Smoking 12V Voltage Regulator

[sockeye342]

Hi All-

I bought the Nissan leaf pack for my 36v 1988 Western golf cart last month. I had existing lights, radio, cigarette lighter. on the cart with the old lead batteries. Both the positive and negative have a fuse holder with a 25 amp fuse.

I installed a new voltage regulator to run the accessories off the old lines.
It is Daygreen 48v step down to 12v 20amp 36v to 12v (there is an attached image) to the existing wiring which went between two of the original 6V batteries to run the accessories originally.

No problem when I originally tested it with just the cart sitting.

On the move, I first blew a fuse on the negative side coming off the battery pack into the regulator and after a fuse replacement, I tried again and it got too hot and I smoked the regulator.

Do you think a better quality voltage reducer would take care of the problem or is there something else I need to do in addition to this?

Pics include original reducer added on recently, me holding the positive wire to the leaf pack from the reducer 36V side, me pointing at the negative side of the fuse holder back to the Leaf pack where the fuse keeps blowing and the last one of the reducer tieing all connections back into the original wiring.

Thanks for the help
Jeff

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[S-N-R Customs]

I would double check your wiring again since you connected them to different color jumpers/extenders everywhere... did you separate the negatives? One completely separate negative system for all the 12v accessories? If not that could be your problem.


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[scottyb]

What is the voltage of this pack after a full charge? Maybe the lithium pack exceeded the reducer's 48v threshold. Or maybe it was wired on all the time?

[sockeye342]

Originally Posted by S-N-R Customs

I would double check your wiring again since you connected them to different color jumpers/extenders everywhere... did you separate the negatives? One completely separate negative system for all the 12v accessories? If not that could be your problem.


Sent from my iPhone using Tapatalk

The positive and negative to the accessories was part of the original setup before I switched to the Lithium Pack. It worked fine before.

[sockeye342]

Originally Posted by scottyb

What is the voltage of this pack after a full charge? Maybe the lithium pack exceeded the reducer's 48v threshold. Or maybe it was wired on all the time?

41.8 is the voltage at a full charge. It does have power to the regulator full time. Why would that be an issue?