Can an electrical guru help?

[danba]

I bought a 24V compressor instead of a 12V. I'll be using a 12V to 24 transformer to feed it proper voltage. However I'm confused by this ARB diagram:

Why is the BLK wire going to the Battery 2 Negative? Can I just connect both the BLK and the BLK-WHT on my ARB compressor to the 24V+ and 24V- cables on my transformer?

BTW, this is the convertor: https://www.amazon.com/dp/B09YY715Q1

Thanks!

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[Yawnie'sPapa]

I bought a 24V compressor instead of a 12V. I'll be using a 12V to 24 transformer to feed it proper voltage. However I'm confused by this ARB diagram:

Why is the BLK wire going to the Battery 2 Negative? Can I just connect both the BLK and the BLK-WHT on my ARB compressor to the 24V+ and 24V- cables on my transformer?

BTW, this is the convertor: https://www.amazon.com/dp/B09YY715Q1

Thanks!

How are you going to use a transformer on DC current?
Transformers - a true transformer, can only work with non-DC power.

Looking at the ARB diagram also tells me - it isn't going to fly.

 

[GATORB8]

I bought a 24V compressor instead of a 12V. I'll be using a 12V to 24 transformer to feed it proper voltage. However I'm confused by this ARB diagram:

Why is the BLK wire going to the Battery 2 Negative? Can I just connect both the BLK and the BLK-WHT on my ARB compressor to the 24V+ and 24V- cables on my transformer?

BTW, this is the convertor: https://www.amazon.com/dp/B09YY715Q1

Thanks!

It's running dual voltage. Something is on 12V and something is on 24V

That converter is not big enough.

 

[danba]

I bought a 24V compressor instead of a 12V. I'll be using a 12V to 24 transformer to feed it proper voltage. However I'm confused by this ARB diagram:

Why is the BLK wire going to the Battery 2 Negative? Can I just connect both the BLK and the BLK-WHT on my ARB compressor to the 24V+ and 24V- cables on my transformer?

BTW, this is the convertor: https://www.amazon.com/dp/B09YY715Q1

Thanks!

It's running dual voltage. Something is on 12V and something is on 24V

That converter is not big enough.

The convertor is 20A@24V, the way I read it at least. That is more than the ARB is rated at max 24V draw (forgot the number, but I know I've checked it. I think it's 16A).

Please correct me if I'm wrong.

As far as the dual voltage, does it mean that I can feed it 24V from 12V from the battery?!? Can't be! That would require two separate positive (+) feeds.

I need to follow the diagram - the 12V might only feed the lamps on the switches.

 

[GATORB8]

The convertor is 20A@24V, the way I read it at least. That is more than the ARB is rated at max 24V draw (forgot the number, but I know I've checked it. I think it's 16A).

Please correct me if I'm wrong.

As far as the dual voltage, does it mean that I can feed it 24V from 12V from the battery?!? Can't be! That would require two separate positive (+) feeds.

I need to follow the diagram - the 12V might only feed the lamps on the switches.

14 amps is no load (half of the 12V no load), under load would be 25 amps (half of the 12 V load). Plus some voltage loss headroom.

No, in a system with dual 12 V batteries, you can draw either 12 or 24 V. in a system with a single 12V battery, you can only draw 12V. In this case, one circuit is drawing 12 V (the one with the small ground) and one circuit is drawing 24V (the one with the big ground).

 

[GATORB8]

Note, the compressor can exceed the "load" rating significantly, max is 34.3 amps @ 24V:

https://www.arb.com.au/assets/air-lockers/6-07.pdf

 

[danba]

How are you going to use a transformer on DC current?
Transformers - a true transformer, can only work with non-DC power.

Looking at the ARB diagram also tells me - it isn't going to fly.

My liberty in using improper terms, like transformer instead of up converter, shows my "knowledge" of electrical devices .

 

[Santana74]

Voltage is added in series and constant in parallel (might be worded weird). Negative term connected to Positive term is putting two 12v batteries in series, 24v.
A stock Jeep has 2 batteries. You could put these in series and see if the amps are enough to run the compressor. Don't blame me if you blow your Jeep up, it was only an idea. JK

 

[DonH63]

I'd return the 24 V compressor and get a 12 V one to save a lot of current and future headaches.

 

[GATORB8]

Voltage is added in series and constant in parallel (might be worded weird). Negative term connected to Positive term is putting two 12v batteries in series, 24v.
A stock Jeep has 2 batteries. You could put these in series and see if the amps are enough to run the compressor. Don't blame me if you blow your Jeep up, it was only an idea. JK

The two batteries in the ESS Jeeps are already wired in parallel, can't just add a series connection, you'd be grounding a positive terminal.

 

[DonH63]

As a guess, assuming the wires in your diagram are going to the compressor, and assuming the smaller wire is for control circuits so not a heavy load, then you could try connecting BLK-WHT to ground, BLK to the positive terminal of your 12 V battery, and RED to the 24 V output of your converter. Then pray nothing gets grounded or shorted along the way. Read the instructions carefully; you may need to isolate the compressor.

If it is an ARB compressor, why not ask them?

Still think getting the correct compressor will save you grief.

 

[GATORB8]

Note, checking the ARB parts manual, the compressor/motors are different between the 12 and 24, so no easy wiring solution.

If you can't return it, looks like you can get the 12V replacement compressor part for $173 here: https://www.polyperformance.com/arb-air-compressor-replacement-parts
(No personal experience with the vendor)

 

[danba]

I have a 392 which only has one battery.

Note, the compressor can exceed the "load" rating significantly, max is 34.3 amps @ 24V:

https://www.arb.com.au/assets/air-lockers/6-07.pdf

Correct. I also seem to lack reading comprehension: not only did I misread the compressor voltage, but also this convertor's ratings:

• Output Voltage: 24V(Fixed Output), Output Current:20A, Output Power:480W, High Conversion Efficiency: up to 97%

Geez!

 

[danba]

Note, checking the ARB parts manual, the compressor/motors are different between the 12 and 24, so no easy wiring solution.

If you can't return it, looks like you can get the 12V replacement compressor part for $173 here: https://www.polyperformance.com/arb-air-compressor-replacement-parts
(No personal experience with the vendor)

Thanks! This forum is always a great resource!

 

[DonH63]

The two batteries in the ESS Jeeps are already wired in parallel, can't just add a series connection, you'd be grounding a positive terminal.

Note the OP has a 392, so no ESS, and only one (12 V) battery.

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