High voltage
FoxESS
EQ Battery (EQ4800 / EQ6000 Plus)
BYD Battery-Box Premium HVS 5.1
High voltage
F3 · Flat-sized (3–8 kWh)
BYD BYD Battery-Box Premium HVS 5.1
Price
Not available
JouleSpecs does not sell and does not show shop prices: check the price where you buy.
Data from official source
High-voltage tower with lithium iron phosphate (LiFePO4) cells and 5.12 kWh usable.
It works with a compatible inverter chosen separately, and the official list of approved models covers sixteen brands. For each model, the list gives the number of modules allowed and the minimum firmware version.
The system is expandable: more modules can be added later, up to 38.4 kWh.
01 · Verified data
Technical specifications
Usable capacity
5.12 kWh
Cell chemistry
LFP (lithium iron phosphate)
Round-trip efficiency
96 %
Standby consumption
BYD does not state it.
| Parameter | Value | Source |
|---|---|---|
| Dimensions | 58.5 × 29.8 × 76.2 cm (23.0 × 11.7 × 30.0 in) | manufacturer website |
| Weight | 91.0 kg (200.6 lb) | manufacturer website |
| Usable capacity | 5.12 kWh | Declared by the brand |
| Depth of discharge | 100 % | Declared by the brand |
| Cell chemistry | LFP (lithium iron phosphate) | Declared by the brand |
| Expandable | Yes | Declared by the brand |
| Maximum expanded capacity | 38.4 kWh | Declared by the brand |
| Battery voltage | 204.8 V | Declared by the brand |
| Declared compatible inverters | Sedici marchi nell'elenco ufficiale: Fronius, GoodWe, Viessmann, KOSTAL, SMA, Sungrow, GE, KACO, KACO NH, Ingeteam, Solis, Canadian Solar, Deye, Solplanet, Western CO, Sosen. Per ciascun modello l'elenco dà il numero di moduli ammessi e la versione minima del firmware. | Declared by the brand |
| Rated cycles | 3650 cicli | Declared by the brand |
| Warranty | 10 anni | Declared by the brand |
| Guaranteed throughput | 15.41 MWh | Declared by the brand |
| Guaranteed remaining capacity | 60 % | Declared by the brand |
| Round-trip efficiency | 96 % | Declared by the brand |
| Ingress protection | IP55 | Declared by the brand |
| Mounting | Floor standing | Declared by the brand |
| Minimum temperature | -10 °C | Declared by the brand |
| Maximum temperature | 50 °C | Declared by the brand |
| Works without internet | Fully | Declared by the brand |
| Local control | Local network | Declared by the brand |
| Open protocols | CAN bus | Declared by the brand |
| Remote updates | Can be disabled | Declared by the brand |
| App required for setup | Yes | Declared by the brand |
| Declared standards | CE, UN 38.3, IEC 62619, VDE 2510-50 | Declared by the brand |
| Nominal capacity | — | Not declared |
| Cell supplier | — | Not declared |
| Continuous output | — | Not applicable |
| Phases | — | Not applicable |
| Maximum charge power | — | Not declared |
| Backup power | — | Not applicable |
| Backup phases | — | Not applicable |
| Switchover time | — | Not applicable |
| Black start | — | Not applicable |
| Grid charging | — | Not applicable |
| Dynamic tariffs | — | Not applicable |
| EV charger integration | — | Not applicable |
| Heat pump integration | — | Not applicable |
| Virtual power plant | — | Not applicable |
| Capacity at end of cycle life | — | Not declared |
| Standby consumption | — | Not declared |
| Cell heating | — | Not declared |
| Noise level | — | Not declared |
| Home Assistant integration | — | Not declared |
| Where the data is hosted | — | Not declared |
| Battery passport | — | Not declared |
| Carbon footprint | — | Not declared |
| Recycled content | — | Not declared |
| Grid connection power | — | Not applicable |
| Official list price | — | Not declared |
Which documents this page rests on
- BCU2.0 250918 BYD Battery-Box Premium HVS&HVM Operating Manual V1.2 EN-68cbb20414f24
- BCU2.0 BBOX HVS Datasheet EN V1.0 250328-67ee42d4ced21
- BCU2.0 BYD Battery-Box Premium HVS&HVM Limited Warranty-Europe-EN-V1.0-67eb5bb39ed39
- BCU2.0 250820 BYD Battery Box Premium HVS&HVM Compatible Inverter List V2.21-68a55db3937d7
- EU declaration of conformity HVS-688adf166fe1a
A manual or a datasheet counts as a source even when the original file is hosted elsewhere: what matters is the document, not the server. Where that happens, it is stated above.
02 · The numbers
What it really costs
Battery life cycles
3010 cycles
guaranteed energy throughput
How we worked it out
- stated cycles
- 3650
- warranty years
- 3650
- guaranteed energy throughput
- 3010
Energy density
56.300 Wh/kg
How we worked it out
- usable capacity
- 5.120
- weight
- 91
These numbers are calculated, not stated: they have no source to cite, they have a formula you can redo. The price used is the manufacturer's list price, which is stable and the same in every country — not a shop's price on the day.
03 · Summary
Pros and cons
In favour
- The round-trip efficiency is at least 96%.
- The system is expandable up to a maximum capacity of 38.4 kWh.
- It gets commissioned and works even without a stable internet connection at home: the network is for remote diagnostics and updates.
- It pairs with inverters from different brands: among those officially listed as compatible are Fronius and SMA.
Worth knowing
- The warranty expires at 15.41 MWh of throughput energy or after ten years, whichever comes first: anyone cycling every day can reach the threshold before ten years.
- The system is configured with the app, downloaded to a smartphone.
- The system's usable capacity can vary depending on the brand of inverter it is paired with.
Updates to this sheet and Manufacturer Notes
-
Sheet published