diy solar

diy solar

How to fuse (4 or 6x 330W panels) -- Checking my logic

hipringles

Solar Enthusiast
Joined
Jan 31, 2021
Messages
214
For sake of discussion, lets say 6 (40VOC 10A) panels in 3S2P (for a VOC ~120V)

Where should the inline fuses go? I assume I can wire each into series, branch connect, then fuse after the connector for ~25A?

Upon more research, it looks like the panels I have a short of 10.4A, and Max series fuse rating of 20A, meaning when I go into parallel, they would infact (barely) exceed 20 (20.8 vs 20), thus an inline fuse is needed on each line?
 
Last edited:
Technically, you are not required to fuse any strings until you add a 3rd parallel string:


Essentially, the panels are their own fuses.

If you choose to add fuses or breakers, it should be a 20A fuse or breaker on each string.
 
Back
Top