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Home Assistant BMS Tools Integration

This integration is based on the BMS Tools project by Eric Poulsen: https://gitlab.com/bms-tools/bms-tools

A config flow is available that allows selecting the serial port of the connected BMS and assigning a serial number to connect multiple BMS.
Bluetooth is not supported (yet) by the underlying library.

Installation

Installable via HACS as custom repository (guide).

Currently supported BMS

  • JBD / Overkill Solar

Features

Sensors:

  • Battery voltage
  • Battery current
  • Battery power
  • Battery state of charge (%)
  • Cell voltages
  • Cell balancing status
  • Cycle count
  • Temperature

Controls:

  • Charging switch
  • Discharging switch

Support for Home Assistant Energy Management

Since this feature needs two separate sensors for charge and discharge, two additional sensors are available:

  • Battery charge power
  • Battery discharge power

Steps:

  1. Add two Riemann sum integral sensors by adding this to your configuration.yaml: 
    sensor:
  - platform: integration
    source: sensor.charge_power
    name: Battery Charged Energy
    unit_prefix: k
    round: 2
  - platform: integration
    source: sensor.discharge_power
    name: Battery Discharged Energy
    unit_prefix: k
    round: 2
    See https://www.home-assistant.io/integrations/integration/ for more information.
  2. Restart Home Assistant
  3. Now you can add the two new sensors to the energy dashboard

Note that you have to charge and discharge your battery a little to have the sensors show values, otherwise they will only show Unknown.