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Tesla Powerwall 3 - Specs, Cost & Full Review

The most popular home battery in the US. Integrates natively with Tesla Solar and third-party solar systems.

Capacity
13.5 kWh

Usable energy storage

Power Output
11.5 kW

Continuous AC power

Efficiency
97.5%

Round-trip efficiency

Warranty
10 years

37,800 kWh throughput

Cost & Tax Credit

Average Installed Cost

$12,000

Range: $11,000–$16,000

Federal ITC (30%)

-$3,600

Qualifies with solar system

Net Cost After ITC

$8,400

Your effective investment

ITC Eligibility: The Tesla Powerwall 3 qualifies for the 30% federal Investment Tax Credit when installed with a solar system, or as a standalone unit charged exclusively by solar. File IRS Form 5695 with your federal return. Calculate your credit →

Technical Specifications

BrandTesla
ModelPowerwall 3
Battery ChemistryLithium Iron Phosphate (LFP)
Usable Capacity13.5 kWh
Continuous Power Output11.5 kW
Round-Trip Efficiency97.5%
Warranty Duration10 years
Warranty Throughput37,800 kWh
Grid-Tied OperationYes
Off-Grid CapableYes
Scalable / StackableYes
Market Share (US)38%
Average Installed Cost$11,000–$16,000

Pros & Cons

Pros

  • High power output (11.5kW)
  • Native solar + EV integration
  • Industry-leading 97.5% efficiency
  • Weather-resistant outdoor installation

Cons

  • Must be installed by Tesla-certified installer
  • Price non-negotiable (Tesla sets it)
  • Long lead times in some markets

Is the Tesla Powerwall 3 Worth It?

The Tesla Powerwall 3 is the best all-around home battery for most homeowners. Its 11.5 kW power output handles the most demanding whole-home loads, and 97.5% efficiency means minimal energy loss. The 30% ITC drops the effective cost to around $8,400, with payback typically in 8-12 years depending on your electricity rates. The main drawbacks - Tesla-only installers and fixed pricing - are real but minor for most buyers. If you want the market leader with proven performance and broad installer access, the Powerwall 3 is the clear choice.

Works Best With

Tesla SolarEnphaseSolarEdgeSMAFronius

Compatibility based on manufacturer specifications. Always confirm compatibility with your installer before purchase.

Tesla Powerwall 3 - FAQ

The Tesla Powerwall 3 typically costs $11,000–$16,000 fully installed, averaging around $12,000. Tesla controls pricing directly, so quotes are consistent across installers. The 30% federal ITC reduces net cost to approximately $8,400.
Tesla warrants the Powerwall 3 for 10 years or 37,800 kWh of throughput, whichever comes first. With typical daily cycling, the battery is designed to retain at least 70% of its original capacity at the end of the warranty period. Actual lifespan is often 12–15 years.
Yes. While it integrates natively with Tesla Solar panels and inverters, the Powerwall 3 includes a built-in inverter and works with most third-party solar systems. Installation by a Tesla-certified installer is required regardless of which solar brand you use.
Yes. The Powerwall 3 qualifies for the 30% federal Investment Tax Credit (ITC) when installed with a solar system, or as a standalone battery if it is charged exclusively by solar (not the grid). File IRS Form 5695 with your federal tax return.
With 11.5 kW of continuous power output, the Powerwall 3 can run most whole-home loads including air conditioning, appliances, and EV charging simultaneously. A single unit provides 13.5 kWh of storage — enough for 10–16 hours of essential loads in most homes.

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Specifications sourced from manufacturer documentation. Pricing based on EnergySage installer data • Updated 2026.