It will clip when over the Isc, but that also is a waste of potential yield. With 3270W total potential yield you are limited considering the idle consumption of the LV6548 is about 80W. It will take 1920Wh just to run the LV6548 for 24 hours unless you have it connected on AC input, then it will draw the 1920Wh from the grid.
I'm running JA Solar 530W panels, VOC is 49.65V, ISC is 13.43A and I run 8S. I do not use the MPPT's in the LV6548's. Originally I had a pair of EG4 6500EX's and the max I could pull thru those MPPT's was 3.9Kw with the 4.24Kw strings. When I first installed the LV6548's, I ran 4S and noticed yield was better simply because I was keeping the amperage down. I ordered a pair of
EG4 MPPT100-48HV and installed one with 8S while leaving one of the 4S strings on a LV6548. Array is 420 feet one way distance and I wanted to compare to see if the higher voltage made a difference. The 4S string was interesting and you have to remember the MPPT algorithm is different. In full sun with peak power, the 4S string would not output 1/2 the 8S string. In overcast or partly cloudy conditions, including low light morning/evening, the 4S would output more than 1/2 the 8s string. My guess is the amps were higher during peak sun and lower during other conditions and why I was seeing these results.
Since then I finished install of the second EG4 unit, my Youtube channel shows the setup. Both EG4 charge controllers are running 8S. I pulled 4.3Kw off each string during the summer with hazy skies at peak sun. Recently I was checking some things on a partly cloudy day and saw over 5Kw per string with cloud edge effect and with the clear skies I would see 4.6Kw per string for extended times other than cloud edge effect. Pretty amazing off 4.24Kw of panels.
I do recommend considering using a separate charge controller with those panels simply because they won't fit well with the LV6548 MPPT limits. If you decide down the road to add more PV, which I'm certain you will, then you could source panels that better fit the lower VOC limit of the LV6548 MPPT.
If I do add more panels, it will be closer to the house and I will find the best fit for the 250V limit. It's all about options and the EG4 unit is really a very good deal. You could add 2 more of your current panels and run it thru the EG4 unit. I purchased the JA Solar panels at the time because it was a deal I couldn't turn down but those higher VOC panels do not fit well with the 250V limits. Part of the reason I switched to the EG4 6500EX inverters which did not work out well. The EG4 charge controller on the other hand has worked quite well, I've had the one running since July 4th and the second unit since about August 1st. These units do have a firmware update available, it is to fix a phantom F01 code that sets in low light conditions.