Tesla Powerwall 3 Dimensions, Weight and Specs: Will It Fit Where You Want It? (2026)

The Tesla Powerwall 3 stands 43.25 inches tall, 24 inches wide, and 7.6 inches deep, and tips the scale at 287 pounds before the wall bracket is added. That footprint is meaningfully different from the older Powerwall 2, and understanding it before your installer arrives is the difference between a clean one-day job and a redesign at the permit stage.

Last verified: October 2026 by Helios Energy Global.

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The Powerwall 3 by the numbers

Tesla's official datasheet lists the Powerwall 3 dimensions as 1,105 × 609 × 193 mm (43.5 × 24 × 7.6 in), with a total installed unit weight of 132 kg (291.2 lb) — that figure includes the 6.5 kg glass front cover and the 1.9 kg wall bracket. The Powerwall 3 unit itself weighs 124 kg (272.5 lb).

The North America-specific datasheet confirms **13.5 kWh nominal battery energy (AC), 11.5 kW maximum continuous discharge power, 5 kW maximum continuous charge power, and a load-start capability of 185 A locked rotor amps (LRA).

Operating temperature runs from –20 °C to 50 °C (–4 °F to 122 °F), and the unit carries an IP55 enclosure rating (IP67 for the battery and power electronics themselves), making it rated for both indoor and outdoor installation.

Mounting options are floor or wall mount — both are fully supported by Tesla's bracket system.

Powerwall 3 Expansion unit

The Powerwall 3 Expansion unit shares the same height and width — 1,105 × 609 mm — but is shallower at 168 mm (6.6 in) deep. The total wall-mounted weight of the Expansion unit is 118.5 kg (261.2 lb); the Expansion unit itself weighs 110 kg (242.5 lb). The Expansion adds another 13.5 kWh of storage capacity and stacks alongside (not on top of) a base Powerwall 3. For more on how Expansion units work in a multi-battery system, see our guide on the Tesla Powerwall 3 Expansion Pack.

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Key specs at a glance

Component	Height	Width	Depth	Weight (installed)	Capacity / Power
Powerwall 3 (unit only)	43.5 in (1,105 mm)	24 in (609 mm)	7.6 in (193 mm)	291 lb est. (132 kg)	13.5 kWh / 11.5 kW cont.
Powerwall 3 Expansion	43.5 in (1,105 mm)	24 in (609 mm)	6.6 in (168 mm)	261 lb est. (118.5 kg)	13.5 kWh (no inverter)
Backup Gateway 2	26 in (660 mm)	16 in (411 mm)	6 in (149 mm)	45 lb (20.4 kg)	Transfer switch / monitor
Gateway 3	26 in (660 mm)	16 in (411 mm)	6 in (149 mm)	36 lb (16.3 kg)	Transfer switch / monitor

Weights are installed-unit totals per Tesla's 2025 Powerwall 3 datasheet. Dimensions include glass front cover where applicable.

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Clearances Tesla requires around the unit

Powerwall 3 requires adequate clearance for installation, cabling, and airflow. The spacing on either side of units and between units is required to ensure sufficient clearance for venting and thermal management features.

Tesla's installation manual specifies the following minimum mounting clearances:

• Minimum lateral wall space: 32 in (808 mm)
• Minimum clearance from left side: 4 in (100 mm)
• Minimum clearance from right side: 4 in (100 mm)
• Minimum clearance above Powerwall: 2 in (50 mm)
• Minimum clearance below Powerwall: 0.8 in (20 mm)
• Minimum clearance between side-by-side Powerwalls: 4 in (100 mm) — Tesla recommends 6 in (150 mm) to allow adequate space for wiring
• Minimum clearance in front of Powerwall: 12 in (300 mm)
• Maximum height of bottom of unit above ground: 45 in (1,140 mm)

Do not install anything inside the required clearance above the Powerwall 3, or anything that might fall and damage the unit. Do not mount Powerwall 3 horizontally or upside down.

What that means in practice for a two-unit system: Two Powerwalls side by side need roughly 60 inches (5 feet) of unobstructed wall width when you add the 24-inch body of each unit plus the recommended 6-inch gap between them and 4-inch clearances on each outer side. Plan that wall section before your panel upgrade or conduit rough-in.

Indoor room size requirement

When installing Powerwall 3 indoors, the room must be at least 5.25 × 5.25 × 8 ft (1.6 × 1.6 × 2.4 m) or an equivalent room volume, per UL 9540 and UL 9540A. This is the minimum room size for any Powerwall 3 system, regardless of whether it includes multiple Powerwall 3 and/or Expansion units. Most Southern California attached garages clear this easily; a small utility closet typically does not.

Gateway clearances

The Gateway 3 installation manual requires the following minimum clearances around the Gateway enclosure: top 2 in (50 mm), left side 2 in (50 mm), right side 3 in (75 mm), and front 17 in (430 mm). The front clearance is required to install and open the Gateway door. Because the Gateway 3 and Backup Gateway 2 share the same enclosure footprint (26 × 16 × 6 in), plan for roughly 3 feet of clear wall space to accommodate the Gateway alongside the Powerwall when co-locating equipment.

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Where Powerwalls go in Southern California homes

The vast majority of Helios installations in the Los Angeles basin land in one of three spots:

1. Garage side wall (most common) An attached garage wall adjacent to or near the main electrical panel is the default choice. The drywall already provides the fire separation California requires between the garage and living space, conduit runs are short, and the unit stays out of direct sun. If the Powerwall sits in the path of a parked vehicle, California code requires vehicle deterrents (typically steel bollards).

2. Exterior side yard wall A side yard is ideal when the garage is full or the panel is on an exterior wall. ESS units installed outdoors must be at least 3 feet from doors and operable windows, and they cannot be installed in sleeping rooms or below stairs serving an exit.

The default clearance for outdoor ESS from lot lines is 10 feet.

You can reduce that to 3 feet when you add one of the code-recognized protections, such as a 1-hour free-standing exterior fire barrier. A Powerwall right at the property line (0 ft) is not compliant; aim for 3 ft if your configuration fits the California Residential Code table for small residential ESS.

3. Exterior wall directly adjacent to the main panel

Tesla's own System Design Guide lists an exterior wall within 10 feet of the meter as the most preferable location because it minimizes conduit length and keeps voltage drop low. In Southern California's mild climate, outdoor installation is rarely a thermal concern — the Powerwall 3's operating range runs to 122 °F, which covers even the hottest Inland Empire summer days.

What makes a spot unsuitable

Per Tesla's System Design Guide, Powerwall 3 may not be mounted in habitable spaces (defined as any location used for sleeping, lounging, cooking, or eating) or interior hallways.

Tesla's installation manual explicitly warns that Powerwall is not intended for installation in habitable spaces and living spaces in dwelling units.

Additional red flags that come up regularly in SoCal permit reviews:

Setbacks from windows and doors entering living space; drywall requirements for interior installations; interconnected heat detectors for interior installations; and vehicle deterrents when the Powerwall is in the path of a vehicle.

The total energy capacity in a dwelling unit is capped at 40 kWh in attached garages, accessory structures, and outdoor wall installations, and 80 kWh total for the dwelling — relevant if you're planning a three- or four-unit system.

Outdoor wall installations need a noncombustible barrier when the wall has combustible siding.

If your preferred spot fails any of these tests, our team will find the next-best location during the design phase — before permits are pulled.

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The electrical hardware that shares the wall

A Powerwall 3 system is not just the battery box. Depending on your configuration, the wall also carries:

• Gateway 3 or Backup Gateway 2 — the 26 × 16 × 6 in transfer-switch enclosure that sits beside the Powerwall. Tesla's Gateway 3 controls connection to the grid, automatically detecting outages and providing seamless transition to backup power. Co-locating it with the Powerwall keeps conduit runs short and simplifies commissioning.
• Backup Switch — a smaller alternative to the full Gateway for simpler whole-home backup configurations.
• AC and DC disconnects — required by the NEC and California electrical code; typically mounted adjacent to the Powerwall.
• Main panel or subpanel — if your existing panel is undersized or lacks the breaker slots needed, a main panel upgrade may be required. At Helios, that adds roughly $3,000–$5,000 to the project.

When deciding where each component will be mounted, consider product clearances, environmental requirements, code restrictions, and overall installation efficiency. Best practice is to co-locate equipment to minimize conduit runs and minimize aesthetic impact to the home.

Rough wall budget for a typical one-Powerwall system: The Powerwall 3 body is 24 in wide; add 4-in clearances on each side and you consume about 32 in of wall. The Gateway 3 is 16 in wide; with its clearances, add another 21–22 in. A single-unit system with a Gateway needs roughly 4.5–5 linear feet of wall clear of obstructions, measured from floor to at least 4 feet up. A two-Powerwall system with a Gateway needs closer to 7–8 feet.

Note that Powerwall 3 cannot be mounted in a stacked configuration. Units must be mounted side-by-side to ensure the wiring compartment remains accessible.

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How the Powerwall 3 compares with the Powerwall 2 in size

The Powerwall 2 measured 1,150 × 753 × 147 mm (45.3 × 29.6 × 5.8 in) and weighed 114 kg (251 lb). The Powerwall 3 is 1,105 × 609 × 193 mm and weighs 130 kg (287 lb).

The Powerwall 3 has a smaller footprint than the Powerwall 2 — it's narrower and slightly shorter — but thicker front to back. That's worth knowing if you're checking whether it will fit an existing wall space or mounting bracket. The Powerwall 2's bracket will not transfer; a new wall bracket ships with every Powerwall 3.

Beyond the physical difference, the Powerwall 3 integrates a solar inverter that the Powerwall 2 lacked, which is why the depth increased. For a full performance comparison, see our dedicated guide: Powerwall 2 vs. Powerwall 3 in California.

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Installed cost in Southern California

Helios is a Tesla Certified Installer. A single Powerwall 3 installed runs $14,500–$18,500; two units run $24,000–$30,000; each additional Expansion unit adds $8,000–$11,500. The full pricing breakdown — including how system size, panel work, and permitting affect the total — lives on our Powerwall 3 cost page. SGIP residential battery rebates are waitlisted in 2026, so budget the full gross cost for now.

For a deeper look at the hardware itself, see our Tesla Powerwall 3 review and the full installation cost and permit breakdown for California.

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Frequently asked questions about Powerwall 3 dimensions and fit

How wide does the wall need to be for a Tesla Powerwall 3?

Tesla's installation manual requires a minimum lateral wall space of 32 inches (808 mm) — that's 4 inches of clearance on each side of the 24-inch-wide unit body. In practice, plan for at least 36–40 inches of clear wall to give your installer comfortable working room and to accommodate conduit entries.

Can the Powerwall 3 be installed on a floor instead of a wall?

Yes — Tesla supports both floor and wall mounting. Floor mounting is common in Southern California garages where the stud layout or panel location makes wall-mounting awkward. A floor-mount kit ships with the unit; the same clearance rules apply.

Can two Powerwall 3 units be stacked vertically to save floor space?

No. Powerwall 3 cannot be mounted in a stacked configuration. Units must be mounted side-by-side to ensure the wiring compartment remains accessible. Two units side by side need roughly 5 feet of clear wall width.

Is the Powerwall 3 rated for outdoor installation in Southern California's heat?

Yes. The Powerwall 3 is rated for both indoor and outdoor installation, with an operating temperature range of –20 °C to 50 °C (–4 °F to 122 °F) and an IP55 enclosure rating. That upper limit comfortably covers even the hottest recorded temperatures in the San Fernando Valley and Inland Empire.

How far does a Powerwall 3 need to be from windows and doors?

When installed outdoors, ESS units must be at least 3 feet from doors and operable windows. This is a California Residential Code R327 requirement, not just a Tesla preference, and it is enforced at permit inspection. Interior garage installations follow separate drywall and heat-detector rules rather than the 3-foot window setback.

Does the Powerwall 3 need its own dedicated room?

When installed indoors, the room must be at least 5.25 × 5.25 × 8 ft, per UL 9540 and UL 9540A. This minimum applies to any Powerwall 3 system regardless of how many units or Expansion units are included. A standard single-car garage bay easily meets this requirement; a small utility closet typically does not.

What happens if my main panel is on the opposite side of the house from the best battery location?

Longer conduit runs add labor cost and can complicate permitting, but they are not a disqualifier. Tesla's design guide lists an exterior wall greater than 10 feet from the meter as an acceptable (if less preferred) location, and an interior non-habitable space greater than 10 feet from the meter as a fourth-tier option. Your Helios designer will map the conduit path and flag any NEC 110.26 working-clearance conflicts before the permit is submitted.

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Next steps

• Book a free consultation and custom design — Helios will confirm your preferred location meets clearance, fire-code, and utility rules before a single permit is filed.
• Explore battery options and compare models — see how the Powerwall 3 stacks up against the Enphase IQ Battery 10C and FranklinWH aPower 2.
• See the full Powerwall 3 installation cost breakdown for California — labor, permits, panel work, and what drives the range.
• Read the Powerwall 3 Expansion Pack guide — if you're planning a two- or three-unit system, this explains how Expansion units connect and what extra wall space they need.
• Understand NEM 3.0 and why storage matters for SCE customers — the rate structure that makes battery sizing so consequential in Southern California.
• Find your nearest Helios service area — we serve Santa Monica, the Westside, the San Fernando Valley, the South Bay, and communities across greater Los Angeles.