Every battery and every cell of your Pylontech pack — on the device's screen, on your phone, in Home Assistant and in a free online dashboard with 3 years of history. Read-only, installed in two minutes, no subscription.
New · Smart Balance
A Pylontech pack that rarely reaches 100 % slowly drifts apart — and a pack is only as good as its weakest cell. Smart Balance watches every full charge, scores your balance, names the cell that lags and, when it is due, runs a guided two-hour session with your own inverter. Then it shows you the result, cell by cell.
The V2's 1.8″ colour screen shows the essentials at a glance — no phone, no app, no network needed. The Lite does without it and costs less.
Open it on any phone or computer at home: every figure of your battery, live, with nothing to install and nothing leaving your network.
http://<DEVICE-IP> (the IP shown on the TFT screen) or http://pylon-monitor.local in any browser. Live cards refresh every few seconds without ever reloading the page:pwr, bat, stat, info) are round-robined one every 10 seconds — a full data refresh every ~40 seconds — deliberately paced so the battery's console port is never hammered.
Switch on the optional Cloud and follow your whole pack from anywhere: every battery, every cell, 3 years of history and an email if anything goes quiet.
Your inverter sees the stack as one big battery. The Pylon-Monitor reads the Console port, so it shows each battery — and each of its cells — individually.
Every full charge is a balancing window for your BMS. Smart Balance measures each one, gives your pack a balance score, names the weak cell if there is one, and runs a guided session with your inverter when a balance is due.
Ten sensors appear in Home Assistant by themselves, and one JSON endpoint serves everything to Node-RED, Jeedom, Domoticz, openHAB or your own scripts.
GET /api.json returns SOC, SOH, voltage, current, power, state, per-cell voltages, per-battery detail, temperatures, WiFi/MQTT status and more as structured JSON — ready for Home Assistant, Node-RED, Jeedom, Domoticz, openHAB or your own scripts.
Your own thresholds, pushed to your phone — plus the diagnostics a support technician would ask for, one click away.
A captive portal for the WiFi, over-the-air updates for life, and a reset button that always gives you control back.
PylonMonitor-Setup, with its own wildcard DNS so the setup page opens by itself on your phone whatever URL you type. Connect, pick your home WiFi, type the password — done. No app to install, no QR code to scan..bin and upload it through the browser instead. No cables, no soldering, settings preserved either way.
It cannot write to your battery, it works without the internet, and there is nothing in it that wears out.
The three ways to read a Pylontech battery, side by side.
| Pylon-Monitor | Inverter app | PYLON Console on a laptop | |
|---|---|---|---|
| Each battery individually | ✓ | ✗ | ✓ |
| Every cell voltage | ✓ | ✗ | ✓ |
| Always on, no laptop | ✓ | ✓ | ✗ |
| History | 3 years, free | Varies | ✗ |
| Alerts on your phone | ✓ | Varies | ✗ |
| From anywhere | ✓ free Cloud | Often | ✗ |
| Home Assistant / MQTT | ✓ | Varies | ✗ |
| Subscription | None | Usually none | None |
Yes. It reads the Pylontech Console port, which reports each battery individually with every cell voltage in mV, its temperatures, health and cycles — up to 16 batteries on one device.
It is free and optional. The device works fully on your own network; the Cloud adds remote access, 3 years of history and email alerts at no cost, and you can switch it off at any time.
Yes: MQTT auto-discovery creates ten sensors with no YAML, or you can use the REST platform on the JSON API with a snippet the device generates for you.
The low-voltage US and UP series (US2000, US3000, US5000, UP2500, UP5000, Force-L1…) and, since firmware 2.8 on generation 2, high-voltage Force H2 and H48050 packs behind their management unit — in beta: not yet confirmed on a real high-voltage pack.
No. It is read-only: the firmware contains no write command, so it cannot change anything on your batteries or affect their warranty.
Only the screen. Both have the same firmware, dashboard, Cloud, Home Assistant support and API; the V2 adds a 1.8″ colour screen on the box.
Included with every Pylon-Monitor, today. No subscription, no tier, no card. Optional: your device stays fully local if you prefer — switch the Cloud on or off in its settings at any time.
How full your battery will be when the sun goes down — worked out from your own charging pace since this morning.
The time your pack will reach 100 %, updated every minute as the clouds come and go.
How much will be left when the sun comes back up — or when your usual grid charge kicks in.
Both cables included · free updates for life · 2-year warranty · no subscription, ever.
Pylon-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:
Your solar production
Your consumption
Automations
Logbook
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.
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