BYD Battery-Box Premium HVS

Numbers describe the HVS 10.2 configuration, a 4 module high voltage LFP stack rated at 10.24 kWh usable that requires a compatible external hybrid inverter, so its real backup and continuous power depend entirely on the paired inverter rather than the battery itself. BYD Battery-Box is a globally respected LFP platform, but in the US it moves almost exclusively through the solar installer channel with limited direct residential distribution, so most homeowners will get it only as part of an installer designed system.

Specifications

Chemistry

LFP

Usable capacity

10.24 kWh

Continuous power

Not published

Peak power

Not published

Round-trip efficiency

96%

Depth of discharge

100%

Warranty

10 year product warranty per the BYD Battery-Box Premium Limited Warranty Letter, conditions apply

Scalable to

Stackable from 5.1 to 12.8 kWh per HVS tower using 2 to 5 modules, and up to 38.4 kWh by paralleling 3 identical HVS stacks

Backup scope

Whole-home capable

Inverter

Needs a separate inverter

Weight

368 lb

Dimensions

48.3 x 23.0 x 11.7 in (1228 x 585 x 298 mm) for the HVS 10.2 tower

Efficiency basis: 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. Round-trip numbers are only comparable across brands when measured the same way, so read the basis before comparing.

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.