I have a;
6 panel 420w array at 85v that feeds into a 150/45 victron mppt and a
4 panel 330w array at 70v that feeds into a 100/20 victron mppt.
The array size difference its about 63% so in my head I would expect that to be the difference in watt output between the two (both have the same orientation outside).
But the actual watt difference is quite large, the larger array actually outputs about 120% as much power as the smaller array.
My question is, are the smaller capacity mppt's less efficient at managing the array even though the numbers are within tolerances? Am I likely to get closer to my expected outputs if I used say a 150/35 on the smaller array? Or is the difference purely down to the panel efficiency?
you can see the huge difference above