My Setup:
25kW GoodWe inverter + 28.8kWh Lynx F G2 battery
60 x 550W Canadian Solar Bifacial panels for a total of 33kW.
They are arranged in 4 strings, 18, 18, 10, 14. All panels aside from the 14 panel string face north, the 14 panel string faces south.
The inputs to the inverter are:
MPPT1-1: 18 panels
MPPT1-2: 18 panels
MPPT2: 10 panels
MPPT3: 14 panels
Now to my problem. I have noticed that sometimes the string voltage of MPPT1-1 and MPPT1-2 randomly shoots up by 100V which results in the current of the string dropping significantly. I can't seem to figure out why the voltage just "jumps" up for no reason. And I can't seem to figure out why or how it drops back down. This is probably best explained with a graph:
Blue line = MPPT1-1 (18 panels), Yellow line = MPPT1-2 (18 panels), Red line = MPPT2 (10 panels), Green line = MPPT3 (14 panels)
The volts normally hover around ~700V but then it goes to ~800V and you see a corresponding drop in current output. Also notice that when it's around the 700V mark, the line is thicker which I think is the MPPT logic constantly adjusting up/down to ensure it is at the right max power output. But at 800V it doesn't seem to be doing the same.

I don't think this is due to cloud cover and I get no shading from anything nearby. This can be seen by the same graph but with the other strings visible. See how on the 17 Jan, the current for the red and green strings are significantly higher than the blue and yellow?

As far as I can tell, I'm not exceeding any of the ratings of the MPPT inputs. I've actually disconnected all the strings and had only the 2x18 panels connected. When they are connected to MPPT1-1 and MPPT1-2 the volts are ~800V still however when I move one of the 18 panel strings onto another MPPT, they both drop down to 700V where they should be operating around.
Has anyone got any ideas as to what's happening?
25kW GoodWe inverter + 28.8kWh Lynx F G2 battery
60 x 550W Canadian Solar Bifacial panels for a total of 33kW.
They are arranged in 4 strings, 18, 18, 10, 14. All panels aside from the 14 panel string face north, the 14 panel string faces south.
The inputs to the inverter are:
MPPT1-1: 18 panels
MPPT1-2: 18 panels
MPPT2: 10 panels
MPPT3: 14 panels
Now to my problem. I have noticed that sometimes the string voltage of MPPT1-1 and MPPT1-2 randomly shoots up by 100V which results in the current of the string dropping significantly. I can't seem to figure out why the voltage just "jumps" up for no reason. And I can't seem to figure out why or how it drops back down. This is probably best explained with a graph:
Blue line = MPPT1-1 (18 panels), Yellow line = MPPT1-2 (18 panels), Red line = MPPT2 (10 panels), Green line = MPPT3 (14 panels)
The volts normally hover around ~700V but then it goes to ~800V and you see a corresponding drop in current output. Also notice that when it's around the 700V mark, the line is thicker which I think is the MPPT logic constantly adjusting up/down to ensure it is at the right max power output. But at 800V it doesn't seem to be doing the same.

I don't think this is due to cloud cover and I get no shading from anything nearby. This can be seen by the same graph but with the other strings visible. See how on the 17 Jan, the current for the red and green strings are significantly higher than the blue and yellow?

As far as I can tell, I'm not exceeding any of the ratings of the MPPT inputs. I've actually disconnected all the strings and had only the 2x18 panels connected. When they are connected to MPPT1-1 and MPPT1-2 the volts are ~800V still however when I move one of the 18 panel strings onto another MPPT, they both drop down to 700V where they should be operating around.
Has anyone got any ideas as to what's happening?