Jumper cables

[GalavantingGigawatt]

Has anyone tried these jumper cables? Curious if they would work with Cybertruck voltage system. I assume yes since it powers the 12v trailer power but making sure before I buy.

https://www.amazon.com/Safe-Start-Starter-Portable-Prioritizing/dp/B0DJTGTMRF

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[mongo]

Has anyone tried these jumper cables? Curious if they would work with Cybertruck voltage system. I assume yes since it powers the 12v trailer power but making sure before I buy.

https://www.amazon.com/Safe-Start-Starter-Portable-Prioritizing/dp/B0DJTGTMRF

It's iffy, the trailer aux is 30A max without e-brakes, 20A otherwise. A dead battery can/will pull more than that and trip the overcurrent protection.

 

[REM]

It's iffy, the trailer aux is 30A max without e-brakes, 20A otherwise. A dead battery can/will pull more than that and trip the overcurrent protection.

I agree, wouldn't risk this when you have a perfectly good 20 & 40 amp circuit in the truck bed.

Buy an A/C powered jump box.

 

[GalavantingGigawatt]

Good point. I didn’t consider amps

 

[mongo]

I agree, wouldn't risk this when you have a perfectly good 20 & 40 amp circuit in the truck bed.

Buy an A/C powered jump box.

For clarity, those are roughly 10x and 40x the peak power. 13.5V vs 120V vs 240V.

 

[BrockN]

I wouldn't try this without fully understanding how the truck protects the circuit from pulling too much current. At the very least, I'd hack the cable to put a fuse in just slightly less than what the truck is specified to supply.

 

[mongo]

I wouldn't try this without fully understanding how the truck protects the circuit from pulling too much current. At the very least, I'd hack the cable to put a fuse in just slightly less than what the truck is specified to supply.

I've stressed the auxiliary trailer feed with a dead battery and winch a few times. The module is fed 48V and outputs 13.5V so it likely has a current limited buck converter in it. If so, there is a low chance of damaging it.

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