classic 150 resting

[Vic]

   ...   I ran all these panels in the midnite sizing calculator before deciding on the classic 150 as it seemed to be a good fit with some room to expand later on. I am considering rewiring to 3 panels per string when I add more panels but I only have 10 panels altogether. Maybe I could find 2 more to match up.

   ...    I have Sharp ND-250 HAT Panels.
VMPP is 29.98 so must be 60 cell panels.
ISC - 9.03 A
VOC - 37.35 V
IMPP - 8.34    ...

Hi jenkingwt,

You make a good point,  that it appears that the Classic string Sizer  appears to not flag PV string configurations that have a bit too low Vmp.

I did plug in the major numbers that you gave for your Sharp PVs,  and  it did say "OK".  I did not have the exact temperature coefficient for Vmp,  probably,  as could not find your exact PVs listed online,  but for the most part these temp % numbers are all very similar from one PV compared to a different PV.

Strings of three will be about ideal for a 48 V system,  IMO.  This is what we run on a couple of systems here,  this works well.

FWIW,   Good Luck,   Vic