I have 12 100w panels for charging my SOK 48V battery. I'm debating 4s3p vs 3s4p. I purchased a Victron 100/20 but I'm thinking it won't work.
Panel: Voc 24.6v, Vmp 20.6v, Imp 4.85a, Isc 5.28a
EDIT: Oh, and my trailer is pre-wired with 10 awg wire which is why I was trying to do 4s3p first. (Less voltage drop on the line) You can see the MC4 connector in the bottom right of the picture.
Panel: Voc 24.6v, Vmp 20.6v, Imp 4.85a, Isc 5.28a
- My original plan was 4s3p bringing total Voc to 98.4v and Isc to 15.84a. But this leaves no room for cold temperature Voc increases. If temperature drops to 0F Voc could reach 112.4v.
- In 3s4p the Voc is 73.8v and Isc is 21.12a. The Isc is now over the 20a rating of the Victron. This also has a Vmp of 61.8 which does not leave much room for line voltage drop. (57.6v charging voltage) And don't MPPT controllers prefer much higher voltages to work efficiently?
- Is my only choice here to buy the Victron 150/35?
- Does mounting angle affect Isc? I'm mounting them flat. 6 panels per side in my attached picture.
EDIT: Oh, and my trailer is pre-wired with 10 awg wire which is why I was trying to do 4s3p first. (Less voltage drop on the line) You can see the MC4 connector in the bottom right of the picture.