Wire size for sok batteries

[Mikmaster63]

I just received my Sok Batteries I’m going to wire four of them in parallel with a 3000 W inverter. Sok said use four gauge wire with a 300 amp fuse. The inverter calls for 4/0 wire 350 amp fuse. I’ve done a handful Battleborn installs and I know they don’t want you using 4/0 wire they want you using 1/0. so my question is can you pull 300 A through four gauge wire and does a 300 amp fuse going to protect four gauge wire?

 

[Just John]

I just received my Sok Batteries I’m going to wire four of them in parallel with a 3000 W inverter. Sok said use four gauge wire with a 300 amp fuse. The inverter calls for 4/0 wire 350 amp fuse. I’ve done a handful Battleborn installs and I know they don’t want you using 4/0 wire they want you using 1/0. so my question is can you pull 300 A through four gauge wire and does a 300 amp fuse going to protect four gauge wire?

This is what I use:

Circuit Wizard - Blue Sea Systems

4 gauge wire is undersized and should not be fused at 300 or 350 amps. The fuse is to protect the wires, and it won't.
4/0 is not 4 gauge, it's 0000 gauge.

 

[Mikmaster63]

This is what I use:

Circuit Wizard - Blue Sea Systems

4 gauge wire is undersized and should not be fused at 300 or 350 amps. The fuse is to protect the wires, and it won't.
4/0 is not 4 gauge, it's 0000 gauge.

Exactly…

 

[John Frum]

3000 ac watts / .85 conversion factor / 12 volts low cutoff = 294.117647059 service amps.
294.117647059 service amps / .8 fuse headroom = 367.647058824 fault amps.
That means a 350 amp fuse and wire rated > 350 amps.
You want the fuse to protect the wire not the other way round.

Interactive Wire Size Calculator

Battery Chargers, Inverters, Solar Components, and Wiring Supplies for Boats, RVs, and Off-Grid Applications.

baymarinesupply.com

 

[Mikmaster63]

3000 ac watts / .85 conversion factor / 12 volts low cutoff = 294.117647059 service amps.
294.117647059 service amps / .8 fuse headroom = 367.647058824 fault amps.
That means a 350 amp fuse and wire rated > 350 amps.
You want the fuse to protect the wire not the other way round.

Interactive Wire Size Calculator

Battery Chargers, Inverters, Solar Components, and Wiring Supplies for Boats, RVs, and Off-Grid Applications.

baymarinesupply.com

Exactly what I thought