Hi!
I ordered a MPPT 450/100 for my 2x 8 (380W each) panels solar System.
A friend told me the 450/100 would be perfect for my needs if I split my panels into 8+8.
Now I read (too late) that my 450/100 can only handle 450V total.
What happens when I have 2 times 8 panels connected and the voltage exceeds 450V? Will this destroy my MPPT?Total watts is 6040W (3020 per string).
Or does "maximum Voltage of 450V" relate to each string?
Thank You!!!
Maximum voltage refers to the max input and yes for each string. It can track each one separately.
See the Array sizing.
But the max VOC is usually 8 x float voltage of batteries.
You can download the MPPT spreadsheet to check your setup or do it online here.
THANK YOU :) :) :)
Is there any chance you could reconfigure the strings to 4 x 2 rather than 8 x1 or are your cable runs already sized and in place? From what I've seen and read the voltage limit really is a hard limit and you risk damaging your MPPT if it's exceeded.
I don't know if you're in a cold climate, but don't forget to factor in that panels will produce a notably higher voltage on cold, clear winter days.
