A tiny WiFi-connected box that plugs into the Console port of your Pylontech US5000, US3000C or US2000. Truly plug & play: one cable, one USB, one captive portal — under 2 minutes from box to live dashboard. No app, no account, no cloud, no command line. If you can plug in a phone charger, you can install a Pylon-Monitor.
Pylon-Monitor isn't a rebranded factory board. I write the firmware, hand-assemble the PCB, design and 3D-print the enclosure around its 1.8" IPS TFT, and test every single unit myself before it ships.
The WiFi captive portal, the web dashboard and the JSON API are all custom firmware that I write and maintain — the same person who ships your device.
Every board is hand-wired and soldered — ESP8266, level shifter and TFT connector — then flashed and function-tested before it goes in its case.
Designed and printed in-house around the 1.8" IPS TFT, refined over several prototype revisions for a snug fit and proper heat venting.
Designed for solar installers, off-grid enthusiasts and home automation users.
Glance at the box and instantly read State of Charge, voltage, current, SOH and cycle count.
Open http://pylon-monitor.local from any phone or PC on your WiFi. No app, no account.
A clean JSON API at /api.json plugs into Home Assistant in 10 lines of YAML.
On first boot the box creates its own WiFi network. Connect, pick yours, type the password — done.
New features arrive through a friendly web update page. No cables, no soldering, no skills required.
Your battery data never leaves your network. No cloud, no telemetry, no subscription.
Works with the Console (RS-232) port on most Pylontech low-voltage batteries.
Not sure if your model is compatible? Check the FAQ or contact us.
Connect the included RJ45 cable from the Pylon-Monitor to your battery's Console port. Power it with any USB cable.
Open WiFi on your phone, pick PylonMonitor-Setup, then choose your home network and enter its password.
The TFT screen shows the device IP. Type it in your browser — your battery's live data appears instantly.
One HTTP call returns SOC, SOH, voltage, current, power and state — ready to plug into your favourite home automation tool.
/api.jsonrest sensor supportGET http://<DEVICE-IP>/api.json
{
"system": "pylon-monitor",
"firmware": "v1.1",
"summary": {
"soc": 94,
"soh": 96,
"voltage": 48.62,
"current": -7.20,
"power": -350.10,
"state": "Discharge"
}
}No subscriptions. No hidden fees. Lifetime firmware updates included.
Ships from Europe · Tracked delivery · Secure payment
Yes. The device is 100% local. It only needs your WiFi to be accessible from your phone or your Home Assistant instance.
No. The Console port is read-only and meant for monitoring. The Pylon-Monitor never sends commands that change battery behavior.
Yes. The device reads the master battery, which already aggregates data from all slaves in the stack.
Open the dashboard, click Firmware Update, select the .bin file from our firmware page, done.