What moves an installed Powerwall quote up or down.
Battery Storage
Store your solar. Beat the 4–9 PM peak.
OC Solar installs Tesla Powerwall 3 and Enphase IQ Battery 10C home batteries across Orange County and Southern California, alongside new or existing solar. A battery is what makes solar pencil under NEM 3.0 — and what keeps your home running when the grid goes down. We're a Tesla Powerwall Premier Certified installer and an Enphase-certified installer, so you can weigh Powerwall 3 against the Enphase IQ Battery 10C with honest, both-brands guidance.
When the grid goes down
The house that relights itself.
Grid down — PSPS outage
Powerwall 3 — on the garage wall
PSPS shutoff. The street goes dark.
A Public Safety Power Shutoff takes the neighborhood offline — no lights, no Wi-Fi, no fridge.
The battery takes over — automatically.
Powerwall 3 islands your home and runs it on the energy your roof banked by day.
Backup that fits your home.
Keep the whole house on, or protect just the essentials — you choose what stays lit.
We size every system honestly, so what you see here matches a real outage. Backup duration depends on your loads and how many Powerwalls you install — we'll model it for your home before you sign.
From sunrise to midnight
Your sunlight, saved for the night.
Your power costs the most from 4–9 PM — exactly when you're home.
Solar roof
Powerwall 3
Electrical panel
Patio heater
Living room
Kitchen
All day, the sun banks energy.
Your roof overproduces at midday — the Powerwall stores every spare kilowatt-hour.
The sun sets. Rates spike. You don't notice.
At the 4–9 PM peak, your home quietly switches to the energy you stored for free.
The battery powers the night.
Through the electrical panel, stored sunlight runs the kitchen, the lights, the heat — and backs it all up if the grid fails.
The hardware, in detail
Three of the best batteries in residential solar
Whether you want one integrated unit, an AC-coupled all-in-one, or modular blocks you can stack over time, we install and warranty all three to the manufacturer's standard. Here are the exact specs.
Battery · Integrated solar inverter
Tesla Powerwall 3
Battery, solar inverter, and backup logic in one unit — fewer parts, cleaner install.
13.5 kWh
usable storage
11.5 kW
continuous power
20 kW
solar input
- Usable energy
- 13.5 kWh
- Continuous power
- 11.5 kW (on-grid)
- Integrated solar inverter
- Up to 20 kW across 6 MPPTs
- Motor-start capability
- 185 A LRA
- Scalability
- Up to 4 units in parallel
- Round-trip efficiency
- 97.5% (solar-to-grid)
- Enclosure / rating
- Indoor + outdoor · IP55 / IP67
- Operating temp.
- −4 °F to 122 °F
- All-in-one: the solar inverter is built into the battery, so there's one less box on your wall.
- 11.5 kW continuous output runs most homes without shedding loads.
- Starts big motor loads — AC compressors, pool pumps — at 185 A LRA.
- Drives up to 20 kW of solar directly across six MPPTs.
- Storm Watch pre-charges before forecast outages; managed entirely in the Tesla app.
10-year warranty · unlimited cycles · ≥70% capacity retained.
Battery · AC-coupled LFP
Enphase IQ Battery 10C
Safe LFP chemistry in a compact all-in-one AC battery — 10 kWh usable with four built-in grid-forming microinverters.
10.0 kWh
usable
7.08 kVA
continuous
15 yr
warranty
- Usable capacity
- 10.0 kWh
- Continuous power
- 7.08 kVA @ 240 V
- Peak output
- 56 A (three seconds)
- Power Start capability
- Up to 90 A LRA
- Chemistry
- Lithium iron phosphate (LFP)
- Embedded microinverters
- 4 × IQ8B (grid-forming)
- Round-trip efficiency
- 90% AC
- Safety
- UL 9540A evaluated
- Enclosure
- Outdoor NEMA 3R · passive cooling
- Safe, cobalt-free LFP chemistry with excellent thermal stability.
- All-in-one AC-coupled system — pairs with new solar or retrofits onto existing systems.
- Four embedded grid-forming IQ8B microinverters provide backup capability.
- Power Start handles motor loads — up to 90 A LRA.
- Passive cooling, no fans — quiet (under 33 dBA) and low-maintenance.
15-year warranty · 6,000 cycles · ≥60% capacity retained.
Battery · Modular LFP
SolarEdge Nexis Battery System
Modular LFP Battery Blocks that click together cable-free and scale from 4.65 to 18.6 kWh per stack.
4.65–18.6 kWh
usable per stack
13 kW
continuous
10 yr
warranty
- Usable energy
- 4.65 kWh per Battery Block
- Stack capacity
- 4.65–18.6 kWh (1–4 blocks)
- Continuous power
- Up to 13 kW charge/discharge (single stack)
- Scalability
- Up to 16 blocks per Nexis inverter
- Chemistry
- Lithium iron phosphate (LiFePO4)
- Round-trip efficiency
- 93% peak (DC)
- Coupling
- DC-coupled (AC-coupled pending firmware)
- Enclosure
- NEMA 4X · ThermoShield thermal management
- Modular LFP Battery Blocks — start at 4.65 kWh and grow to 18.6 kWh per stack.
- Up to 13 kW continuous charge/discharge from a single stack.
- Simple-Click cable-free assembly — blocks stack without wiring between them.
- ThermoShield thermal management protects the cells through SoCal heat.
- Scales to 16 Battery Blocks on one Nexis inverter for larger homes.
10-year warranty.
Why a battery is now standard
NEM 3.0 cut what utilities pay for exported solar by roughly 75%. Instead of selling power back cheaply, you store your own and use it when grid power is most expensive — the 4–9 PM peak when you're home and the sun is down.
- Self-consume your solar instead of exporting it cheaply
- Run the 4–9 PM peak on stored power
- Whole-home or essential-loads backup through outages
Torn between ecosystems? Read our installer's comparison of the Enphase IQ Battery 10C vs Powerwall 3.
Service areas
Where we install
Battery Storage across Southern and Central California — with in-house crews working from local offices. A few of the cities we serve:
Good questions
Battery Storage FAQ
It varies with quantity and your electrical setup; your proposal gives an exact itemized number. On a $0-down lease/PPA the battery can be one monthly payment.
More questions? Browse all 74 FAQs →
Rated 4.9★ on Google by Southern California homeowners. Read the reviews →
Why homeowners choose OC Solar
Powerwall 3 — Premier Certified
Tesla's highest installer tier. An all-in-one battery with a built-in solar inverter and whole-home backup.
Beat time-of-use rates
Charge on cheap daytime solar; discharge during the expensive 4–9 PM evening peak.
Outage protection
Keep essentials — or your whole home — running through PSPS shutoffs, automatically.
Enphase option too
Prefer AC-coupled storage with safe LFP chemistry that pairs with new or existing solar? We install the Enphase IQ Battery 10C.
Why homeowners choose OC Solar
Verified track record, in-house crews
10+
Years serving SoCal
Founded 2016
30+
MW installed
across Southern California
6,373+
Projects & service calls
by in-house crews
4.9★
Google rating
400+ reviews · BBB A+
Manufacturer certifications
1 of 12 installers- EnphaseInstaller NetworkStorage-certified · IQ Battery
- QcellsQ.PARTNERAuthorized installer
- RECCertified Solar ProfessionalProTrust warranty program
- SolarEdgeCertified Installer
- Owens CorningRoofing Preferred Contractor
Awards & recognition
2024- Solar Power WorldTop Solar Contractor2025#203 nationally
- PanasonicTop Residential Installer of the Year2023Southern California
- EY (Ernst & Young)Entrepreneur Of The Year — Finalist2025Pacific Southwest
- Orange County Business JournalExcellence in Entrepreneurship Award2026
- HouzzBest of Houzz2022
- AngiSuper Service Award2024
#1 in California2026- Best Equipment2026
- Best Installation2026
Ratings, license & partnership
Since 2017- Yelp4.7★ rating451 reviews
- Google4.9★ rating400+ reviews
- CSLBLicense #1023627Licensed · Bonded · Insured
Team partnership
Keep researching
Battery homework, done honestly
Powerwall cost, the rebate reality, the TOU math, and whether you need storage at all.
When storage pays under NEM 3.0 — and when it doesn't.
The honest 2026 status of California's battery rebate.
The rate mechanics that make storage pay.
Refer & earn
Refer a friend.
Get $500.
Know someone tired of rising utility bills? Send them our way. When your friend or family member goes solar with OC Solar, we'll thank you with $500.
- 1
Send their info
Share your friend's name and a way to reach them — takes a minute.
- 2
They go solar
We design, install, and power on their system, start to finish.
- 3
You get $500
Paid after their system is installed. Refer as many as you like.
Or call 949-427-8817 to refer someone. Terms apply.
Ready to take control of your power bill?
Get a fast, honest, no-pressure estimate from a real local advisor — built from your actual roof and usage.
Already a customer? Refer a friend & get $500 · See all OC Solar reviews
Licensed, Bonded & Insured · CSLB #1023627