The Home Battery ReportIndependent · No installer money

BYD Battery-Box Premium HVS vs Tesla Powerwall 3

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.

Figure - Specs to scalebars vs the largest in our database
BYD Battery-Box Premium HVS versus Tesla Powerwall 3: specs to scaleHorizontal bars comparing usable capacity, continuous power, warranty for BYD Battery-Box Premium HVS and Tesla Powerwall 3, each scaled against the largest value in the home battery database.BYD Battery-Box Premium HVSTesla Powerwall 3Usable capacity10.24 kWh13.5 kWhContinuous powerNot published11.5 kWWarranty10 yr10 yr
SpecBYD Battery-Box Premium HVSTesla Powerwall 3
ChemistryLFPNot published
Usable capacity10.24 kWh13.5 kWh
Continuous powerNot published11.5 kW
Peak powerNot publishedNot published
Round-trip efficiency96%89%
Warranty10 year product warranty per the BYD Battery-Box Premium Limited Warranty Letter, conditions apply10 years
Backup scopeWhole-home capableWhole-home capable
InverterSeparateIntegrated

What actually differs

  • More usable capacity: the Tesla Powerwall 3 offers 13.5 kWh vs 10.24 kWh, so at that size it carries more of your home for longer per charge.
  • Integration: the Tesla Powerwall 3 has a built-in inverter, while the BYD Battery-Box Premium HVS needs a separate one, which affects install cost and complexity.
  • Efficiency is not apples to apples here: the BYD Battery-Box Premium HVS quotes 96% (BYD datasheet lists round trip efficiency as greater than or equal to 96 percent; the datasheet states no test conditions or AC to DC basis for this figure) and the Tesla Powerwall 3 quotes 89% (solar round trip (solar to battery to home), CEC weighted; not a pure AC to AC figure), so do not read the raw numbers as a direct ranking.

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 →

Sources

Source: BYD Battery-Box Premium HVS and HVM Datasheet V1.7 EN. Specs verified 2026-07-01. Figures are per single unit at beginning of life; confirm the current datasheet with your installer.

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.