Questions from our customers

Monitoring more than 4 chained batteries (US3000C master + 4× US2000C)

Question received

Our answer

Thank you for your message and your interest in our product. Thanks to your question, we've updated the documentation on our website.

To answer your question about a setup with a US3000C master and 4 US2000C slaves (5 units total): no error will appear. All 5 batteries show up (Battery 1 through 5) with all their individual data. The firmware actually supports up to 16 units at the battery level (MAX_BAT_UNITS=16), not just 4 as the website previously stated.

The only limitation concerns the per-cell voltage detail view. The cellVoltages[64] table is capped at 64 readings total, which is roughly 4 full 15-cell units. So battery 5 keeps all its overall data (SOC, V, A, W, SOH, cycles, temperature), but the "Cells" tab only shows 4 of its 15 cells.

Below is an example JSON file for a 2-battery setup:

{
  "system": "pylon-monitor",
  "firmware": "2.0",
  "demo": false,
  "uptime": 308,
  "battery_link": true,
  "summary": {
    "soc": 42,
    "voltage": 49.05,
    "current": -16.12,
    "power": -790.69,
    "state": "Discharging",
    "units": 2
  },
  "health": {
    "soh": 98,
    "cycles": 619,
    "charge_cnt": 0,
    "discharge_cnt": 14739
  },
  "temps": {
    "battery": 30.7,
    "mosfet": 30.7,
    "low": 28.4,
    "high": 29.9
  },
  "cells": {
    "count": 30,
    "min": 3269,
    "max": 3271,
    "delta": 2,
    "units": 2,
    "mv": [3270, 3270, 3270, 3270, 3270, 3270, 3270, 3270, 3270, 3269, 3270, 3270, 3270, 3270, 3270, 3271, 3270, 3270, 3270, 3270, 3271, 3270, 3271, 3271, 3270, 3270, 3270, 3269, 3270, 3270]
  },
  "unitsDetail": [
    {
      "label": "Battery 1",
      "voltage": 49.05,
      "current": -7.78,
      "power": -381.4,
      "soc": 42,
      "soh": 0,
      "cycles": 0,
      "charge_cnt": 0,
      "discharge_cnt": 7332,
      "state": "Discharging",
      "temps": { "battery": 30.6, "mosfet": 30.2, "low": 28.4, "high": 29.6 }
    },
    {
      "label": "Battery 2",
      "voltage": 49.05,
      "current": -8.34,
      "power": -409.3,
      "soc": 41,
      "soh": 98,
      "cycles": 619,
      "charge_cnt": 0,
      "discharge_cnt": 7407,
      "state": "Discharging",
      "temps": { "battery": 30.8, "mosfet": 30.7, "low": 28.9, "high": 29.9 }
    }
  ],
  "net": {
    "ip": "192.168.0.237",
    "rssi": -49,
    "quality": "good",
    "mqtt": "not configured",
    "heap": 13784,
    "gateway": "192.168.0.1",
    "subnet": "255.255.255.0",
    "dns": "192.168.0.112",
    "mac": "AA:BB:CC:DD:EE:01"
  },
  "alarms": { "soc": 15, "temp": 40 }
}

Happy to help with any further questions.

Pylon-Monitor · Pylon-Monitor.com

SmartLife / Tuya integration

Question received

Our answer

Thank you for your order, your message, and your kind words about the Pylon-Monitor — we really appreciate it.

To answer your two questions directly: a native SmartLife integration isn't something we can realistically build on our side in the short term. The Tuya/SmartLife ecosystem is closed: for a device to appear in the app, it must either embed a certified Tuya WiFi module or go through the Tuya IoT platform (developer account, review, certification fees) — there's no open gateway for exposing a third-party sensor the way MQTT/Home Assistant allows.

The good news is that Home Assistant remains the simplest bridge between the two worlds. If you're already using SmartLife for your other equipment, you can:

1. Install Home Assistant (a Raspberry Pi, a NAS, or even a simple Docker container) — you don't need to use it as your main interface, it can just run in the background as a data hub.

2. Bring your SmartLife devices into Home Assistant via the official Tuya integration (free developer account) — plenty of tutorials exist online.

3. The Pylon-Monitor shows up there natively over MQTT (auto-discovery, zero YAML), right next to your Tuya devices, all in one dashboard.

It's a bit more setup than having everything directly in SmartLife, but today it's the only reliable technical way to bring Pylontech and Tuya together in one place. We're keeping your suggestion on file: if Tuya ever opens a generic gateway for third-party sensors (the way it does for Google Home or Alexa), we'll seriously look at implementing it.

Feel free to reach out with any other questions — and thanks again for your order!

Pylon-Monitor · Pylon-Monitor.com