There is another known issue with JSunnyReports.
The Dial image for the inverter is hardcoded in the index.template. Code excerpt:
<div> <p>Omvormer(s)</p> <img src="SB1100.png"> </div>
Notice the IMG SRC. Its hardcoded to my own invertername ( SB1100 ). Just change the part before the dot with the name of your inverter you entered in your INVERTERS.INI file. After saving your index.template run JSunnyReports once more and everything should work