The sockets on the back of a Pylontech
| Socket | What it is for |
|---|---|
| CAN / RS485 | Communication with the inverter: state of charge, charge and discharge limits, alarms. Leave it as your installer set it up. |
| LINK 0 / LINK 1 | Communication between the batteries of a stack. The master gathers what the others report. |
| CONSOLE | The service port: a text interface to the BMS, used by Pylontech's own service tools. This is the one readers such as PylonCheck use. |
Exact labels vary slightly between models (US2000, US2000C, US3000C, US5000, UP2500, Force L1), but the three roles are the same.
What the CONSOLE port gives you
- Stack power data: voltage, current, state of charge, state
- Per-battery data for every module the master can see
- Every cell voltage, cell temperatures, BMS temperature
- State of Health, cycle count, remaining capacity
- Warning and protection flags
In other words: everything you need for Pylontech diagnostics, far beyond the summary the inverter receives.
Which battery, in a stack?
Use the CONSOLE port of the master battery — the one connected to the inverter, usually at the top of the stack. It reports for all the modules linked to it. The other batteries' CONSOLE ports stay free.
Is it safe to use?
Yes, for reading. The CONSOLE port is independent of the inverter link, so plugging a reader in does not disturb charging or discharging, and it can be done with the system running. What matters is what the reader sends: PylonCheck only sends read commands, gently paced (one every 10 seconds), and never writes to the BMS.
Which cable?
The CONSOLE port uses an RJ45 connector, but it is not an Ethernet port, and a standard network cable is not the right cable. PylonCheck ships with its own labelled console cable: the end marked BAT goes into the CONSOLE port, the other into the box. Nothing to build, nothing to crimp.
From CONSOLE port to your phone
PylonCheck reads the CONSOLE port continuously, shows the result on a local web page and pushes a snapshot to your cloud dashboard every two minutes — so you can see your Pylontech battery from anywhere in the world. Setup takes about five minutes: see the installation guide.