Felicity Solar battery in Home Assistant

Getting the sensors

Enter your MQTT broker details in MoniWatt for Felicity and save. Home Assistant picks up the discovery messages and creates the device with its sensors.

• sensor.felicity_monitor_soc
• sensor.felicity_monitor_power, …_voltage, …_current
• sensor.felicity_monitor_cell_delta and one sensor per cell
• sensor.felicity_monitor_temperature
• binary_sensor.felicity_monitor_alarm

Automations people build

• Run the water pump or the air conditioner on solar surplus when the battery is above 90%.
• During a grid outage, warn the household when the battery drops under 30%.
• Alert when the battery temperature exceeds 40 °C in a closed technical room.
• Log daily energy charged and discharged in the Energy dashboard.

JSON API

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

{
  "soc": 72, "voltage": 52.6, "current": -9.8, "power": -515,
  "cells": [3.287, 3.290, 3.285, ...], "delta_mv": 8,
  "temp": 29.5, "cycles": 143, "alarms": []
}

Usable from Node-RED, Domoticz, Jeedom, openHAB or a cron script.