FelicitySolar Inverter Monitor

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This application allows you to monitor Felicity inverters in realtime via a RJ45 to USB cable as an alternative to the wifi module and cloud based apps.

For this to work, you need to connect a computer such as a Raspberry/Orange Pi or any other computer (Linux or Windows) to the inverter via USB port to the inverters RJ45 port marked RS232 which is typically on the left next to the BMS port. This application has not been tested on MacOS but might work if you can figure out the correct drivers and port names.

Once your inverter is connected via data cable, a new device should appear on Linux at /dev/ttyUSBX or COMX in Windows. Open up the appsettings.json file and make sure the DeviceAddress setting correctly points to your USB device such as /dev/ttyUSB1 or COM1.

After the correct USB device path is setup, all you have to do is execute the InverterMon.Server executable. The binaries can be downloaded from the releases section. Make sure to choose the correct architecture (x64/arm) for your machine.

After the application has started successfully, you can simply open up a web browser and navigate to http://ip.address.of.machine or http://localhost if the app is running in the same machine as your web browser, to see the dashboard. It may take up to 5 seconds for the data to show up initially.

If you have a firewall, please open port 80 to facilitate communication, or change the port in the appsettings.json file.

In order to make the application/server automatically start at boot in Linux, follow the below procedure to create a systemd service.

Auto Start Configuration Steps

open the following file (or the correct one for your OS):

sudo nano /lib/udev/rules.d/99-systemd.rules

add the following text to the end:

KERNEL=="ttyUSB1", SYMLINK="ttyUSB1", TAG+="systemd"

create a new file for the service

sudo nano /etc/systemd/system/invertermon.service

copy/paste the following:

[Unit]
Description=Felicity Inverter Monitor

#change here if device is hidraw
After=dev-ttyUSB1.device

[Service]
Type=simple
User=root
Group=root
UMask=000

#put the downloaded files in here
WorkingDirectory=/inverter
ExecStart=/inverter/InverterMon.Server

Restart=always
RestartSec=30

[Install]
WantedBy=multi-user.target

run the following commands to enable and start the service:

sudo systemctl enable invertermon
sudo systemctl start invertermon
sudo systemctl status invertermon

restart the machine to check if the service was configured correctly.

JK BMS Support

If you have a JK BMS + JK RS485 adapter + USB->TTL adapter, simply wire them up correctly and plug it in to the computer. The app will try to connect to the BMS via serial port by default at address /dev/ttyUSB0. If your USB->TTL device is mounted at a different device path, simply update the appsettings.json file with the correct path like so:

{
  "LaunchSettings": {
    "JkBmsAddress": "/dev/ttyUSB1"
  }
}