Pre-order €49 until 9 Nov, then €5911 days left at this priceships on 10 November 2026Pre-order →

Home / Your JBD pack, from anywhere

Cloud Access · 100% Free

Your JBD pack, from anywhere

At home, in a van or in a shed at the bottom of the garden: the free Cloud puts the pack on your phone wherever you are.

  • €0for the Cloud, forever
  • 3 yearsof history, CSV export
  • ≈ 2 minbetween two readings

Open the live demo Sign in →

How it works

From your box to your phone, wherever you are

The box sends its readings out, encrypted. Nothing comes in: no port to open on your router, no VPN, no dynamic DNS.

Your JBD batteryread every few seconds
RS485
JBD Monitorat home, on your Wi-Fi
HTTPS · ≈ 2 min
The free Cloudhistory, alerts, sharing
anywhere
Your phone or PCany browser, no app
Switch it on

Three steps, two minutes

Off by default. Here is all it takes, with the real screens.

  1. 1Tick one box

    On the box’s page, Settings › Access key & Cloud: tick “Send readings to the free Cloud” and save. Copy the access key shown above it.

    Access key & Cloud

    Access key

    K7Q2M9XA41

    ✓Send readings to the free Cloud (jbd-monitor.com)

    Save
  2. 2Sign in with your e-mail

    On jbd-monitor.com/dashboard, type your e-mail: you get a one-time sign-in link. No password to remember.

    Sign in

    [email protected]Send me a sign-in link
  3. 3Link your box

    Paste the access key, give the box a name, done. The first readings appear within two minutes.

    Link your first box

    Access key

    K7Q2M9XA41

    Name

    GarageLink this box
Included

Everything, for free

Live dashboard from anywhereCharge, power, every cell and temperature, with the day so far.
Up to 3 years of historyZoom on any day, compare seasons, read the trend.
CSV exportEverything stored, ready for your spreadsheet.
E-mail alertsCharge, temperature, alarms, a box that goes silent: one e-mail per event.
Installer accessYour installer follows the system with their own access; you keep yours.
Private JSON linkFor a widget, IFTTT or Make: your live values, without opening anything at home.
Alerts

You choose what deserves an e-mail

Set per box in your account. One e-mail per event, then nothing until the value is back to normal. In your profile, one more: an e-mail if a box stays silent for 6 hours.

Examples of alerts →

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.

    Your data stays yours

    In detail

    The Cloud for JBD owners

    What you see online

    The online dashboard shows what JBD Monitor reads: state of charge, pack voltage, current and power, every cell voltage with the spread, the temperature probes, the cycle count, the charge and discharge MOS state and any protection reported by the BMS. It refreshes about every two minutes, without port forwarding, VPN or dynamic DNS.

    JBD boards come in many sizes; the dashboard simply shows the cells your board reports, from 4S to 24S.

    Switching it on

    1. On the local dashboard at http://moniwatt.local, open Settings > Access key & Cloud.
    2. Tick the option, save, and copy the access key.
    3. Sign in to the Cloud dashboard of this site with your e-mail and paste the key.

    In a vehicle, the box only needs a Wi-Fi network with internet, such as a mobile router. Readings appear within two minutes.

    A record of the pack

    Up to three years of history show how the pack lives: the deepest discharges, the cell spread at the end of each charge, the temperatures in winter. Export any period as CSV.

    An e-mail if it goes quiet

    When the box has sent nothing for six hours, one e-mail tells you. A tripped socket or a router that lost power is the usual reason. Nothing more until the box is back.

    Installer access

    If someone built or maintains the pack for you, they can add it to their own account with the access key you share. You keep your own access and can change the key at any time.

    Off by default, free when on

    No subscription. Readings travel encrypted to a private link opened only by your key. Untick the option and sending stops at once; stored readings are deleted on request. Without the Cloud, the box keeps working on your network as before.

    Questions about the Cloud

    Is the Cloud really free?

    Yes, with no subscription and no paid tier: live dashboard, 3 years of history, CSV export and e-mail alerts are included with the box.

    Do I need a password?

    No. You sign in with your e-mail: we send you a one-time link. Your box is linked to your account with its access key.

    What happens if the internet goes down?

    The screen, the local dashboard and Home Assistant keep working at home. The Cloud picks up again as soon as the connection is back, and can e-mail you if the box stays silent for 6 hours.

    Can someone else follow my system?

    Yes. Your installer, or anyone you give the access key to, can link the box to their own account. You can change the key whenever you like.

    Can I switch it off and delete my data?

    Untick the option in the box settings and it stops sending at once. Stored readings are deleted on request, with one e-mail.

    All questions →

    Keep reading

    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