Switch for 12 volt converter, 48v cart

[mrgolf]

My reducer is 12 amp. I have a total 12 volt load of I think was 6 amps at 12 volts the last time I checked. My 48 volt load was 2.75 amp.

[Mooncarter]

Originally Posted by mrgolf

My reducer is 12 amp. I have a total 12 volt load of I think was 6 amps at 12 volts the last time I checked. My 48 volt load was 2.75 amp.

This is going to confuse the hell out of him. He wants to turn the reducer OFF.

[yawood]

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.

[CP241]

15A rocker on/off switches are a dime a dozen. Pick one of those up and you’ll be fine. A marine version would be best in case you get caught in the rain

[Andy4639]

Heck you can always wire in another 48 volt solenoid from the key switch and it would cut everything off when the cart is off.

[R&TBabich]

Originally Posted by Andy4639

Heck you can always wire in another 48 volt solenoid from the key switch and it would cut everything off when the cart is off.

That's what I did, added a 48v 40A relay triggered by the Key Switch which cuts power to the 48v input to the reducer, works great.
Got 3 for $12 on Amazon.

[yawood]

Originally Posted by Andy4639

Heck you can always wire in another 48 volt solenoid from the key switch and it would cut everything off when the cart is off.

That's what my diagram is all about.

[Mooncarter]

Originally Posted by yawood

That's what my diagram is all about.

And a very nice one too!

[rthomas61]

I’d rather the converter be on its own switch so I don’t have to have the cart on and still charge the phones. Just want to have a switch of some sort between the battery pack and the converter.

[Mooncarter]

Originally Posted by rthomas61

I’d rather the converter be on its own switch so I don’t have to have the cart on and still charge the phones. Just want to have a switch of some sort between the battery pack and the converter.

Look at Yawood's diagram. See that toggle switch? Just put one of those between pack positive and the reducer.