BYD Battery-Box Premium HVM
A high-voltage LFP battery tower built from 2.76 kWh modules, from 8.28 up to 22.08 kWh per tower, with IP55 housing for indoor or outdoor use.
- Best for 8 to 22 kWh towers
- Installed battery
- 8.28 to 22.08 kWh
- 10-year warranty
- Made by BYD.
- Capacity: 3 to 8 modules of 2.76 kWh, so 8.28, 11.04, 13.80, 16.56, 19.32 or 22.08 kWh usable per tower; up to 66.2 kWh with three towers.
- A battery only: it connects to a compatible single- or three-phase hybrid inverter (BYD keeps a compatibility list).
- Max output current 50 A (75 A for 3 seconds) at 153.6 to 409.6 V, depending on the number of modules.
- IP55, indoor or outdoor, floor stand. Round-trip efficiency 96% or more.
Not tested by us
We have not tested the BYD Battery-Box Premium HVM. The figures on this page come from the sources listed at the end of the page, checked on 11 November 2026, and we do not show prices. "Best for" is based on what the maker says the product is designed for, not on our own tests.
Key figures
22.08 kWh
Maximum usable per tower
≥ 96%
Round-trip efficiency
10 years
Warranty
Specifications
Last checked on 11 November 2026. The grey text under each name explains what the value means.
| Specification | Value |
|---|---|
| Storage | |
| CapacityHow much energy the battery stores. Bigger means longer runtime or more of your own solar power used later. | Usable energy by tower: 8.28 kWh (3 modules), 11.04 (4), 13.80 (5), 16.56 (6), 19.32 (7), 22.08 kWh (8); one module is 2.76 kWh, 51.2 V. Measured at 100% depth of discharge, 0.2C, 25 °C; system usable energy may vary with the inverter brand |
| Battery chemistryLFP (lithium iron phosphate) cells are known for long life and stable behaviour with heat. | Lithium iron phosphate (LiFePO4) |
| Cycle lifeHow many full charge and discharge cycles the cells are rated for before they hold less than the stated share of their original capacity. | Not stated on the datasheet |
| ExpansionExtra battery units that add storage to the same system. | Up to 3 towers (66.2 kWh in total, according to the datasheet cover) |
| Power | |
| Charge and discharge powerHow fast the battery can take in and give out energy. It sets how many devices it can serve at once. | Maximum output current 50 A and peak 75 A for 3 seconds on every size. Nominal voltage 153.6 V (3 modules) to 409.6 V (8 modules), operating range 120 to 472 V. Power derating occurs between -10 and +5 °C |
| Round-trip efficiencyThe share of the energy you put in that comes back out. The rest is lost as heat. | 96% or more |
| Backup in a power cutWhether it can keep selected circuits running during a grid outage. | Supported with a compatible inverter (the datasheet lists 'On Grid + Backup' and 'Off Grid' applications) |
| Solar | |
| Solar inverterTurns the DC power from solar panels into AC for the home. Built in means no separate solar inverter is needed. | None: a battery only, used with a compatible inverter |
| Connection and housing | |
| Dimensions (H × W × D)Check the wall or floor space before you buy, including room for airflow and cables. | From 995 × 585 × 298 mm (3 modules) to 2,160 × 585 × 298 mm (8 modules) |
| WeightMatters for lifting, wall mounting and moving it. | 119 to 129 kg (3 modules) up to 291 to 319 kg (8 modules); two module versions exist that differ only in weight (35 or 38 kg per module) |
| Protection ratingIP ratings show protection from dust and water. IP55 and IP65 are rated for outdoor-style exposure; check the installation guidance. | IP55, indoor or outdoor, floor stand |
| Operating temperatureThe range it is rated to work in. Cold and heat can reduce performance. | -10 to 50 °C |
| ConnectivityHow you monitor and control it, usually through an app. | CAN / RS485 to the inverter |
| CertificationsSafety and grid standards the maker says the product meets. | VDE 2510-50, IEC 62619, CEC, CE, UN 38.3 |
| Warranty | |
| WarrantyThe period the maker covers. Read the terms: conditions and capacity guarantees differ. | 10 years; conditions apply, see the BYD limited warranty letter (Europe) |
Compatible with
What BYD says this product works with. Anything not listed here is not confirmed.
- Inverters
- Leading single- and three-phase inverters; BYD publishes a compatible inverter list that gives the required number of modules for each inverter.
- Mixed modules
- The two module versions can be stacked in one tower; the weight of the tower varies.
Rules where you live
An installed battery normally needs a qualified electrician, and in many countries you must also tell your grid operator, especially if it can export. This is not a plug-in battery. Rules, incentives and tax treatment differ by country: see our country guides for what applies where you live.
Strengths and things to check
Strengths
- Modular towers from 8.28 to 22.08 kWh
- 96% or more round-trip efficiency
- IP55, indoor or outdoor
- 10-year warranty
Worth checking before you buy
- A battery only: you need a compatible hybrid inverter
- Heavy: 119 to 319 kg per tower
- Cycle life is not on the datasheet
- Power derating between -10 and +5 °C
Change log
We record changes to this page here, so you can see when figures such as the warranty were last updated.
- 11 November 2026
- Page published. Figures are from the BYD HVM datasheet (V1.0, March 2025, English). Warranty at publication: 10 years (conditions in the BYD warranty letter, not read in full here). BYD also lists the HVS, which has its own page.
Where this information comes from
We have not tested this battery. Every figure above comes from BYD's HVM datasheet (English, V1.0) and the BYD Battery-Box warranty letter, last checked on 11 November 2026. A value that these sources do not state is shown as not stated.
We do not show prices, because they depend on the installer's quote.
- Manufacturer BYD Battery-Box Premium HVM datasheet (V1.0, March 2025)
- Manufacturer BYD Battery-Box Premium HVS & HVM limited warranty, Europe (EN)
Spotted an error?
Tell us through the contact form on our About Us page.
Common questions about BYD Battery-Box Premium HVM
How much does the BYD Battery-Box Premium HVM store?
A tower has 3 to 8 modules of 2.76 kWh, so 8.28 to 22.08 kWh usable. BYD's datasheet cover mentions up to 66.2 kWh with three towers.
Does it include an inverter?
No. It is a high-voltage battery for use with a compatible single- or three-phase inverter; BYD publishes a compatibility list.
Can it be installed outdoors?
BYD lists IP55 and describes the environment as indoor or outdoor, on a floor stand, with an operating range of -10 to 50 °C.
Related guides
Does a modular battery fit your home?
Our calculator uses your own usage and tariff to estimate what a home battery could save, with conservative assumptions.