Available amperage

[Sneevly]

Hello, first time poster here. This may be a little off topic but I figured the lighting discussion with use of the aux switches would be the best place.

I plan on installing two 12v air compressors in the bed underneath my saddle tool box.

Max amp draw is rated at 21 amps. I plan on using switches 1 and 2 for this since each has a 30amp rating if I remember correctly.

My question is how much amperage can I draw from the battery and charging system without causing any harm? Obviously I'll have the truck running during use, but I will be drawing 42 amps while both compressors are running. I have the 6.2L engine 2014 model. Here is some information that is close to what I need, but I'm not sure what the truck normally uses at idle with the lights and fan on.

And no, I'm not installing a train horn.

 

[t_j]

Doesn’t matter too much, extra current will be drawn from the battery if the alternator can’t provide it all. However to be safe you should probably makes sure you have a agm or deep cycle battery installed. Lots of people run winches that draw 200-300 amp when running without issue.

 

[14 BlackScrew RR]

Sneevly, if your truck is equip with heated seats and heated mirrors, you can rest assured that the Alternator is capable of handling and extra 21 amps for the compressor.

 

[Sneevly]

Doesn’t matter too much, extra current will be drawn from the battery if the alternator can’t provide it all. However to be safe you should probably makes sure you have a agm or deep cycle battery installed. Lots of people run winches that draw 200-300 amp when running without issue.

Its funny because my jeep has a ***** and I never considered how much amps it was drawing, even after hooking up those large gauge wires. 42 amps should be just fine, thank you for pointing this out.