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Upgrade your electric golf cart to 72 volts!

Summary

This is for 72 volts. These are list's of electrical components that will get you started on your way.
The first list is if you want everything electric.
{ Pictures are for viewing only they may are may not be on a 72 volt cart}

parts needed

1. Controller that can handle 72 volts
2. Contactor's for 72 volts, both main and F/R and Bypass if used
3. Cables to handle the amps
4. Motor to handle the voltage & amps

how to..

Alltrax 72 volt controller: 7245 24-72V
A big factor here is how long it will pull the amps. The 450amp is only good for 30 seconds and there is no rating from 30 seconds to 5 minutes so I can't say.
5minutes is 350amps
60 minutes is 200amps
download.jpg


Note these are 400amp F/R contactor: Should be good enough for most carts
upload_2016-12-14_18-8-5.jpeg

Contact Ratings
Contact Form 2Z
Contact circuit Voltage and loading current(resistant) 84VDC Max 400A
Contact Resistance 30mohm Max.
20+-5C cold state max motion voltage(VDC) Pick-up <=70% of rated voltage
Drop-out 5%-30% of rated voltage
Mechanical life(Min.) 100,000 Ops
Electrical life(Min.) 50,000 Ops
Coil Ratings
Coil rated voltage 72VDC
Max coil current under the rated voltage 0.1A
With 20+-5C cold state starting coil max current

Specification
Insulation Resistance 100Mohm Min.
Dielectric strength Between Contacts 2000VAC.
Between coil and contacts 1500VAC.
Environment temperature and attitude -40C-+85C; 0-20000m
Max relative humidity 98%
The shocking of fixed point 1 Frequency(11Z) 10-200
Acceleration(g) <3.5
Shocking Speed(time/min.) 60-100
Acceleration(g) 4
Constant acceleration 8
Operation regulation Continue
Installation direction Random


72 volt 400 amp main contactor:
Kelly-ZJW-72V-400A-2T.jpg


Contact Ratings
Contact Form 1H
Contact circuit Voltage and loading current(resistant) 84VDC Max 400A
Contact Resistance 30mohm Max.
20+-5C cold state max motion voltage(VDC) Pick-up <=70% of rated voltage
Drop-out 5%-30% of rated voltage
Machanical life(Min.) 100,000 Ops
Electrical life(Min.) 50,000 Ops
Coil Ratings
Coil rated voltage 24V,36V,48V,72V,84 VDC
Max coil current under the rated voltage 0.1A
With 20+-5C cold state starting coil max current

Specification
Insulation Resistance 100Mohm Min.
Dielectric strength Between Contacts 2000VAC.
Between coil and contacts 1500VAC.
Environment temperature and attitude -40C - +85C; 0-20000m
Max relative humidity 98%
The shocking of fixed point 1 Frequency(11Z) 10-200
Acceleration(g) <3.5
Shocking Speed(time/min.) 60-100
Acceleration(g) 4
Constant acceleration 8
Operation regulation Continue
Installation direction Random

I can't stress how much your cables and all the wiring must be in top shape for a high voltage cart. Everything needs to be check often and kept in very good shape. Cables should be crimped and heat shrinked at the least.
upload_2016-12-14_18-8-32.jpeg

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