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Guides for JBD battery owners

What we have learned reading these systems day after day, written down for owners and installers. No sales pitch, just the things worth knowing.

Start here · 3 min read

JBD smart BMS: from the Bluetooth app to Wi-Fi and Home Assistant

What the JBD Bluetooth app leaves out, the ways to read a JBD BMS remotely, and how to get every cell into Home Assistant.

  • The Bluetooth app is the right tool for settings, not for monitoring: short range, one phone at a time, no history.
  • A wired RS485 link gives a permanent connection that survives walls, distance and a phone left in a pocket.
  • Watch the cell spread at the top of charge, the lowest cell under load and every MOSFET cut.
Read the guide →
3 min readJBD BMS ports: UART, RS485 and CAN, which one for what

UART, RS485 and CAN on JBD boards: what each port does, why they are not interchangeable, and where a Wi-Fi monitor belongs.

Read the guide → 3 min readWhy did my JBD BMS cut the pack? Reading the protections

What a JBD BMS protects against, how to tell which protection tripped, and the usual causes behind each one.

Read the guide →
Hands-on

Try it, click, copy

Interactive pages that answer questions faster than a long article.

The setup, screen by screenWhat you will see on the box and on your phone, in one minute. Your cells, as the box shows themPick a situation and see what the box shows you. Automation generatorYour Home Assistant automation in YAML, written for you. Pick your platformJeedom, Node-RED, openHAB…: the steps and an example to copy. Runtime calculatorHow many hours your batteries last at your consumption. Live demoThe real online dashboard, with simulated readings.
Home Assistant automations

Your appliances run on the sun, by themselves

JBD Monitor tells Home Assistant when the battery fills up and when it runs low. Four simple rules, and the washing machine, the water heater and the car use your sun instead of the grid. Watch a day:

10:00

Your solar production

Your consumption

OverviewLive

Automations

  • Washing machine on the sun
  • The car follows the sun
  • Hot water for free
  • Gentle evening heating

Logbook

    • Solar production
    • House and heating
    • Washing machine
    • Water heater
    • Electric car
    • Battery level
    • From the grid
    • Sold to the grid for little
    Solar used at home0 %
    Bought from the grid0
    Self-sufficiency0 %
    Saved on this day0vs. the same day without automation
    Over a year0if 150 days look like this one
    Try the four rules yourself →

    Simulation of a sunny day for a house with 5 kWp of panels, a 10 kWh battery, a car that needs 10 kWh and a water heater. The energy delivered to each appliance is the same in both scenarios; only the timing changes. Your figures depend on your system, your tariff and the weather.

    A quick question?

    The FAQ answers most of them, with a search box.

    Search the FAQ

    Keep reading

    ◎Features→▤Specifications→⚙Installation→⌂Home Assistant→☁Cloud→⏱Runtime calculator→

    Give your JBD BMS a permanent dashboard

    Order JBD Monitor, shipped on 10 November 2026 and tested on a JBD smart BMS before it leaves.

    Plug & play: working in about a minute

    Pre-order for €49Pre-order price · €59 from 10 Nov · ships on 10 November 2026 · free cancellation until dispatch