Tesla Powerwall 3 the house that doesn't blink.
A sealed home battery with 13.5 kWh energy and 11.5 kW continuous power — enough to carry a real home through the evening peak and straight through an outage. Designed, permitted, and installed by OC Solar's in-house crews.
Built for the weather, the warranty, and the long run
It lives outside in the weather.
Rain, heat waves, marine-layer damp — the case is sealed and rated for all of it, mounted on the wall or the floor. It works every day, not just the day the grid fails.
Warrantied like it plans to stay.
The warranty runs a decade, the retention floor is in writing, and daily solar cycling never counts against it.
Installed by the crew that answers for it.
Designed, permitted, and installed by OC Solar's in-house crews — a Tesla Powerwall Premier Certified installer and one accountable team from the first site visit to permission to operate.
- Years serving SoCal
- 10+
- Installed capacity
- 30+ MW
- Projects & service calls
- 6,373
- Google rating (400+)
- 4.8★
Years serving SoCal
Installed capacity
Projects & service calls
Google rating (400+)
The camera arcs around a Tesla Powerwall 3 mounted on white stucco in golden light.
Tesla Powerwall 3: 13.5 kWh AC (nominal), 11.5 kW AC maximum continuous discharge of continuous power.
The solar inverter is built in — 6 MPPTs accepting up to 20 kW DC maximum solar STC input.
One sealed case, 1099 x 609 x 193 mm (43.25 x 24 x 7.6 in), 130 kg (287 lb).
One sealed unit. The entire system.
Powerwall 3 isn't a battery that needs a separate inverter bolted next to it — the solar inverter is built in. Your panels wire straight into the unit, so the wall stays clean, the design stays simple, and one piece of hardware handles solar conversion, storage, and backup.
Strong enough to start the A/C. Quiet enough to forget.
Exploded engineering film
How Tesla Powerwall 3 comes apart — and comes home.
Disassembled, inspected, reassembled, then installed on the same Southern California home used throughout the product film.
Every unit carries Tesla's 10-year warranty — unlimited cycles for solar self-consumption, time-based control, and backup.†5
Dinner, uninterrupted: a family eats as the grid drops — the lights never flicker.
Backup Switch/Gateway automatically detects grid outages, providing a seamless transition to backup power.
The camera pulls back: the whole street is dark, one house is glowing, and its porch lantern blooms on.
Whole home backup; a single unit can support the power needs of most homes. Up to 4 Powerwall 3 units supported.
The rest of the system.
Tech specs
Tesla Powerwall 3, by the numbers
Every figure below is read directly from Tesla's Powerwall 3 datasheet and warranty documents — the same sources our designers work from.
Battery
| Energy capacity | 13.5 kWh AC (nominal) |
|---|---|
| Continuous power | 11.5 kW AC maximum continuous discharge |
| Motor start capability | 185 A LRA (1 s) |
| Solar-to-battery-to-home efficiency | 89% (typical solar shifting use case) |
| Power scalability | Up to 4 Powerwall 3 units supported |
| Energy scalability | Up to 3 Expansion units (for a maximum total of 7 units) |
| Expansion unit capacity | 13.5 kWh nominal per Powerwall 3 Expansion unit (connected in parallel; only compatible with Powerwall 3) |
| Expansion stacking | Up to 3 Expansion units stack behind a Powerwall 3 (floor mount only) |
Solar inverter
| Solar inverter | Fully integrated solar and battery system |
|---|---|
| Solar inputs | 6 MPPTs |
| Max solar input | 20 kW DC maximum solar STC input |
| Solar-to-home efficiency | 97.5% (CEC weighted methodology) |
Warranty
| Warranty | 10 years |
|---|---|
| Warrantied capacity retention | 70% energy retention at 10 years from initial installation |
| Cycle limits | Unlimited cycles for solar self-consumption, time-based control, and backup |
Environment & mechanical
| Operating temperature | -20C to 50C (-4F to 122F); may de-rate above 40C (104F) |
|---|---|
| Enclosure | NEMA 3R, indoor and outdoor rated |
| Water resistance | IPX7 (battery & power electronics); IPX5 (wiring compartment) |
| Noise | <50 dB(A) typical, <62 dB(A) maximum at 1 m |
| Dimensions | 1099 x 609 x 193 mm (43.25 x 24 x 7.6 in) |
| Weight | 130 kg (287 lb) |
| Mounting | Floor or wall mount |
Connectivity & compliance
| Connectivity | Wi-Fi (2.4/5 GHz), dual-port switched Ethernet, Cellular LTE/4G (coverage-dependent) |
|---|---|
| Metering | Revenue grade (+/- 0.5%) |
| Fire testing | Meets the unit level performance criteria of UL 9540A |
| Seismic rating | AC156, IEEE 693-2005 (high) |
Source: Powerwall_3_Datasheet_NA-EN.pdf · Powerwall-3-Datasheet.pdf (2025 NA, energylibrary.tesla.com) · Powerwall_Warranty_US-EN.pdf (Rev 2.6).
OC Solar — Tesla Powerwall Premier Certified Installer
Tesla Pro Council — 1 of 12 installers — Founder Vinnie Curcie sits on Tesla's 12-member installer advisory council.
- No. 5Installer in CaliforniaSolar Power World 2026 · Official 2026 Residential list filtered to State = California and Primary Service = Installer.View residential table
- No. 3Installer nationally for Solar + StorageOfficial 2026 Solar + Storage table filtered to Primary Service = Installer · Storage kWh may span markets.View Solar + Storage table
- 5.0★EnergySage rating25 reviews · verified 2026-07-21View EnergySage profile
Solar Power World list positions use official 2026 table data; displayed overall ranks and filtered installer positions use different cuts. Ranking methodology.
Good questions
Tesla Powerwall 3 FAQ
Per Tesla's datasheet: 13.5 kWh AC (nominal) of storage, 11.5 kW AC maximum continuous discharge, 185 A LRA (1 s) of motor-start capability, a built-in solar inverter with 6 MPPTs accepting 20 kW DC maximum solar STC input, 97.5% (CEC weighted methodology) solar-to-home efficiency, an operating range of -20C to 50C (-4F to 122F), a 1099 x 609 x 193 mm (43.25 x 24 x 7.6 in) case weighing 130 kg (287 lb), and a warranty of 10 years. The spec table above lists every row with its source document.
Each Powerwall 3 stores 13.5 kWh AC (nominal) and delivers up to 11.5 kW AC maximum continuous discharge. Systems support up to 4 powerwall 3 units supported, so we size the bank to your home's actual loads rather than a one-size answer.
Two ways to scale, per Tesla's datasheet. For more power: up to 4 Powerwall 3 units supported per system, each with its own built-in inverter. For more storage at lower cost: up to 3 Expansion units (for a maximum total of 7 units), each storing 13.5 kWh. Floor-mounted Expansion units stack physically behind the Powerwall 3. We size the bank to your loads and backup goals during the site review.
Per Tesla's datasheet, a single unit can support the power needs of most homes, with 185 A LRA (1 s) of motor-start capability for heavy loads like air conditioners. During your site review we model your panel, your loads, and your backup goals, then recommend one unit or several based on what the numbers actually show.
Yes — it's a fully integrated solar and battery system, so no separate string inverter is needed. Solar connects directly through 6 MPPTs accepting up to 20 kW DC maximum solar STC input, at 97.5% (CEC weighted methodology) solar-to-home efficiency. That means less hardware on the wall in most new installs.
Yes. It's rated NEMA 3R, indoor and outdoor rated, operates from -20C to 50C (-4F to 122F), and carries an IPX7 (battery & power electronics) water-resistance rating — it's engineered to live on an exterior wall in Southern California weather.
Quiet: <50 dB(A) typical, <62 dB(A) maximum at 1 m per the datasheet — in practice, quieter than normal conversation. Most homeowners forget it's running.
Tesla warranties the unit for 10 years with 70% energy retention at 10 years from initial installation, and unlimited cycles for solar self-consumption, time-based control, and backup. OC Solar's in-house workmanship coverage stands on top — the crew that installs it is the crew that answers for it.
A Tesla-certified Powerwall 3 installer — the unit ties into your main electrical panel, your solar, and your utility interconnection, so the installer's license and electrical experience matter as much as the hardware. OC Solar is a Tesla Powerwall Premier Certified installer with in-house crews handling design, permitting, installation, and PTO across Orange County and Southern California.
Prefer to talk it through? Talk to a Powerwall specialist
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†1<50 dB(A) typical, <62 dB(A) maximum at 1 m — Powerwall_3_Datasheet_NA-EN.pdf, p3, Environmental Specifications.
†2185 A LRA (1 s) — Powerwall_3_Datasheet_NA-EN.pdf, p2, Battery Technical Specifications.
†313.5 kWh AC (nominal) — Powerwall_3_Datasheet_NA-EN.pdf, p2, Battery Technical Specifications.
†411.5 kW AC maximum continuous discharge — Powerwall_3_Datasheet_NA-EN.pdf, p2, Battery Technical Specifications.
†510 years — Powerwall_3_Datasheet_NA-EN.pdf; Powerwall_Warranty_US-EN.pdf (Rev 2.6), Datasheet p2; Warranty p1.
†6Unlimited cycles for solar self-consumption, time-based control, and backup — Powerwall_Warranty_US-EN.pdf (Rev 2.6), p1, Ten Year Limited Warranty table.
†7Backup Switch/Gateway automatically detects grid outages, providing a seamless transition to backup power — Powerwall_3_Datasheet_NA-EN.pdf, p5 Backup Switch; p6 Backup Gateway 2.
†8Whole home backup; a single unit can support the power needs of most homes — Powerwall_3_Datasheet_NA-EN.pdf, p1, overview.
†9Up to 4 Powerwall 3 units supported — Powerwall_3_Datasheet_NA-EN.pdf, p2, Battery Technical Specifications.
Final system design is confirmed for your specific home.