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Old 09-13-2021, 06:42 PM   #1
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converter/charger swap

can i use my 35 amp cord if i upgrade to a 55 amp converter/charger
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Old 09-13-2021, 07:33 PM   #2
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Welcome to iRV2.

It would really , really , really help to know what RV your working on .

At max charge rate the 55 amp charger could easily overheat the wiring between the converter and the battery . So it'd be important to know that wiring's size and length.
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Old 09-13-2021, 08:28 PM   #3
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Upgrading a converter/charger

Quote:
Originally Posted by saiter View Post
can i use my 35 amp cord if i upgrade to a 55 amp converter/charger
RV come with all kinds of power system configurations. Specifics are required for good advice. However, the wording of your question is a little odd. It is possible you don't know the basics.

RV's usually come with a 30 amp 120 volt or a 50 amp 240 volt shore power system. The 30 amp shore power cord is smaller and lighter.

RV's usually have a 12 volt DC lead acid battery powered system as well. The batteries are often charged using a built in converter/charger or a inverter/converter/charger.

If you are upgrading a converter/charger then the shore power cord and 120 volt AC system are not involved.

The wire from charger needs to be larger. A 30 amp 12 volt DC charger needs at least 10 gauge wire to carry 30 amps for 4 feet. Longer distances require larger wire.

A 55 amp 12 volt DC charger requires 6 gauge wire for 4 feet. Larger wire is required for longer distance.

Larger fuses, circuit breakers, and connectors are also required for 55 amps.

I wish you good luck and happy trails ahead!
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Old 09-13-2021, 11:36 PM   #4
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converter swap i have a 1995 dutchmen popup camper with a 35 amp converter

i want to to put in a 55 amp that i have i dont know if i need to put a heavier power cord for shore line and what guage i would need for the battery camper has 3 12 volt draws 2 lights and a exhaust fan thanks
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Old 09-14-2021, 12:04 AM   #5
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30A RV Power COrd provides up to 120VAC 30 amp draw for AC equipment

Converter/Charger has AC input and 12VDC Output
The 55A you are asking about is 12VDC amps NOT 120VAC amps
*120VAC amps would be 5A if converter was at full rating

Depending on the gauge wire from battery to the DC Fuse Panel on current converter would need to be rated for 55A
If not then you would need to pull New heavier gauge wire from battery to DC Fuse/Converter connections
Also distance from battery to DC Fuse Panel/Converter......

You probably have 10 gauge wire....if distance is more then 5 feet then you would need 8 gauge wire...more then 7 feet/6 gauge wire



SO..........
What Brand/Model is current Converter?
How far is length of wiring from battery to DC Fuse Panel/Converter?
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Old 09-14-2021, 03:38 PM   #6
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converter swap

series 6400 md 6409 magnetek convert went bad its about 7 feet to the battery its a 35 amp i have a new atwood 39039 55 amp sitting here
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Old 09-14-2021, 07:35 PM   #7
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series 6400 md 6409 magnetek convert went bad its about 7 feet to the battery its a 35 amp i have a new atwood 39039 55 amp sitting here your answer helped a lot thank you
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Old 09-14-2021, 09:26 PM   #8
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series 6400 md 6409 magnetek convert went bad its about 7 feet to the battery its a 35 amp i have a new Atwood 39039 55 amp sitting here we have a 1995 dutchmen popup camper
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Old 09-15-2021, 07:44 AM   #9
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Installing Atwood MPD 390039

See installation instructions for the Atwood charger.
APS MODELS: 32, 45 AND 55 AMP
APS-3230, APS-4530 AND APS-5530 - 30 AMPS AC MAIN
APS-5550 - 50 AMPS AC MAIN

https://www.gulfstreamcoach.com/medi...r-Manual-1.pdf

Atwood made a 30 amp 120 volt AC model and a 50 amp 240 volt AC model.
If you have a 30 amp model you need 10 gauge 3 wire cable for shore power.
The 50 amp model requires 8 gauge 4 wire cable.

The 12 volt DC side of the converter charger can be 32, 45, or 55 amps.

Assuming you have a 55 amp charger, you need 8 gauge wire from the Atwood to battery, both positive and negative. You also probably need a 55 amp fuse in the positive wire.

4 gauge wire would charge a little faster if you have a large battery bank. I am not sure if you said you have three 12 volt batteries. You could use a 100 amp fuse with 4 gauge wire.

I wish you good luck and happy trails ahead!
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Old 09-15-2021, 08:25 AM   #10
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Install Atwood 35445

See installation instructions.
SRV-32, SRV-45, SRV-55, SRV-75

https://bryantrv.com/docs2/docs/atwoodconverter.pdf
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Old 09-15-2021, 09:04 AM   #11
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i have 1 battery and the model converter i have is aps-5530 the manual says use a 30 amp breaker as my mane idk im thinking i need something smaller for a popup
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Old 09-16-2021, 11:29 AM   #12
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Quote:
Originally Posted by saiter View Post
i have 1 battery and the model converter i have is aps-5530 the manual says use a 30 amp breaker as my mane idk im thinking i need something smaller for a popup
I could not find a manual for a Magnatek 6409, so I don't know what is already in place.

APS 5530 requires a 30 amp 120 volt three wire power cord. It likely already has a 30 amp 120 volt main breaker in its breaker panel.
https://www.etrailer.com/RV-Power-Co...3025EHLED.html
https://www.etrailer.com/RV-Power-Co...77-000148.html

It also requires 4 gauge (4 AWG) wire between the APS 5530 and the battery 7 feet away. Run two 4 gauge wires, one red or positive and one black or negative. You can get custom made wire with proper crimped connectors pre-installed from sellers on Amazon.com.
https://www.amazon.com/dp/B07L45VCC7...NrPXRydWU&th=1

You will need a branch breaker for each branch 120 volt circuit in your camper. It probably needs to be 15 amps. See the branch circuit breaker chart in the link to installation instructions posted above.

I am not sure about branch 12 volt circuits. Maybe item "10" in the instructions is for 12 volt branch fuses. If so use the same size fuse as the Magnatek uses for each circuit.
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Old 09-18-2021, 08:11 PM   #13
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converter swap

thanks for all the help i got it donr
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