This is the second generation of the EPsolar Tracer solar charge controller. You need RS-485 adapter for communication. The first generation controller used RS-232 and a different protocol. see https://github.com/xxv/tracer.
Check EPEVER site for more info and Windows software. There are also some nice pictures on Tumblr.
In directory there is a Linux driver for Exar based USB RS-485 adapter. The original source was from Exar website, but it has dissapeared when MaxLinear acquired Exar.
Protocol See for windows capture for some extra commands.
Uses modbus library (https://github.com/bashwork/pymodbus)
Example output
# python info.py
Manufacturer: 'EPsolar Tech co., Ltd'
Model: 'Tracer2215BN'
Version: 'V02.05+V07.12'
Charging equipment rated input voltage = 150.0V
Charging equipment rated input voltage = 150.0V
Charging equipment rated input current = 20.0A
...
Epsolar controller uses RJ45 connector. If you use other RS-485 adapter than Exar, you may create the cable from an Ethernet cable. Check the colors from the following tables, your cable is typically T768B or T768A.
- Connect brown wire to adapter pin marked as GND if your adapter has the pin.
- Connect blue wire to the adapter pin marked as B or D-
- T768A: Connect orange wire to adapter pin marked as A or D+ OR
- T768B: Connect green wire to adapter pin marked as A or D+ .
The other pins are used by MT-50 display and not needed with USB adapter.
| Pin | Function | Wire | Eth. T768A | Eth. T768B |
|---|---|---|---|---|
| 1 | Power | White-Green | White-Orange | |
| 2 | Power | Green | Orange | |
| 3 | RS-485-B | White-Orange | White-Green | |
| 4 | RS-485-B | D - | Blue | Blue |
| 5 | RS-485-A | White-Blue | White-Blue | |
| 6 | RS-485-A | D + | Orange | Green |
| 7 | Ground | White-Brown | White-Brown | |
| 8 | Ground | GND | Brown | Brown |
