Voltage input limit for Classic 200?

[charlespyoung]

I am considering upping the voltage from the array into the Classic 200 from 3 strings of 4 modules at 120V to 2 strings of 6 modules at 180V. Is that too much voltage? This is in Haiti so temps run from 70-90ºF.

[Vic]

Hi Charles,

Have you run your proposed configuration on the MidNite Classic String Sizer (?):
http://midnitesolar.com/sizingTool/displaySizing.php

Vic

[charlespyoung]

Yes. It checked out okay. 0.9

[Vic]

OK,  Charles.   Did data from the String Sizer answer your questions?

Vic

[CDN-VT]

I would also ask what is the battery voltage of the system ?
A huge step down will make the classic work harder .

Why is it you want to up the panel voltage ?
VT

[charlespyoung]

System battery voltage is 48V. We have 2 strings of 8 Rolls S-550's. That is why I posted this to the forum because I know I am in the upper limits of the CC and needing some additional input. I can go with 4 module PV circuits to be safer.

[CDN-VT]

Well that will be warm as with your Area for the classic to work 180 Vdc at  3 times the 60 Vdc the Cells need .
I would check the classic MNGP under temps & see what is NOW & after .. Voltage wise your good , but heat value is what would concern me.

VT