Daly BMS in Home Assistant

Setup

Enter the MQTT broker in the box settings; Home Assistant creates the MoniWatt for Daly device. No add-on to install beyond your broker.

Sensors

• sensor.daly_monitor_soc, …_voltage, …_current, …_power
• sensor.daly_monitor_cell_01_voltage … per cell
• sensor.daly_monitor_cell_delta
• sensor.daly_monitor_temperature_1 …
• binary_sensor.daly_monitor_charge_mos, …_discharge_mos
• binary_sensor.daly_monitor_fault

Automations

• Notification when the discharge MOSFET opens: the BMS just cut the load, and you want to know why.
• Switch off the inverter output when the pack is under 15%, before the BMS has to.
• Track cell delta weekly to decide when a manual top balance is due.

JSON

GET http://moniwatt.local/api.json?key=YOUR_KEY

{"soc": 66, "voltage": 26.3, "current": -4.2,
 "cells": [3.291, 3.288, 3.294, 3.290, ...], "delta_mv": 6,
 "temps": [18.5], "charge_mos": true, "discharge_mos": true, "faults": []}