48 Volt Panel Wiring
seant
Registered Users Posts: 9 ✭✭
I recently converted from 24 to 48 volts. When i converted, I had 10 panels. Thanks to the wind storm and a tree, I’m down to 6.
4-265 watt panels and 2- 250s
my bank is 8 487 Amp surretts connected to a power flex 80 with an aims inverter charger
its gonna take me about 10 days to get more panels in. What would be a good configuration with the panels I have left?
my run is about 80 feet and I’m using 6awg to CC
my bank is 8 487 Amp surretts connected to a power flex 80 with an aims inverter charger
its gonna take me about 10 days to get more panels in. What would be a good configuration with the panels I have left?
my run is about 80 feet and I’m using 6awg to CC
Comments
What is your present minimum ambient temperature?
For a 48 volt battery bank, you want a minimum Vmp-array voltage of ~72 volts (standard conditions... And ideally around 100 VDC (again nominal). In warmer climates, you can get away with higher Vmp-array-std voltages.
Vmp (and Voc) falls temperatures rise. And your array voltages rise as voltages fall.
You probably are looking at 3x panels in series times 2 parallel strings (Vmp~30 volts, 3x 30 volts = 90 Volts Vmp-array-std). If your Vmp-std is different...
There is a good chance that if your 265 and 250 Watt panels have reasonably "close" Vmp and Imp (10% difference or less... I.e., 30 volts for one, 33 to 27 volts Vmp for the other, etc.) they are close enough to connect in series parallel.
-Bill
250 36.9 VOC 29.8 VMP 8.39 IMP
265 38.3 31 8.55