If you read the Xantrex book carefully it says not to exceed the inverters max input current with panels that will deliver more than that. (short circuit rating)
It also says you need to remain within the voltage operating window.
Hence 10 panels per string = AOK
and / or upto 4 parallel strings of panels (with short circuit current =<6A)
Ultimately comes down to what your CEC guy will sign off on
24 panels is therefore not out of the question (3 strings of 8 panels) 4560W
nor is 20 panels in one string....
Obviously at certain times of the day there will be yield losses
DC input voltage range 195 - 600 volts DC
Peak power tracking range 195 - 550 volts DC
Recommended PV array size 3070 watts
Maximum array short circuit current 24Adc
Myself:- I'm working in a beaurocratic regime where 5000W is the max inverter and
hence I have to cop some losses with a big array, ask anyone who has a big array
on a smaller inverter and they all tell you the same thing- go for it.
20% overpowering and you wont loose anything more than you can count on one hand yearly
25%overpowering and you'll clip farly regularly but wont be more than 30kWhrs a year or so
30% over and there is going to be some decent clip.
As I said before, I'm perfectly happy running 24 panels on a similarly sized 3000HF SMA
the array over 4300W.
20 panels on the Xantrex is fine by my maths 45V x 10panels =450V gives you a solid 150V up your sleeve
its only 3800W which is 26% overpowered.
I'd be doing that in a heartbeat.
