BYD Battery-Box HV

5.1–10.2 kWh · 5.1–10.2 kW · Lithium Iron Phosphate · 3 configurations

UL 1973CEC listed · Nov 15, 2019

Usable energy5.1–10.2 kWh
Continuous power5.1–10.2 kW
Warranty10 years
ChemistryLithium Iron Phosphate

Overview

CEC Battery List

Battery-Box HV: 5.1–10.2 kWh usable energy; 5.1–10.2 kW continuous; lithium iron phosphate; 10 years warranty.

Models & configurations

CEC Battery List · 3 listings

Model	Energy	Power	Grid voltage	Round trip	CEC listed
Battery-BOX H 5.0	5.1 kWh	—	—	—	Nov 15, 2019
Battery-BOX H 7.5	7.7 kWh	—	—	—	Nov 15, 2019
Battery-BOX H 10.0	10.2 kWh	—	—	—	Nov 15, 2019

Capacity & power

CEC Battery List

Nameplate energy (CEC)5.1–10.2 kWh
Usable energy5.1–10.2 kWh
Max continuous discharge (CEC)5.1–10.2 kW
Continuous power (datasheet)5.1–10.2 kW
Peak power7.2 kW 10 s · 10.8 kW 10 s · 14.3 kW 10 s
Full-power discharge timeabout 0.5 h at full power
Round-trip efficiency (datasheet)95.3%
ChemistryLithium Iron Phosphate
Battery voltage (DC, nominal)204–409 V
Battery voltage range (DC)160–225 V · 240–338 V · 320–451 V

How long can it power your home?

Cali-Graf calculation

Average home load	Runtime from full
0.5 kW	≈ 10.2 h
1 kW	≈ 5.1 h
2 kW	≈ 2.6 h
3 kW	≈ 1.7 h
10.24 kW (full continuous power)	≈ 0.5 h

Runtime = 5.1 kWh usable (datasheet) ÷ load. A typical home averages 1–2 kW; air conditioning and EV charging use much more. Inverter and wiring losses shorten it.

Charging from solar in Southern California

NLR PVWatts v8 · Cali-Graf calculation

City	December	June
Los Angeles	1.6 kW	0.9 kW
Palmdale	1.5 kW	0.9 kW
Chula Vista	1.4 kW	1 kW
Huntington Beach	1.5 kW	1 kW
Riverside	1.5 kW	0.9 kW
Santa Clarita	1.5 kW	0.9 kW

Solar array size that refills the battery from empty in one average day, before the home uses any of it (NLR PVWatts v8, 20° south roof).

Installation & environment

CEC Battery List · BYD datasheet

Installation locationindoor/outdoor
Operating temperature−10 to 50 °C
Mountingground
Weight per kWh1 kWh

Warranty

CEC Battery List · BYD datasheet

Warranty term10 years

Safety listings

CEC Battery List

UL 1973 (stationary battery)Certified by UL
Certificate date & editionDec 21, 2018 · Ed. 2 : 2018
Other standards on datasheetUL 1973, UL 1642

Full specifications

CEC Battery List · BYD datasheet

Communicationrs485, can
Manufacturer websitebyd.com

Questions & answers

How much energy does the BYD Battery-Box HV store?

5.1–10.2 kWh usable, per the manufacturer datasheet.

How long can the Battery-Box HV power a home?

About 5.1 hours at an average 1 kW load from a full charge (5.1 kWh usable); higher loads shorten it.

Can the Battery-Box HV be installed outdoors?

Installation location per the datasheet: indoor/outdoor.

What warranty does the Battery-Box HV have?

10 years (datasheet).

Sources

California Energy Commission — Energy Storage System List, data as of Oct 7, 2026. Manufacturer-reported values confirmed by CEC against certificates.
California Energy Commission — Battery List, data as of Oct 7, 2026.
BYD — manufacturer datasheet “Battery-Box HV The battery for all applications–in direct High Voltage”.
NLR (formerly NREL) — PVWatts v8, NSRDB PSM v3 typical-year weather for Los Angeles, Palmdale, Riverside, Santa Clarita, Chula Vista, Huntington Beach.
Cali-Graf calculations — formulas and inputs are shown next to each calculated value (efficiency from area, temperature-corrected voltages, string sizing, energy estimates).