150 Voc limit using panels with 35v Vmp and 42v Voc means 150/42 = 3 panels in series is the limit?
Correct
So to double the array wattage to 1200w and stay inside the 150 Voc you need to double the length and width of the three panels, because you can't use six of those others in series
Not sure how you would increase the size of the panels..........???
Or run another three-panel string in parallel but that doubles the amps,
Now you have GOT IT
A series parallel combination of the panels to create the needed watts within the voltage limits. I do the very same thing with my four 20 Voc panels to increase the voltage thus reduce the current from the array to the controller
Volts times amps = Watts / raise either V or A and the watts increase
but you want to stay inside the 45amps limit.
Not really
You want to stay within the WATT limit on th einput side for the operational voltage 12, 24, 36, or 48
I have got myself all confused again.
It's all Good no worries
