BYD Battery-Box Premium HVS / HVM / LVS

Home batteries Basic support

What Franzl can do with this device

Measure live power	—
Meter energy (kWh)	—
Read state of charge (SoC)	✓
Control power	—
Control operating mode	—

This device is integrated read-only: Franzl shows its measurements and includes them in the optimization, but does not actively control it.

How it connects

Franzl uses the Home Assistant custom integration byd_battery_box (installable via HACS). If your device is set up there, Franzl finds it automatically.

Setup

The BYD Battery-Box has no control interface of its own. Charging/discharging always runs through the connected hybrid inverter. First set up the inverter (Fronius GEN24 Hybrid, SMA Tripower X, Kostal Plenticore, or GoodWe ET/EH) as a profile; the BYD battery is controlled through it. Optionally, a HACS integration additionally reads cell diagnostic data directly from the battery control unit (BCU) via Modbus.

Prerequisites

One of the supported hybrid inverters already set up (Fronius GEN24 Hybrid, SMA Tripower X, Kostal Plenticore, GoodWe ET/EH)
Battery and inverter compatibility checked against the BYD compatibility list

What you enter

IP address of the BCU: optional, only for cell diagnostic data (voltages, temperatures) Default: 192.168.16.254, port 502 Note: if the BYD app "Be Connect" is running in parallel, use only one of the two at a time

Device fits? Then nothing stands between you and getting started.

Install Franzl