Can I connect 2 strings of 15x 400 watt, 40.3 volt panels to the Fronius Primo 11.4-1 Solar Inverter?
Posted by Frank Molina, Stellavolta on May 3rd 2021
No. At 604.5 volts per string with 15 panels on each string, you would be exceeding the inverter's capability. Although it may work sometimes, during peak season, this is likely to cause issues with your system.
Since the inverter has 2 MPPTs, instead you could connect 4 strings of 7 panels with 2 strings on each MPPT.