Important! Wire sizing for current draw

Hi Guys

I have been reading the thread and thought i would butt in.

The switch may be rated to 300A but this is more than likely at 12vDC. If you look at the data sheet for this switch from LittleFuse, you can see it can provide constant 400A @12vDC however by the time you hit 36vDC it has dropped to 200A.

The OpenPPG is running 48vDC if i’m correct. If we ahve a proper datasheet for the switch you also have the values for the peak running through the switch.