renogymodbus

This package is intended to help you communicate with a Renogy charge controller. It has been tested with a Renogy Rover Elite but should work with other Renogy devices.

Features

• Read real time data
• Automatic retries

Connecting to the charge controller or battery

This library has been tested with the following devices:

• Renogy Rover Elite 20A MPPT Solar Charge Controller
• Renogy 12V 100Ah Smart Lithium Iron Phosphate Battery

The library should work with other Renogy devices, please raise an issue if you have problems or have tested that the library works with your device.

Please check whether your charge controller or battery has a rs232 or rs485 port.

rs485

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• rs485 to USB serial cable (UK) https://uk.renogy.com/rs485-to-usb-serial-cable/
• rs485 to USB serial cable (US) https://renogy.com/rs485-to-usb-serial-cable/

rs232

Unfortunately the rs232 to USB serial cable has been discontinued by Renogy. It is possible to make your own.

Installing the package

To install the package run

pip install renogymodbus

This package requires Python 3, depending on your setup you might have to instead run:

pip3 install renogymodbus

Command line utility

To run the command line utility and see the debug output run the following on the command line:

usage: renogymodbus [-h] [--portname PORTNAME] [--slaveaddress SLAVEADDRESS]
                   [--device {charge_controller,smart_battery}]
                   [--find-slave-address]

optional arguments:
  -h, --help            show this help message and exit
  --portname PORTNAME   Port name for example /dev/ttyUSB0
  --slaveaddress SLAVEADDRESS
                        Slave address 1-247
  --device {charge_controller,smart_battery}
                        Device to read data from. Either charge_controller or
                        smart_battery
  --find-slave-address  Find slave address of modbus device

Example commands:

renogymodbus --device smart_battery --portname /dev/ttyUSB0 --slaveaddress 48

renogymodbus --device charge_controller --portname /dev/ttyUSB0 --slaveaddress 1

renogymodbus --find-slave-address --portname /dev/ttyUSB0

Example output for charge controller

Real Time Charge Controller Data
Solar voltage: 43.1V
Solar current: 0.09A
Solar power: 4W
Load voltage: 0.0V
Load current: 0.0A
Load power: 0W
Battery voltage: 13.9V
Battery state of charge: 100%
Battery temperature: -37°C
Controller temperature: 48°C
Maximum solar power today: 51W
Minimum solar power today: 0W
Maximum battery voltage today: 14.0V
Minimum battery voltage today: 13.1V

Example output for smart battery

Real Time Smart Battery Data
Cell voltages: [3.3, 3.3, 3.3, 3.3, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0]V
Cell temperatures: [24.0, 24.0, 24.0, 24.0, 1835.2, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0]°C
BMS temperature: 0.0°C
Environment temperatures: [25.0, 25.0]°C
Heater temperatures: [25.0, 25.0]°C
Current: -0.2A
Voltage: 13.3V
Remaining capacity: 98.966Ah
Total capacity: 100.0Ah
State of charge: 98.966%
Cycle number: 0
Charge voltage limit: 14.8V
Discharge voltage limit: 10.0V
Charge current limit: 50.0A
Discharge current limit: -100.0A

Python usage

To use the library within your Python code

Charge Controller

from renogymodbus import RenogyChargeController

controller = RenogyChargeController("/dev/ttyUSB0", 1)
controller.get_solar_voltage()

See https://github.com/rosswarren/renogymodbus/blob/main/renogymodbus/charge_controller.py for all available methods

Smart Battery

from renogymodbus import RenogySmartBattery

battery = RenogySmartBattery("/dev/ttyUSB0", 48)
battery.get_voltage()

See https://github.com/rosswarren/renogymodbus/blob/main/renogymodbus/smart_battery.py for all available methods