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diy solar

parallel vs series for 48v system

saltmarsh

New Member
Joined
Jul 26, 2023
Messages
10
Location
Southern Oregon
Hello everyone, I just purchased this (plus two extra of the panels for a total of 8 x 415w panels):

OFF-GRID SOLAR KIT 5000W 48VDC 120V LIFEPO4 10.24KWH LITHIUM BATTERY 6 X 415 WATTS SOLAR PANELS SGR-5KE


I'm trying to make sure I should go with a series panel connection. From what I can tell, parallel pv connections are typically for 12v systems. Is there a good reason to do parallel panels in a 48v system?

Also, my kit did not include a solar panel disconnect switch, or the T Class fuse on the parts list, following dead simple schematic per Will Prowse, below. Would you guys add any components that my kit did not, given the load? I'm in Southern Oregon, and there's an abundance of sunshine in the summer, but not so much in the winter. My priority is running a 9k 115v 20 SEER mini split to keep my tiny house at least 50 degrees F around the clock. I do have a small sub panel similar to the one in the photo...
1701283157098.png

1701283294840.png
 
Same as for a 12 volt system:

1) Panels are shaded at different time of day so need more than one array.
2) Need to stay within voltage input limitations for the AIO.

My guess is #2 could be the reason to parallel.
 
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