16 cells on your phone
Each cell voltage live, with the lowest and highest marked and the spread worked out for you.
Pre-order · ships on 10 November 2026
The Pace BMS in your rack battery, on Wi-Fi and anywhere in the world
Many 48 V rack batteries sold under dozens of names run on a Pace board. Pace Monitor reads it over RS485 and keeps every cell in view: at home on your Wi-Fi and, through the free Cloud, from anywhere in the world.
- Plug & play: working in about a minute
- Colour screen + Wi-Fi dashboard
- Home Assistant · JSON · Jeedom
- Free Cloud, no subscription
Secure paymentFree cancellation2-year warrantyShipped from France
≈ 1 minto set up, plug & play
< 0.5 Wpowered by USB-C
0settings written to your battery
€0for the Cloud, forever
Plug & play
Plug it in, it works: about one minute
The box reaches you already set up and checked for your Pace model. You need no app, driver or tool, and your battery settings stay untouched.
- 0:001Plug
The supplied cable goes into the RS485 port of your Pace battery; USB-C into any phone charger.
- 0:152Connect
Join the box’s Wi-Fi from your phone, pick your home network and set a password. No app to install.
- 1:003Watch
Open the dashboard in any browser, add it to Home Assistant, and set your alerts.
- No app to install
- No driver, no PC
- No tools, no soldering
- Nothing changed on your battery
Pre-configured for your model
Pace makes the battery management board found inside a large number of 48 V server-rack batteries, often with another name on the front panel. The usual way to look inside is PbmsTools: a Windows program, a laptop carried to the battery and a serial cable. Few owners do that more than once or twice a year, so the board keeps most of what it knows to itself.
Pace Monitor stays connected to the rack through its RS485 socket and keeps those values in view: on its own colour screen, on a local web dashboard you open from your phone, and in Home Assistant. It only reads, so your settings and the link to the inverter stay as they are.
What you get
SOC and SOH
State of charge, state of health, remaining and full capacity, as calculated by the board.
Temperatures
Cell probes, MOSFET and ambient readings, up to six values depending on the board.
Warnings in plain words
Warnings, protections and faults decoded into text, with the time they appeared.
Home Assistant
MQTT auto-discovery creates the sensors; a local JSON API serves Jeedom, Node-RED and the rest.
No laptop, no writes
Your phone replaces the trip with a laptop for daily checks; nothing is written to the BMS.
Made for the way you use your Pace
DIY pack builders
Every cell and the balancing, to check your build and catch a weak cell early.
Off-grid, van or boat
No internet? Local Wi-Fi is enough. Internet available? The Cloud adds remote viewing.
A smart home
Home Assistant or Jeedom receive every value in about a minute; your automations do the rest.
Installers
Follow your customers’ systems with your own Cloud access, without asking for their passwords.
A rack battery, followed day after day
The chart follows power and state of charge hour by hour. Beside it, the cell spread tells you whether the balancing keeps up at the end of each charge, and the temperatures show how the rack lives through a hot afternoon or a cold night.
With the free Cloud, follow the rack from anywhere in the world, compare weeks and export CSV files.
Live dashboardLive
SOC82%
Power-416W
Cell Δ12mV
ChargeDischargeState of charge
Try it
Your cells, as the box shows them
Pick a situation: this is what Pace Monitor shows you about each cell of your Pace pack. Values simulated.
Lowest
Highest
Gap
Temperature
Live demo
See your dashboard before it arrives
What you see is the production dashboard, running on a simulated Pace battery. Explore freely: no account, no download.
- Health check in plain wordsGreen, amber or red for each point, with the reason.
- Every pack, every cellSpread, temperatures and balance at a glance.
- Your battery’s dayStored, given back, time left at the current pace.
- Up to 3 years of curvesZoom on any day, export everything as CSV.
Cloud Access · 100% Free
Cloud Access · 100% Free: your battery, live, from anywhere
A rack battery usually lives in a garage or a technical room, far from where you spend your day. The free Cloud shows its cells, its state of health and its warnings from wherever you are, without carrying a laptop down there.
Live dashboard from anywhere
Every value and every cell, refreshed on their own, on your phone.
Up to 3 years of history
Charge, kWh in and out, temperatures, cell spread, day by day.
An e-mail if it goes quiet
Six hours without news from your box and we tell you.
Public JSON link
Home Assistant, Node-RED, a widget… no port forwarding, no VPN.
CSV export
Everything stored, ready for your spreadsheet.
Installer access
Your installer gets a view of the system without your password, and your access stays yours.
€0per month, per year, forever
Optional: your box stays fully local if you prefer. Switch the Cloud on or off in its settings at any time.
How the free Cloud works →Your Pace BMS in Home Assistant, Jeedom and Node-RED
Cell voltages, state of health, temperatures and warnings become sensors, so your automations can react long before anyone would have opened PbmsTools.
Home AssistantMQTT auto-discovery, no YAML
MQTTReadings published on your broker
JSON APIGET /api.json on your network
JeedomJSON plugin
Node-REDhttp request node
DomoticzHTTP/JSON polling
openHABHTTP binding
IFTTT · MakeThrough the free Cloud JSON link
Ideas people set up first
Warnings, in words
When binary_sensor.pace_monitor_warning turns on, a notification gives you the text of the warning and the highest cell at that moment.
Shed load in time
If the rack falls under 15%, the dryer and the oven are switched off on smart plugs before the board has to protect itself.
Surplus to the water heater
When the rack is above 95% and still charging, the water heater is switched on so the sun is not wasted.
A hot room
When sensor.pace_monitor_temperature_1 passes 35 °C, a fan in the battery room is switched on and you get a note.
Plug & play
In Home Assistant in about a minute
Type the address of Home Assistant in the box, a user and its password: that’s it. The Pace Monitor device and all its sensors appear on their own, ready for your dashboards and the Energy page.
- No YAML, no HACS, no ESPHome
- 100 % local, works without internet
- Also JSON API, Jeedom, Node-RED, Domoticz
EnergyPace Monitor
SOC
78 %Cell 01 voltage3.312 V
Cell delta9 mV
Temperature 124.5 °C
Cycles142
Last 24 hours
00:0006:0012:0018:0024:00
SOC
Made for Pace
| Models | Pace BMS boards (P16S100A, P16S200A) in 48 V rack batteries |
|---|---|
| Connection | RS485 port, RJ45 cable included |
| Your existing wiring | Untouched: the box reads, it never writes |
| Network | Your home Wi-Fi (2.4 GHz); works without internet |
| Integrations | Home Assistant (MQTT auto-discovery), JSON API, Jeedom, Node-RED, Domoticz, openHAB |
| Cloud | Free and optional: live dashboard, 3 years of history, CSV |
| Power | USB-C, under 0.5 W |
A different Pace model? Mention it in your order and we prepare and test the box for it.
One RJ45 cable, on the socket next to CAN
The box plugs into the RS485 socket of the rack, usually next to the CAN socket, and takes its power from any USB charger. The link sockets between packs and the inverter cable are not touched.
The design is that of Pylon-Monitor, which already watches Pylontech batteries, with an RS485 / CAN board and firmware written for the Pace protocol.
Designed and assembled in France
Prepared and tested in France, box by box, by the same team that builds Pylon-Monitor for Pylontech batteries.
Questions before buying? Write to [email protected]: a person answers.
From your order to your first reading
- TodayYou pre-order at €49
Payment confirmed by e-mail, with your reference.
- Before dispatchWe prepare your box
We set it up for your Pace battery and test it before it leaves.
- 10 NovDispatch with tracking
The tracking link reaches you by e-mail that very day.
- 2 to 10 days laterPlugged in, in about a minute
Plug the cable, power by USB-C, choose your Wi-Fi: the readings show up.
Pace Monitor
€49.00
Pre-order price until 9 November 2026 · €59 afterwards
Shipping calculated at checkout
- Pace Monitor with colour screen and RS485 / CAN interface
- RJ45 communication cable
- USB-C cable
- Free Cloud Access, no subscription
Ships on 10 November 2026 · free cancellation until dispatch
- Secure paymentCard by Stripe
- Free cancellationUntil dispatch, 100% refunded
- 14-day returnsAfter delivery
- 2-year warrantyPlus 30 days if your model is not supported
- Shipped from FrancePrepared and tested before it leaves
Pace BMS app, Wi-Fi dongle or Pace Monitor?
What each option really gives you, in short.
| Bluetooth app | Wi-Fi dongle and maker’s cloud | Pace Monitor | |
|---|---|---|---|
| Readable from anywhere in the world | — | ✓ | ✓ |
| Keeps working without internet | ✓ | — | ✓ |
| Home Assistant sensors without ESP32 or YAML | — | — | ✓ |
| A screen next to the equipment | — | — | ✓ |
| Never changes a setting | — | — | ✓ |
Pace Monitor at a glance
- Reads
- Pace BMS boards, such as P16S100A and P16S200A, in 48 V rack batteries
- Port used
- The RS485 RJ45 socket, usually next to CAN
- Data
- 16 cells, SOC, SOH, cycles, temperatures, balancing, warnings and protections
- Several packs
- Chains of packs on firmware that reports them: tell us how many you have
- Where you see it
- Screen on the box, home Wi-Fi, Home Assistant, free Cloud
- Price
- €49, cable included, ships from France
See what the Pace board inside your rack knows
Order Pace Monitor, shipped on 10 November 2026 and tested on a Pace 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