California Homeowners:
A Home Battery Pays You Back
Under NEM 3.0, PG&E, SCE, and SDG&E customers export solar for up to 75% less than they used to earn. A Tesla Powerwall stores that energy and discharges it during evening peak hours — cutting your highest-cost imports to near zero. SMUD customers stack up to $10,800 in rebates. Everyone else gets 30% off at signing with the prepaid lease.
Quick answers
How much does a Tesla Powerwall cost installed in California in 2026?
A Tesla Powerwall 3 installed in California typically runs $12,000 to $16,000 with the prepaid lease — that's already 30 percent off at signing, no tax liability required. SMUD customers in Sacramento can subtract up to $5,400 per unit in additional rebates on top of that. Use our Powerwall savings calculator to see your number.
Will my home stay powered during a PG&E PSPS outage if I have a battery?
Yes — a Tesla Powerwall with island-mode configuration keeps your home running during a PSPS event. Standard grid-tied solar panels automatically shut off during outages as a required safety measure. A battery disconnects from the grid and powers your home independently. Solar With Watts installs Powerwall systems for homeowners across PG&E, SCE, SDG&E, and SMUD territories statewide.
Is a home battery worth it in California under NEM 3.0 in 2026?
Yes. Under NEM 3.0 — the net metering rule that changed California solar in 2023 — export credits dropped roughly 75 to 80 percent compared to NEM 2.0. Without a battery, that midday solar goes to the grid for near-wholesale rates while you pay full peak-rate prices at night. A Powerwall stores it instead — most California homeowners cut their evening peak bill to near zero, turning solar that used to earn pennies into energy worth dollars every single day.
Which situation fits you?
Three Types of California Battery Buyers —
Which One Are You?
Pick your situation below. Each path has different incentives, financing options, and the right first step.
Existing solar owner
I Already Have Solar — I Just Want a Battery
You installed solar under NEM 2.0 or earlier and your evening bill is still high. A Powerwall added to your existing system fixes that — no new panels required.
- Battery-only lease from $0 down via LightReach
- Works with most existing inverters
- SMUD customers: up to $5,400 rebate per Powerwall
- No credit check required
Going solar for the first time
I Want Solar + Battery Together
Under NEM 3.0, solar without a battery leaves evening savings on the table. A combined solar and Powerwall system is the standard-of-care solution for California homeowners in 2026.
- 30% off at signing — prepaid lease, no tax liability needed
- Tesla Powerwall 3 included — whole-home backup
- PG&E, SCE, SDG&E, SMUD & Pioneer territories
- Free custom sizing — takes 60 seconds
Outage protection priority
I Just Want Backup Power — No Solar Yet
PSPS events and grid outages are your main concern. A Powerwall can be installed as a standalone backup system charged from the grid, with solar added later when you're ready.
- Standalone Powerwall — no panels required to start
- Island-mode keeps lights, fridge & essentials on
- PACE financing available — tied to property, not credit
- Solar-ready — expand anytime
Not sure which fits your situation? Send us your utility bill — we'll run the numbers and tell you exactly which path makes sense. Free, no credit pull, response within one business day.
Up to $10,800 in Rebates
on a Tesla Powerwall System
SMUD's My Energy Optimizer Partner+ program pays up to $5,400 per Powerwall — and homeowners can stack two units for a combined rebate of up to $10,800. This is separate from and in addition to the prepaid lease 30% discount. Solar With Watts is an enrolled SMUD rebate partner — we handle the paperwork at no extra charge.
Max household rebate
2 Powerwalls · SMUD household cap
Stack with prepaid lease
30% off at signing
+ $880/yr VPP payments
+ rebate confirmed at proposal
* SMUD rebate amounts are subject to program funding availability and confirmed at proposal — not before. Verify current amounts at smud.org. SMUD household cap is $10,000. Rebate available for Tesla Powerwall only. Solar With Watts is not affiliated with SMUD.
Why 2026 is the year to act
Why Does NEM 3.0 Make a Home Battery Essential in California?
NEM 3.0 — California's CPUC-mandated Solar Billing Plan — replaced NEM 2.0 for new customers in April 2023. Under NEM 3.0, the credit you earn for exporting solar to the grid dropped by roughly 75 to 80 percent compared to NEM 2.0. Solar-only systems installed today earn low wholesale export credits at midday while paying full retail rates in the evening. A home battery eliminates that gap — store midday solar, use it at 4 to 9 pm when rates are highest, and cut your PG&E, SCE, or SDG&E evening bill to near zero.
NEM 2.0 vs NEM 3.0 vs Solar + Battery — Evening Peak Hours
| Scenario | Midday export credit | Evening peak cost | Net result |
|---|---|---|---|
| NEM 2.0 solar only | ~$0.32/kWh | $0.32–0.40/kWh | Near break-even |
| NEM 3.0 solar only | ~$0.05–0.08/kWh | $0.32–0.40/kWh | Evening bill remains high |
| NEM 3.0 solar + battery | Stored, not exported | Near $0 | Evening peak eliminated |
Rates based on PG&E E-TOU-C schedule and CPUC NEM 3.0 export compensation data. SDG&E and SCE rates vary — see your utility rate schedule for exact figures. † Run your numbers with our Powerwall calculator.
Solar charges your Powerwall at midday
Instead of sending cheap surplus energy to the grid for a low NEM 3.0 export credit, your Powerwall stores it at full value — 13.5 kWh per unit.
Powerwall discharges at 4–9 pm peak
PG&E, SCE, and SDG&E peak rates hit their highest point in the evening. Your battery covers that window automatically — no manual switching required.
You draw from the grid only after the battery is depleted
Most California homes sized correctly with one or two Powerwalls cover the entire evening peak on stored solar — drawing near-zero from the grid at peak rates.
Overnight and backup reserve maintained automatically
Tesla's software manages the reserve automatically — keeping a configurable backup buffer for PSPS events while still optimizing daily self-consumption.
Solar without storage in 2026 leaves real money on the table. Under NEM 3.0, the value of self-consuming your own solar is now 4 to 6 times higher than exporting it. A correctly sized Powerwall captures that value every single day.
Our flagship battery system
Why We Recommend the Tesla Powerwall 3 for California Homes
The Powerwall 3 is a meaningful upgrade over the Powerwall 2 — and a fundamentally different product from SolarEdge and Enphase batteries. It includes a built-in solar inverter, delivers 11.5 kW of continuous output for whole-home backup, and runs on lithium iron phosphate chemistry rated for 15 to 20 years of real-world use. For California homeowners navigating NEM 3.0, PSPS outages, and TOU rate optimization simultaneously, it is the most capable single-unit solution available. Use our Powerwall calculator to size your system.
| Specification | Powerwall 3 |
|---|---|
| Usable capacity | 13.5 kWh per unit |
| On-grid continuous power | 11.5 kW |
| Backup continuous power | 11.5 kW |
| Peak power (10 sec) | 22 kW |
| Built-in solar inverter | Yes — up to 20 kW DC input |
| Battery chemistry | Lithium iron phosphate (LFP) |
| Warranty | 10 years, unlimited cycles |
| Stackable | Yes — up to 4 units |
| Operating temp | –20°C to 50°C (–4°F to 122°F) |
| Round-trip efficiency | 97% |
| Dimensions | 43.25" × 24" × 7.6" |
| Install location | Indoor or outdoor, floor or wall |
Why Solar With Watts installs Powerwall 3 as our standard system
The built-in inverter simplifies installation — one unit handles solar conversion, battery storage, and backup switching instead of three separate components. For NEM 3.0 customers, the 11.5 kW continuous output means the Powerwall can cover a whole home during peak hours without shedding loads. SolarEdge and Enphase offer strong alternatives for specific configurations — you'll find them in our full battery comparison below — but for most California homes, Powerwall 3 is the most capable and cost-effective single solution available in 2026.
How long does a Powerwall last during an outage?
Backup duration depends on your home's daily energy use and whether your solar panels are recharging the battery during the outage. The table below shows estimated duration per Powerwall without solar recharging — with solar, most systems extend indefinitely during daylight hours.
| Home size / load profile | Daily usage | 1 Powerwall (13.5 kWh) | 2 Powerwalls (27 kWh) | Best for |
|---|---|---|---|---|
| Critical loads only (fridge, lights, phone charging) | 5–8 kWh | 36–48 hrs | 72–96 hrs | Most PSPS events (12–48 hrs) |
| Moderate use (no EV, no electric heat) | 20–25 kWh | 13–16 hrs | 26–32 hrs | Overnight + next day buffer |
| Typical California home (avg 30 kWh/day) | 28–32 kWh | 10–12 hrs | 20–24 hrs | Full-day outage coverage |
| High use (EV charging, electric heat/AC) | 45–60 kWh | 5–7 hrs | 10–14 hrs | 3–4 Powerwalls recommended |
Duration estimates assume 100% depth of discharge and no solar recharging. Real-world duration with solar recharging is significantly longer. Tesla warrants the Powerwall 3 for 10 years with at least 70% capacity retention and unlimited charge cycles. † Use our Powerwall calculator to size your system based on your actual utility bill and usage.
How Many Powerwalls Do I Need?Compare your options
Tesla Powerwall 3 vs SolarEdge vs Enphase — Which Home Battery Is Right for You?
All three are solid whole-home battery systems installed by licensed California contractors. The right choice depends on your existing equipment, utility, and backup goals. Here's how they compare on the factors that matter most for California homeowners in 2026.
Whole-home battery systems Installed by Solar With Watts
| Feature | Tesla Powerwall 3 | SolarEdge Home Battery | Enphase IQ Battery 5P |
|---|---|---|---|
|
Recommended Powerwall 3 |
SolarEdge Home Battery |
Enphase IQ Battery 5P |
|
| Usable capacity | 13.5 kWh per unit | 9.7 kWh per unit (stackable) | 5 kWh per unit (stackable) |
| Continuous output | 11.5 kW — whole-home backup | 5 kW | 3.84 kW per unit |
| Built-in inverter | ✓ Yes — up to 20 kW DC | ✗ No — requires SolarEdge inverter | ✗ No — requires Enphase microinverters |
| Whole-home backup | ✓ Yes — single unit | ◑ Partial — depends on system size | ◑ Partial — stack required for whole-home |
| Battery chemistry | LFP (lithium iron phosphate) | LFP | LFP |
| Warranty | 10 yr / unlimited cycles / 70% retention | 10 yr / unlimited cycles | 15 yr / unlimited cycles |
| Round-trip efficiency | 97% | 94.5% | 96% |
| SMUD rebate eligible | ✓ Yes — up to $5,400/unit | ✗ Not currently | ✗ Not currently |
| NEM 3.0 TOU optimization | ✓ Automatic | ✓ Yes | ✓ Yes |
| Best fit | Most California homes — new solar or retrofit | Existing SolarEdge inverter systems | Existing Enphase microinverter systems |
| Installed cost range (CA) | $12,000–$16,000 with prepaid lease (30% already applied) | $10,000–$14,000 installed (cash/loan; no lease available) | $8,000–$12,000 (1–2 units) |
Installed cost estimates for California in 2026. Final pricing depends on system size, roof configuration, and applicable incentives. SMUD rebate of up to $5,400 per Powerwall available to Sacramento-area SMUD customers — verify current amounts at smud.org. SolarEdge and Enphase batteries are best suited to homes with existing matching inverter equipment. † Run your Powerwall numbers or request a free estimate for SolarEdge or Enphase sizing.
Portable & backup power stations No installation required
Not every situation calls for a whole-home battery installation. Portable power stations are a practical option for renters, cabins, RVs, job sites, or as a supplemental backup for specific appliances — medical equipment, garage freezers, home offices — during short outages. No electrician, no permit, no installation required.
EcoFlow DELTA Pro Ultra
Expandable home backup power station
The DELTA Pro Ultra bridges the gap between portable power stations and whole-home battery systems. Starting at 6 kWh and expanding to 90 kWh with add-on batteries, it can power an entire California home during a PSPS event when connected to an optional smart panel — no permanent installation required for basic use. For renters or homeowners not yet ready for a Powerwall, this is the most capable plug-in backup option available.
See EcoFlow DELTA Pro UltraBLUETTI AC300 + B300
Modular backup power station
The AC300 is a reliable modular option for powering critical loads during shorter outages — refrigerator, medical equipment, router, lights. Fully expandable with B300 battery modules and solar-rechargeable for multi-day events. A strong choice if budget is the primary constraint or whole-home backup isn't the goal.
See BLUETTI AC300Portable power station links are affiliate links — Solar With Watts may earn a commission at no cost to you. Portable stations are not a substitute for a permanently installed home battery system for whole-home NEM 3.0 savings or PSPS protection. See whole-home battery options above.
Not sure which battery fits your home?
Our Powerwall calculator sizes your system based on your actual utility bill, daily usage, and utility territory — and shows your savings with current incentives applied. Free, 60 seconds, no obligation.
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PSPS outage protection
Will Solar Panels Keep Running During a PG&E PSPS Event?
Standard grid-tied solar panels automatically shut off the moment the grid goes down — including during PG&E, SCE, and SDG&E Public Safety Power Shutoff events. This is a required safety measure to protect utility workers on downed lines. A battery changes everything.
Solar only — no battery
Grid-tied system without storageYour panels are generating power — but the inverter shuts off automatically when it detects grid loss. You have solar on your roof and no power in your home.
- Panels shut off immediately at grid loss
- No power regardless of sunlight
- No refrigerator, no lights, no medical devices
- Must wait for grid restoration — average PSPS: 24–48 hours
Solar + Powerwall — island mode
Battery-backed system with automatic switchoverThe Powerwall detects grid loss in milliseconds and switches to island mode automatically — your home never notices the outage. Solar keeps charging the battery during daylight.
- Seamless automatic switchover — under 20ms
- Solar continues charging battery all day
- Whole-home or critical load backup depending on system size
- Indefinite operation as long as sun is available
How island mode works
Grid goes down
Powerwall detects the grid loss in under 20 milliseconds — faster than a light flicker. Most homeowners never notice the transition.
Powerwall isolates your home
The battery disconnects from the grid and creates a self-contained microgrid for your home — complying with safety requirements while keeping you powered.
Solar recharges the battery all day
Your panels continue generating — and because you're now in island mode, that power goes directly into the Powerwall instead of being sent to the grid.
Grid restores — Powerwall reconnects automatically
When PG&E or SCE restores power, the Powerwall confirms grid stability and reconnects seamlessly. No action required on your part.
Financing & incentives
What Does a Home Battery Actually Cost After California Incentives?
A Tesla Powerwall 3 runs $12,000–$16,000 installed with the prepaid lease — that price already includes the 30 percent discount applied at signing. SMUD customers can subtract up to $5,400 per unit in additional rebates on top of that. Here is every financing path available in 2026.
The sticker price is not what you pay. A third-party company owns the system under the prepaid lease and claims the 30% federal commercial ITC under Section 48E — passing that discount directly to you at signing. No personal tax liability required. No waiting for a refund. 30% off is applied before you sign. The residential ITC for cash and loan buyers expired December 31, 2025 — the prepaid lease is now the primary federal savings pathway for California homeowners in 2026.
Best overall value
Prepaid Solar + Battery Lease
A third-party owner claims the 30% federal commercial ITC (Section 48E) and passes the full savings to you at the point of sale. You pay 30% less than the system's installed cost — upfront, in full, at signing. You own the system outright after 5 years. This is now the only federal incentive pathway available to California homeowners in 2026.
- 30% discount applied before you sign — no tax filing required
- Full system ownership after 5 years
- Available for solar-only, battery-only, and solar + battery
- Stacks with SMUD rebate for Sacramento customers
- Available statewide — PG&E, SCE, SDG&E, SMUD, Pioneer
Zero upfront
LightReach $0-Down Battery Lease
LightReach offers a battery-only lease and a solar plus battery PPA with no money down. Monthly payments are typically lower than your current utility bill. Best fit for homeowners who want immediate savings without a lump-sum payment — or existing solar owners adding storage.
- $0 down — no upfront cost
- Battery-only lease available for existing solar owners
- Solar + battery PPA available for new installs
- No credit score minimum for battery-only
- Rate locked — protects against utility rate increases
No credit check
PACE Financing
Property-Assessed Clean Energy financing is tied to your home — not your credit score. Approval is based on home equity and current property tax status. Repaid as a line item on your annual property tax bill. Available in 360 or more California cities.
- No credit score requirement
- Approval based on home equity — not income or FICO
- Repaid on property tax bill — not a monthly loan
- Available for solar, battery, roofing, HVAC, and windows
- Transfers with the home if you sell
Maximum ownership
Cash or Solar Loan
Cash purchase or a solar loan gives you full ownership from day one. Note: the residential 30% federal ITC (Section 25D) expired December 31, 2025 and is no longer available for cash or loan buyers in 2026. Cash still makes sense for homeowners who prefer full ownership and plan to hold long-term. GoodLeap and EnFin offer low-rate solar loans statewide.
- Full ownership from day one — no lease terms
- No federal ITC available for cash/loan in 2026 — residential 25D expired Dec 31, 2025
- Stacks with SMUD rebate — no restrictions
- Solar loan rates from approved California lenders
- Best long-term total cost of ownership
California battery incentives at a glance — 2026
| Incentive | Amount | Who qualifies | Stacks with lease? | Status |
|---|---|---|---|---|
| Prepaid lease 30% discount | 30% off installed cost | All California homeowners | N/A — is the discount | ✓ Active |
| Federal ITC — cash/loan (expired) | 30% of system cost | Homeowners with tax liability | ✗ Not with lease | ✗ Expired Dec 31, 2025 — residential 25D ended |
| SMUD My Energy Optimizer | Up to $5,400 per Powerwall | SMUD territory — Powerwall only | ✓ Yes | ✓ Active — verify at smud.org |
| SMUD VPP payments | $440/yr per Powerwall | SMUD territory enrolled batteries | ✓ Yes | ✓ Active |
| SGIP battery rebate | Varies by utility | PG&E · SCE · SDG&E | — | ✗ Currently closed — waitlist only |
| PACE financing | $0 down — repaid on property tax | Homeowners in 360+ CA cities | N/A — financing, not rebate | ✓ Active |
SGIP is currently closed to new applicants — the waitlist remains open but funding is not guaranteed. For most homeowners in 2026, the prepaid lease discount and SMUD rebate deliver stronger immediate savings than SGIP ever did for most participants. † Run your Powerwall numbers to see incentives applied to your actual utility bill. Rebate amounts confirmed at proposal — not before.
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We'll Run the Battery Numbers.
Send us your utility territory and monthly bill — we'll review your usage, confirm which incentives apply, and show you exactly what a battery system costs and saves for your specific home. No pressure, no obligation, no credit check required.
Frequently asked questions
California Home Battery Questions — Answered
Everything California homeowners ask before adding a home battery in 2026. Click any question to expand the answer.
How much does a Tesla Powerwall 3 cost installed in California in 2026?
A Tesla Powerwall 3 installed in California typically costs $12,000 to $16,000 with the prepaid lease — that price already reflects the 30 percent discount applied at signing, with no personal tax liability required. SMUD customers in Sacramento can subtract up to $5,400 per unit in additional rebates on top of that. Use our free Powerwall calculator to see your estimated cost with current incentives applied.
How many Powerwalls does a California home need?
Most California homes need one to two Powerwalls. One Powerwall at 13.5 kWh covers a typical evening peak window for a home using 20 to 25 kWh per day. Two Powerwalls provide whole-home backup through most PG&E PSPS events and full overnight coverage for higher-usage homes. Homes with electric vehicles, electric heat, or above-average usage may need three or more. Our sizing calculator gives you a recommendation based on your actual utility bill.
Is a home battery worth it in California under NEM 3.0?
Yes — a battery is more valuable under NEM 3.0 than under any previous California solar policy. Under NEM 3.0, export credits dropped roughly 75 to 80 percent compared to NEM 2.0. A battery stores your midday solar production and uses it during evening peak hours — when PG&E, SCE, and SDG&E rates are highest — instead of sending it to the grid for a low wholesale credit. Solar without storage in 2026 leaves real money on the table. A correctly sized battery captures that value every single day.
What is the SMUD Powerwall rebate and how do I get it?
SMUD's My Energy Optimizer Partner+ program pays up to $5,400 per Tesla Powerwall for Sacramento-area homeowners. You can stack two Powerwalls for a combined rebate of up to $10,800 — subject to the SMUD household cap. Solar With Watts is an enrolled SMUD rebate partner and handles all program paperwork at no extra charge. Rebate amounts depend on current program funding and are confirmed at proposal. See our full SMUD rebate guide or run the calculator to see your estimated savings.
Will my solar panels keep running during a PG&E PSPS outage?
No — standard grid-tied solar panels automatically shut off during a PSPS event. This is a required safety measure so utility workers are not endangered by live power on downed lines. With a Tesla Powerwall, the answer is yes. The Powerwall detects grid loss in under 20 milliseconds, switches to island mode, and keeps your home powered. Your solar panels continue charging the battery during daylight, giving you indefinite runtime as long as the sun is out. See our full PSPS and backup power guide.
Can I add a battery to my existing solar system without replacing it?
Yes — a battery can be added to most existing solar systems without replacing your panels or inverter. LightReach offers a battery-only lease from $0 down specifically for existing solar owners. The Tesla Powerwall 3 includes a built-in inverter and connects AC-coupled to your existing system in most configurations. Compatibility depends on your current inverter brand and age — SolarEdge and Enphase owners typically add a matching battery from their own ecosystem for the cleanest integration. See battery-only lease options or send us your system details for a free compatibility check.
Can I get a home battery with no credit check in California?
Yes — two options require no credit check. PACE financing is a property-assessed program tied to your home equity rather than your credit score, repaid as a line item on your annual property tax bill and available in over 360 California cities. LightReach's battery-only lease also has no credit score minimum for qualifying homeowners. Neither option requires a credit pull to get a quote from Solar With Watts. Request a free estimate and tell us your situation — we'll match you to the right path.
What is the difference between a Powerwall, SolarEdge battery, and Enphase battery?
The Powerwall 3 delivers 11.5 kW of continuous output with a built-in solar inverter — making it capable of whole-home backup from a single unit. SolarEdge and Enphase batteries are strong options but require their own matching inverters and typically need multiple units stacked to match the Powerwall's output. Powerwall 3 is our recommendation for most California homes — particularly those starting fresh or wanting whole-home PSPS protection. SolarEdge is best for homes already running a SolarEdge inverter. Enphase IQ Battery suits existing Enphase microinverter systems. Only the Powerwall currently qualifies for the SMUD rebate of up to $5,400 per unit.
Is the SGIP battery rebate still available in California?
No — SGIP is currently closed to new applicants. The California Self-Generation Incentive Program has paused new enrollment pending additional state funding. For most California homeowners in 2026, the prepaid lease 30 percent discount delivers equal or better immediate savings without a waitlist. SMUD customers in Sacramento have a separate active rebate program worth up to $5,400 per Powerwall that is independent of SGIP entirely. See our SGIP status page for the latest program updates.
How long does a Tesla Powerwall last and what is the warranty?
Tesla warrants the Powerwall 3 for 10 years with at least 70 percent capacity retention and unlimited charge cycles. In real-world use, lithium iron phosphate batteries like the Powerwall 3 typically last 15 to 20 years with proper installation. The unit operates in temperatures from negative 4 to 122 degrees Fahrenheit — well within California's climate range. The LFP chemistry is more thermally stable and longer-lived than older NMC lithium batteries used in some competing products. Use our Powerwall calculator to estimate long-term savings over the full system lifespan.
Still have a question about your specific home or utility? Send us your bill and utility — we'll review your situation and give you real numbers, not estimates. Free, no credit pull, response within one business day.
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Saves Your California Home
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