Tesla Powerwall 3 vs Tesla Powerwall 2
A straight, side by side read on specs and warranties, with the honest caveats. Every figure is from the manufacturer datasheet; sources are at the bottom.
| Spec | Tesla Powerwall 3 | Tesla Powerwall 2 |
|---|---|---|
| Chemistry | Not published | lithium-ion |
| Usable capacity | 13.5 kWh | 13.5 kWh |
| Continuous power | 11.5 kW | 5 kW |
| Peak power | Not published | 7 kW |
| Round-trip efficiency | 89% | 90% |
| Warranty | 10 years | 10 year limited warranty |
| Backup scope | Whole-home capable | Whole-home capable |
| Inverter | Integrated | Integrated |
What actually differs
- More continuous power: the Tesla Powerwall 3 sustains 11.5 kW vs 5 kW, which matters for running big loads like an AC at once.
- Efficiency is not apples to apples here: the Tesla Powerwall 3 quotes 89% (solar round trip (solar to battery to home); not a pure AC to AC figure) and the Tesla Powerwall 2 quotes 90% (AC to battery to AC round trip at beginning of life, measured at 25C and 3.3 kW charge and discharge power), so do not read the raw numbers as a direct ranking.
- Availability: the Tesla Powerwall 2 is effectively discontinued, so for a new install it is not a real option regardless of specs.
Which one pays off is a numbers question.
Neither spec sheet tells you the payback in your home. That comes from your rate plan and incentives.
Run the Worth It calculator →Powerwall 3 vs Powerwall 2 FAQ
Is the Tesla Powerwall 3 or the Tesla Powerwall 2 better?
Neither is universally better. The Tesla Powerwall 3 delivers more continuous power (11.5 kW vs 5 kW). The right pick depends on your home's loads, backup needs, and budget, not the brand on the box.
What is the difference in usable capacity between the Tesla Powerwall 3 and the Tesla Powerwall 2?
Both list 13.5 kWh of usable capacity.
Which has more continuous power, the Tesla Powerwall 3 or the Tesla Powerwall 2?
The Tesla Powerwall 3 sustains 11.5 kW continuous vs 5 kW, which matters for running big loads like an air conditioner at once.
Is the Tesla Powerwall 3 or the Tesla Powerwall 2 cheaper?
Neither spec sheet tells you the installed cost or the payback in your home. That depends on your electricity rate plan and local incentives, so run the numbers for your address rather than comparing sticker prices.
Is the Tesla Powerwall 2 still available?
The Tesla Powerwall 2 is effectively discontinued, so for a new install it is not a real option regardless of how its specs compare.
Sources
Source: Tesla Powerwall 3 datasheet, 2026. Specs verified 2026-07-01. Figures are per single unit at beginning of life; confirm the current datasheet with your installer.
Source: Tesla Powerwall 2 AC Datasheet, North America. Specs verified 2026-08-06. Figures are per single unit at beginning of life; confirm the current datasheet with your installer.