The current setup has a battery switch directly over the power supply. So a positive and negative 6awg wire with two large alligator clips. We effectively have 0.1V, 50A coming out of the supply, so a tiny wattage but high current. The ripples on the output could be causing some damage.
On the topic of switching, we're using a pair of alligator clips to connect to the battery terminals. I didn't think much of it, but now I'm typing it, 50A connected via alligator clips sounds like a potential issue with the arcing and all.
@Gyro @Slh, cheers for the suggestions!
I'll try a couple of things
- I have a few large 0.25\$\Omega\$ resistors, so I'll put a couple in and scope the output to see if it looks cleaner.
- I'll investigate a more appropriate switch, so the alligator clips can be attached without any current flowing
+ Our battery switch isn't designed to switch more than 10A (although it can run 200A while on)
+ The BK doesn't have an on/off button, but the remote port does have an off pin, so I might be able to wire that in to turn the output off
An appropriate switch and a higher voltage may be the key to a more reliable setup!