[RE-wrenches] 24V Module Query

[William Miller]

Friends:

Again, welcome to the world of PV design.

I suggest one become accomplished at analyzing IV curves for various PV 
strings.  I created a spreadsheet that helps me analyze these values.  You 
can then see if you can mix and match modules to find workable solutions.

I recently was asked to upgrade a system with a bunch of Arco modules.  I 
found that if I mixed strings of I believe 3 or 4 Arco modules with strings 
of 1 or 2 Solar World modules (exact quantities escape me), I had a pretty 
good match.  We connected these to an MX60.  After install, we tested MPP 
parameters and charging rates of each string individually and the strings 
combined and we found the system worked pretty well.

Good luck,

William Miller