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Old 05-08-2023, 10:59 AM   #1
jhindman
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Default 36v to 48v

I was told by plum quick that since I already have the altrax controller, in order change my cart from 36v to 48v all I really need to do is buy a 48v charger and 6 X 8V batteries. The motor can run on either voltage. Can anyone confirm this?
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Old 05-08-2023, 11:06 AM   #2
kgsc
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Default Re: 36v to 48v

Correct. You will also need a new solenoid and to program the controller for the new voltage.
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Old 05-08-2023, 11:18 AM   #3
jhindman
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Default Re: 36v to 48v

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Originally Posted by kgsc View Post
Correct. You will also need a new solenoid and to program the controller for the new voltage.
When I did the controller i got a solenoid that was good for 48v as well I thought I may need to double check this.

I thought it was just the diode that needed top change the diode???
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Old 05-08-2023, 11:53 AM   #4
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Default Re: 36v to 48v

Diode should be okay because you are not changing the controller. Which one do you have?
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Old 05-08-2023, 12:49 PM   #5
scottyb
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Default Re: 36v to 48v

The diode should be 3 amps 1000v like 1N5408. If you got the diode from us 1N5408 is the only one we carry. Many stores sell a 1 amp 36v diode. The resistor should be 10w 470Ω.
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Old 05-08-2023, 01:51 PM   #6
jhindman
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Default Re: 36v to 48v

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Originally Posted by kgsc View Post
diode should be okay because you are not changing the controller. Which one do you have?

mzj400a is the solenoid I have
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Old 05-08-2023, 01:56 PM   #7
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Default Re: 36v to 48v

Sorry I should’ve been clearer.. What controller?
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Old 05-08-2023, 02:17 PM   #8
mzimme14
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Default Re: 36v to 48v

That's correct, but you'll also want a new solenoid, new wires, and new F/R switch for best performance.
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Old 05-08-2023, 03:14 PM   #9
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Default Re: 36v to 48v

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Originally Posted by mzimme14 View Post
That's correct, but you'll also want a new solenoid, new wires, and new F/R switch for best performance.
I don't see a need to change the MZJ400A 36/48v solenoid or the F&R switch. 48v uses less amperage than 36v to do the same amount of work. Less amperage creates less heat in all the components from motor to F&R.
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Old 05-08-2023, 03:16 PM   #10
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Default Re: 36v to 48v

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Originally Posted by mzimme14 View Post
That's correct, but you'll also want a new solenoid, new wires, and new F/R switch for best performance.
ok so this needs to be addressed. When you upgrade a golfcart from 36v to 48v and use the same motor, unless your use changes you will actually be pulling LESS current through the wires and switches to move that cart at the same speeds. This means the heavy duty stuff is needed more with 36v than 48v.

If your planning on long WOT stints you will ideally want to upgrade the motor as well as the wiring because your far more likely to burn it up.

this is the same reason people often wire solar panels in a series instead of parallel as the higher voltage with less amps traveling through the wires means thinner wires with the same power potential.
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