My inverter has two MPPT trackers that are rated for 15A max current per input and 20A DC short-circuit current. The MPPT voltage range is 130V to 500V. Currently, I have six 535W panels (Jinko Tiger Pro 535W) in a single string. The panel specs are:
I'm considering to over-panel the inverter without exceeding its max input ratings based on the panels. This will be accomplished by two strings connected to separate MPPT trackers. The maximum MPPT tracker voltage is 500V and the string open circuit voltage will be around 300Voc. The maximum MPPT tracker current is 15A and the string STC specs say 13.2A max current. Unfortunately connecting the existing PV string to just one of the outputs can produce higher than the rated max current under certain conditions. And here comes the concern.
Should I expect problems with the inverter if I'm having a PV string that can exceed the max current input? I kind of expect the answer to be no and the inverter to be smart enough to limit the current it draws from the panels, but if so - why are there the following two specs for the inverter:
- Maximum Power Current (Imp) STC 13.17A
- Short-circuit Current (Isc) STC 13.79A
- Maximum Power Voltage (Vmp) STC 40.63V
- Open-circuit Voltage (Voc) STC 49.34V
- Temperature coefficients of Isc 0.048%/°C
I'm considering to over-panel the inverter without exceeding its max input ratings based on the panels. This will be accomplished by two strings connected to separate MPPT trackers. The maximum MPPT tracker voltage is 500V and the string open circuit voltage will be around 300Voc. The maximum MPPT tracker current is 15A and the string STC specs say 13.2A max current. Unfortunately connecting the existing PV string to just one of the outputs can produce higher than the rated max current under certain conditions. And here comes the concern.
Should I expect problems with the inverter if I'm having a PV string that can exceed the max current input? I kind of expect the answer to be no and the inverter to be smart enough to limit the current it draws from the panels, but if so - why are there the following two specs for the inverter:
- Max. input current input A / input B is 15A / 15A
- Max. DC short-circuit current input A / input B is 20A / 20A