar-only system under NEM 3.0 still offsets the power you use while the panels are producing, but it earns very little credit to offset your evening grid draw. A battery changes the equation by letting you store that midday generation and discharge it at 4–9 PM — exactly when SCE's TOU peak rate applies and the grid is most expensive.

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The numbers side by side

Scenario	Utility	Avg. export credit	Est. self-consumption	Est. simple payback	Battery needed?
Solar-only, NEM 3.0	SCE / SDG&E / PG&E	~3–9¢/kWh	~30–40%	~12–16 years (est.)	No (legal), but slow
Solar + battery, NEM 3.0	SCE / SDG&E / PG&E	~3–9¢/kWh export; savings from self-use at 34–35¢	~80–90%	~7–10 years (est.)	Recommended
Solar-only, LADWP net metering	LADWP	~22¢/kWh (retail)	~50–60%	~8–11 years (est.)	Optional
Solar + battery, LADWP	LADWP	~22¢/kWh export	~85–95%	~7–9 years (est.)	Adds resilience, not required for payback

All payback figures are estimates based on 2026 rate levels, a typical 8–10 kW residential system, and standard Southern California load profiles. Individual results vary. System cost assumed at approximately $2.40–$3.25/watt installed; battery at $10,000–$16,000 installed per unit.

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How NEM 3.0 export rates actually work hour by hour

The Net Billing Tariff isn't a flat rate — it fluctuates by hour, season, and year. A few things to understand:

• Midday (10 AM–2 PM): Lowest export value, often 3–5¢/kWh in summer. This is exactly when unshaded rooftop solar produces the most.
• Late afternoon (3–6 PM): Export value rises to roughly 7–20¢/kWh as grid demand climbs. A battery can capture midday generation and discharge here instead of exporting it.
• Evening (7 PM onward): You're drawing from the grid at full TOU rates (up to 34–35¢/kWh on SCE's peak plan). No solar production, no export — this is where battery discharge matters most.
• Seasonal variation: Winter export rates are generally lower than summer because heating loads are lower and solar production drops.

The practical takeaway: the hours your panels produce the most are the hours the grid values your export the least. A battery is the tool that bridges that timing mismatch.

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Municipal utility customers: a completely different situation

If you're served by LADWP, Pasadena Water and Power, Burbank Water and Power, Glendale Water and Power, Anaheim Public Utilities, or Riverside Public Utilities, stop — NEM 3.0 does not apply to you. These are municipal utilities regulated by their own city councils, not the CPUC.

LADWP, which serves most of the City of Los Angeles, still offers retail-rate net metering at roughly 22¢/kWh average. That's a fundamentally different value proposition. Under LADWP's program, a solar-only system can still earn meaningful bill credits for midday export, and payback timelines are competitive without a battery — though adding storage still makes sense for resilience and backup power during outages.

If you're not sure which utility serves your home, check your service area on our locations page or look at the top of your electricity bill.

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What a battery actually costs in 2026 — and what incentives remain

A single home battery (typically 10–13.5 kWh usable capacity) runs approximately $10,000–$16,000 installed in Southern California, depending on brand, capacity, and installation complexity. Two batteries, which some larger homes need to cover a full evening load, can run $20,000–$30,000 installed.

Important incentive note: The 30% federal residential solar tax credit expired December 31, 2025. There is no federal tax credit for a 2026 solar or battery installation. Do not let any sales pitch imply otherwise.

The Self-Generation Incentive Program (SGIP), California's main battery rebate, is waitlisted for residential applicants in 2026. Some utility-specific or local programs may exist — we track these and will flag anything applicable during your free consultation. Do not count on SGIP funds when budgeting.

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Designing a system that works under NEM 3.0

If you're on SCE and going solar in 2026, the design logic shifts compared to the NEM 2.0 era:

Right-size the solar array, don't over-size it. Under NEM 2.0, bigger was often better because you'd bank credits at retail rates. Under NEM 3.0, oversizing just means more low-value midday exports. A well-designed NEM 3.0 system targets roughly 100–110% of your annual consumption — enough to cover your load without generating massive excess.

Pair with a battery sized to your evening load. Most Southern California homes draw 15–25 kWh between 4 PM and midnight. A single 10–13.5 kWh battery covers a moderate evening load; larger homes or EV owners often need two.

Time your loads. Run the dishwasher, EV charger, and laundry during peak solar hours (10 AM–3 PM) to consume your own generation directly. This self-consumption is worth the full retail rate you'd otherwise pay — far more than any export credit.

Our solar vs. battery NEM 3.0 guide walks through the design math in more detail, and our NEM 3.0 explainer covers the tariff structure from the ground up.

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Frequently asked questions about NEM 3.0 and batteries

Can I add a battery later if I go solar-only now under NEM 3.0?

Yes, you can retrofit a battery to an existing solar system — but the economics of waiting are real. Every year without storage is a year of low export credits and high evening grid bills. Retrofits also typically cost more than installing solar and storage together, because labor and permitting are duplicated. If you're on the fence, it's worth modeling both scenarios with actual numbers before deciding. See our battery page for sizing guidance.

Does NEM 3.0 apply to me if I live in Santa Monica?

Santa Monica is served by SCE for most of its territory, so yes — NEM 3.0 applies. If you're in a small pocket served by LADWP, you'd be under LADWP's retail-rate net metering instead. Your bill's utility logo will tell you which one you have.

What if I already have solar under NEM 2.0 — do I have to switch to NEM 3.0?

No. Existing NEM 2.0 customers were grandfathered for 20 years from their interconnection date. You stay on NEM 2.0 terms unless you make a significant system change (like adding panels) that triggers re-interconnection. Adding a battery alone generally does not trigger a tariff change — confirm with your installer and utility before any modification.

Is the payback really 12–16 years without a battery on NEM 3.0?

That's a realistic range for a solar-only system on SCE at current rates and install costs, assuming standard self-consumption patterns. Homes with high daytime occupancy (remote workers, retirees, or those who shift loads to daytime) can do meaningfully better — perhaps 10–12 years — because they consume more solar directly. The 12–16 year estimate assumes a typical household that's away during peak production hours. Get a custom design to see your specific numbers.

Does SGIP cover the battery cost in 2026?

SGIP residential incentives are waitlisted in 2026, meaning new applicants cannot count on receiving funds. Waitlist positions and budget availability change — we monitor this and will let you know if your project qualifies for any available incentive at the time of your consultation. Do not build SGIP funds into your budget as a certainty.

Will NEM 3.0 export rates ever improve?

The CPUC reviews avoided-cost rates periodically. Some analysts expect late-afternoon export values to rise as EV adoption increases evening grid demand, which could modestly improve NEM 3.0 economics over time. However, no regulatory change to the fundamental structure is confirmed for 2026, and midday export rates are unlikely to return to retail-rate levels. Plan around today's rules.

How does roof type or orientation affect the NEM 3.0 battery decision?

A south-facing roof with no shade maximizes midday production — which, ironically, is the lowest-value export window under NEM 3.0. A west-facing array produces more in the late afternoon (3–6 PM), which aligns better with higher export rates and can improve solar-only economics slightly. Even so, a west-facing solar-only system still leaves you exposed to evening grid rates. Roof orientation is one of the factors we assess in every custom design. See also our roof types guide.

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Next steps

• Book a free consultation and custom design — we'll model your home with and without a battery under NEM 3.0 or LADWP net metering, whichever applies to your address.
• Explore our solar options — panel selection, system sizing, and what to expect from installation.
• See battery storage details and sizing — capacity options, brands we install, and how discharge timing works with SCE's TOU peak.
• Read our NEM 3.0 explainer — the full tariff structure in plain English.
• Solar vs. battery under NEM 3.0 — a deeper look at the design and payback math.
• Solar panel cost in Southern California — 2026 price ranges, what's included, and what drives cost differences.
• Check your location and service area — confirm whether you're on SCE, LADWP, or another Southern California utility.