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.