Smart Battery Monitor: The Heartbeat of Your Off-Grid Power Supply

The ultimate guardian of your energy reserves. Our Smart Battery Monitor provides a crystal-clear, real-time insight into the exact status of your auxiliary battery. No more guesswork based on fluctuating voltage, but an ultra-precise measurement of every single amp entering or leaving your battery. Connected to the SystemBus, this module forms the perfect bridge to Home Assistant, allowing you to instantly read the remaining capacity, current load, and overall health of your battery bank. The indispensable foundation for carefree off-grid travel.

  • 16-bit ADS1115 Analog-to-Digital Converter: The module is equipped with a dedicated, external measurement chip. By performing differential measurements across the shunt at the highest sensitivity setting, the hardware registers even the smallest current fluctuations in millivolts with extreme precision.
  • Integrated NTC Temperature Port: Features a direct connection for a temperature sensor on the battery terminal. This is essential for Lithium batteries (to protect against charging below freezing temperatures) and for monitoring overall battery health.
  • Central SystemBus Integration (No Cluttered Connections): The battery monitor transmits all of its complex data (such as SoC, current, and temperature) digitally over the central SystemBus. This eliminates the need for separate, interference-prone data cables or extra Bluetooth modules in your camper that constantly consume standby power. One central bus for your entire network keeps the installation clean, reliable, and extremely energy-efficient — where every single amp counts.

Technical specifications.

Powersupply8-15V DC
Power1mA
Bus-voltage12V DC
CommunicationI2C
Dimensions (LxWxH)60x40x15mm
VariantsAvailable as kit or digital file

controls
  • input_number.battery_capacity
  • input_number.charge_efficiency
  • input_number.charged_voltage
  • input_number.discharge_floor
  • input_number.set_manual_soc
  • button.sync_state_of_charge
  • input_number.tail_current
Sensors
  • sensor.battery_state_of_charge
  • sensor.battery_current
  • sensor.battery_power
  • sensor.battery_temperature
  • sensor.battery_voltage
  • sensor.time_to_discharge
buy now

Others also watched:

Master Unit


solar module


room monitor