Thread: O-I_C
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Old 11-11-2020, 07:25 AM   #1989
yawood
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Join Date: Jan 2017
Location: Queensland Australia
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Default Re: Switch for 12 volt converter, 48v cart

If you have a 4-wire voltage reducer it is best to run it through a 48V relay. You can run the relay from the key switch or you can put in an extra toggle switch so that you can turn the converter off even when the key is on.

The first diagram shows a relay and a toggle switch but you can leave out the toggle switch and just operate the relay from the key switch. The key switch (& toggle if there is one) only carries the current needed to operate the relay (a small current) and the main relay contacts carry the larger current pulled by the voltage converter.

The second picture shows the relay that you need and the connections to it.

By-the-way, if you have a cart with an OBC you should connect your 48V negative to the B- of the controller, not to the battery terminal. The Precedent has a wire specially for this purpose (a black wire with a yellow bullet connector sitting behind the batteries). This is so that the OBC recognises how much energy is being taken by the reducer and runs the charger sufficiently to replace it. Otherwise, over time the batteries will be under-charged.
Attached Images
File Type: jpg Voltage Reducer Wiring with 48v Toggle with diode.jpg (53.1 KB, 0 views)
File Type: jpg Relay Installation.jpg (228.4 KB, 0 views)
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