Designed & made in France

🚚 Exceptional order volume since 1 September — allow 3 to 5 days between your order and its dispatch. We are shipping as fast as we can. ✅ Orders up to September 6: shipped. 🔄 Orders placed since September 7: currently being processed.Ordered → dispatched: ⏳ Sept 8-12 → Sept 15 · ⏳ Sept 13 → Sept 16

🎉 New: meet Pylon-Monitor Lite — the same WiFi monitoring firmware as Pylon-Monitor V2, without the physical screen. €39, same JSON API, same Home Assistant integration. Discover Pylon-Monitor Lite →

🎉 New feature: the USB Recovery Flasher — get your Pylon-Monitor working again over a USB cable when it can't be reached over WiFi any more, straight from your browser, no software to install. Try it →

Visual Tour · Live in < 2 min

Every screen, in one scroll.

No marketing fluff. These are the real pages served by your Pylon-Monitor — the same monitoring, diagnostics and Home Assistant integration screens — at http://pylon-monitor.local, exactly what you'll see the moment you plug it in. And that moment is under 2 minutes after opening the box.

Pylontech master battery panel: the RJ45 cable in the CONSOLE port feeds the Pylon-Monitor, while the stack link cable leaves LINK PORT 1 towards the slave battery — On the master battery: CONSOLE goes to the Pylon-Monitor, LINK PORT 1 goes to the slave battery.

The mistake almost everyone makes: LINK PORT 1, not LINK PORT 0
The cable that chains your master battery to the first slave must leave LINK PORT 1 on the master — never LINK PORT 0. It plugs into LINK PORT 0 on the slave, and every further battery repeats the same 1 → 0 pattern. Wired the other way round the master never sees the rest of the stack, so Pylon-Monitor reports a single battery no matter how many you own.

PHYSICAL SCREEN

Built-in TFT display

A crisp 1.8" IPS TFT panel shows the State of Charge in giant digits, with voltage and current beside it and SOH and cycle count below — readable across the room, no phone required.

Pylon-Monitor 1.8" IPS TFT screen showing live Pylontech battery data — 59% charge, voltage, current and power

1.8" IPS TFT — full color, real photo

No fan, no buttons to fiddle with — just glance at the box.

FIRST BOOT

Captive portal WiFi setup

On first power-on, the Pylon-Monitor creates its own network PylonMonitor-Setup. Connect from any phone, the setup page opens by itself.

No app to install, no QR code
Scans surrounding networks automatically
Saves credentials and reboots — done
Reopens after a Factory Reset — or 2 quick taps in a row on the reset button (back of the enclosure) if you just need to switch WiFi networks, without wiping anything else

Set up your Pylon-Monitor ×

Pylon-Monitor captive portal setup page — choose your home WiFi network and enter its password

AUTH — OPTIONAL

Login screen — off by default, yours to enable

Out of the box, anyone on your network can open the dashboard with zero friction — no login screen in the way. If the device is reachable beyond your LAN (port-forwarded, VPN…), flip one checkbox in Settings to require this username/password screen, shown here.

Off by default — on if and when you want it
Real random session cookie, HTTP-only, never leaves your LAN
Passwords are never sent back to the browser once saved
No telemetry, no remote access, no account server

MAIN PAGE

Live battery dashboard

The home screen of the device. Live cards for Charge, Health, Temperatures, System and Cells, plus a 24h history graph — and one nav strip to jump anywhere in two clicks.

SOC, voltage, current, power, state in real time
SOH, cycles, cell imbalance, WiFi signal, MQTT status
Base & MOSFET temperatures, per-cell voltages
Up to 16 batteries chained together (e.g. 16× US5000 ≈ 76.8 kWh, or a mix like US2000 + US3000 + US5000) — a selector switches between "all combined" and any single battery
One-click jump to JSON, Settings, Screen Display, Update, Reboot, Reset

Pylon-Monitor ×

CUSTOMIZE

Screen Display — your TFT, your layout

The physical screen's percentage is always shown, but everything else around it is up to you. Three quick presets, or tick elements individually — the live preview updates instantly, save, and the real screen matches it exactly within seconds.

Header title, voltage/current/power, charge gauge
Charging/Discharging state, SOH, cycle count, temperature
IP address and/or hostname.local footer
Fewer elements ticked? The layout re-centers itself instead of leaving empty space

Screen Display — Pylon-Monitor ×

Pylon-Monitor Screen Display settings page — live preview and checkboxes to customize what the physical TFT screen shows

Just the essentials

Minimal — gauge only

Settings — Pylon-Monitor ×

Pylon-Monitor Settings page — device name, sign-in toggle and Home Assistant MQTT setup

CONFIG

One settings page — everything inside

Hostname, login, static IP, MQTT broker, REST API helper and Pushover emergency notifications. All in one form, with inline hints that show your current IP and copy-paste-ready YAML.

mDNS hostname → http://yourname.local
Static IP or DHCP reservation guidance
MQTT auto-discovery for Home Assistant
Ready-made REST YAML block (with your IP injected)
Optional Pushover push for low SOC alerts

Network — Pylon-Monitor ×

Pylon-Monitor Network diagnostics page — connection details, gateway reachability test and WiFi signal strength graph

Settings — Pylon-Monitor ×

Pylon-Monitor Settings — Alarms card with SOC and temperature thresholds, Pushover credentials and a test notification button

Alarms — set thresholds, add Pushover, test with one click

DIAGNOSTICS

See exactly what the device is doing

No serial monitor, no guesswork. Three pages cover troubleshooting end to end, plus configurable alerts so problems reach your phone before you go looking for them.

Event log — recent activity, plus a boot history that survives crashes (kept in RTC memory, not lost on reset)
Raw data — the battery console's unparsed replies, for confirming the exact wire format
Network — WiFi signal history and a one-click gateway reachability test
Alarms — your own SOC/temperature thresholds with hysteresis, pushed via Pushover, with a one-click test

AWAY FROM HOME

A public link that works from anywhere too

The dashboard and /api.json above are LAN-only by design. Want to check your battery from the office or on a trip as well? Flip one checkbox in Settings to publish it to the cloud, for free, at a private link secured by your own access key — no VPN, no port forwarding, no dynamic DNS.

One checkbox in Settings, off by default — the device stays fully local otherwise
The same random access key that already protects /api.json from outside your LAN becomes the URL's token
Refreshed roughly every 2 minutes — not built for a live dashboard, but plenty for a phone check from the office or on the road
Turn the checkbox back off and the pushes — and the public URL — stop immediately

Settings — Pylon-Monitor ×

Pylon-Monitor Settings page — Public JSON access panel with an access key and a real public URL for viewing the battery away from home

OTA UPDATE

Firmware update — from your browser

Download the .bin from the firmware page and upload it from your dashboard — it reboots straight into the new version. No cables, no soldering, no Arduino IDE. Your settings are preserved across updates.

Download the latest .bin for free from the firmware page
Upload it from the dashboard's Update firmware page — no serial cable, no Arduino IDE
Update takes ~20–30 seconds
Hostname, MQTT, static IP, login all preserved
Previous firmware kept until the new one is fully written — a power loss mid-upload can't brick it

Firmware Update — Pylon-Monitor ×

Pylon-Monitor Firmware update page — choose the .bin file and click Install firmware

api.json — Pylon-Monitor ×

Pylon-Monitor /api.json real response — full Pylontech battery state as structured JSON

INTEGRATION

One JSON endpoint. Every tool speaks it.

GET /api.json hands back the entire device state in one plain HTTP call — charge, health, temperatures, per-cell voltages, network status, alarms. No auth, no SDK, no vendor lock-in: it's just JSON, so anything that can make an HTTP request can use it.

Best integration

Home Assistant

Built into the firmware, both ways: MQTT auto-discovery gives you 10 sensors with zero YAML, or point the native rest platform at /api.json for 6 sensors with a YAML block the device generates for you.

Jeedom

Install the JSON plugin, point an equipment at /api.json, map paths like summary>soc or net>rssi to commands. No custom plugin needed.

Also works out of the box with Node-RED, Domoticz, openHAB, Grafana/InfluxDB — anything that parses JSON over HTTP
Refreshed live every ~4 seconds on the dashboard, all on your LAN
Stable structure — won't break between firmware versions

MAINTENANCE

Reboot & Factory Reset

Reboot is one click away in the navigation strip, with a confirmation dialog first. Factory Reset lives inside Settings' Danger zone — it wipes WiFi credentials, MQTT, alarms and sign-in, then reopens the captive portal so you can start fresh.

Confirmation dialog before either destructive action
Old firmware/settings only touched once the action is confirmed
2 quick taps in a row on the reset button (back of the enclosure) reopens the portal too — without wiping anything, for a quick WiFi change
Settings stay preserved across firmware updates

Factory reset — Pylon-Monitor ×

Pylon-Monitor Settings — Danger zone with the Factory reset button

That's the whole device.

One small box, one captive portal, one dashboard, one JSON endpoint, one update button. No cloud, no app, no subscription — €59 once.

Order now — €59 Quick Start in 2 min