High voltage
FoxESS
EQ Battery (EQ4800 / EQ6000 Plus)
BYD Battery-Box Premium HVS 7.7
High voltage
F3 · Flat-sized (3–8 kWh)
BYD BYD Battery-Box Premium HVS 7.7
Price
Not available
JouleSpecs does not sell and does not show shop prices: check the price where you buy.
Data from official source
The BYD Battery-Box Premium HVS 7.7 is a high-voltage storage unit with lithium iron phosphate (LiFePO4) cells and 7.68 kWh of usable energy. It stands on the floor and communicates with the inverter by cable; the inverter must be chosen from the official list.
The warranty lasts ten years or up to 23.12 MWh of throughput energy, whichever comes first.
01 · Verified data
Technical specifications
Usable capacity
7.68 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 × 99.5 cm (23.0 × 11.7 × 39.2 in) | manufacturer website |
| Weight | 129.0 kg (284.4 lb) | manufacturer website |
| Usable capacity | 7.68 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 | 307.2 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 | 23.12 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
59.500 Wh/kg
How we worked it out
- usable capacity
- 7.680
- weight
- 129
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
- It can be expanded at any time by adding modules, up to 38.4 kWh.
- The charge-discharge efficiency is at least 96%.
- The official list of compatible inverters includes sixteen brands, among them Kostal and Sungrow.
- An internet connection is not mandatory, but it is recommended.
Worth knowing
- The warranty ends at 23.12 MWh of throughput energy or after ten years, whichever comes first: anyone who charges and discharges the battery every day can reach the cap sooner.
- The inverter must come from the official list, which sets allowed modules and minimum firmware per model: anyone with an existing inverter must check it fits.
- The system is configured through an app downloaded to a smartphone.
Updates to this sheet and Manufacturer Notes
-
Sheet published