OK 12v lithium batteries in parallel. Max charge current 70a, recommended 40a. Max continuous discharge current 100a each, peak 200a(3sec). I believe I will put a MBRF or ANL fuse on the positive terminal or close to it of each battery. What size should it be? I’ve read 120% of either max or peak but don’t know which it should be.
What size fuses?
- Thread starter neoflyer
- Start date
DIYrich
Solar Wizard
What size wire?
4/0
Then don't go larger than 250A.
Gives plenty of safety for the wire, and handles surge loads fine.
Smaller fuses just become a resistance point.
Size fuses to protect the wire attached to the batteries.
4/0 is capable of 270A at 90C... that is what I would set as an absolute max...
Size fuses to protect the wire attached to the batteries.
4/0 is capable of 270A at 90C... that is what I would set as an absolute max...
Are ANL fuses what I need? Are they specified by voltage, 12v say, or max voltage, 32v? Can I attach them directly to the 5/16” battery posts then the cables or do I need fuse holders? If I need fuse holders I will need very short 4/0 cables to connect the battery terminal to the fuse holder. Is that correct.
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Just to be clear. I believe I should install one fuse for EACH battery. Is that correct? Or are you giving the size of fuse for one fuse on the cable connecting both batteries to the battery buss or one fuse at each battery?
In parallel scenarios, each bank needs fusing.
