I have a new 3.9kW 20 -195W panel system. My inverter reads PV output 84V in direct sun. I checked the control panel with a meter before & after fuses. 3 of 5 circuits ( 5 circuits , 4 panels each in series) reads ~84V in full sun. 2 of 5 are 0 V. I understand I need to troubleshoot each panel in the 0 V circuits as a panel(s) in each series may be bad. However, shouldn't the Voltage on the inverter be reading 84V+84V+84V or 252V? Is this an inaccurate calculation. Any other thoughts? Thanks