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-   -   What fuse needed for a 12v inverter? (https://www.buggiesgonewild.com/showthread.php?t=106302)

jabber82 05-23-2015 10:47 AM

What fuse needed for a 12v inverter?
 
I just bought a 48V CC. The previous owner wired up a 12V inverter with no fuse protection on the 48V side. Anytime I disconnect the power to the battery, I get a spark off the negative side (albeit A LOT smaller than when I wasn't thinking and disconnected the positive side :shock:).

Is a fuse needed on the 48V side? To keep it from sparking everytime I touch the negative terminal, should a toggle switch of some sort be installed?

Nate 05-23-2015 11:22 AM

Re: What fuse needed for a 12v inverter?
 
Hey Jabber82, you raised a few questions.

What wattage is this inverter rated for?

Sparks when you disconnect is not a fuse issue but does raise another question.
Is the inverter ON when you disconnect?

jabber82 05-23-2015 01:35 PM

Re: What fuse needed for a 12v inverter?
 
Inverter is always on as I cannot see an on/off switch on it anywhere. He had it hard wired straight to the 48V battery array. I have no clue on the wattage, it came with that cart. I haven't taken it off to check for a brand.

I am thinking that some sort of fuse will not work as they are designed for a 12V system. Possibly a toggle switch to shut off the positive side?

scottyb 05-23-2015 01:38 PM

Re: What fuse needed for a 12v inverter?
 
These units draw a small amount of power constantly so they should be wired to a 48v relay like you find in a 48v CC charger if they are not a unit designed with a keyswitch or toggle type on/off.

jabber82 05-23-2015 01:54 PM

Re: What fuse needed for a 12v inverter?
 
Thanks Scotty. I watched a video and it shows that there will always be a small spark while the internal capacitor gets its initial charge. But who knows as the guy hooked up the negative then positive side.

scottyb 05-23-2015 03:57 PM

Re: What fuse needed for a 12v inverter?
 
Quote:

Originally Posted by jabber82 (Post 1157970)
Thanks Scotty. I watched a video and it shows that there will always be a small spark while the internal capacitor gets its initial charge. But who knows as the guy hooked up the negative then positive side.

right as long as it is on... not when it is switched. The spark is telling you that it is drawing power ... as in right now as we sit here, drawing power... hence the need for either an internal or external relay or appropriate switch.

Nate 05-23-2015 10:04 PM

Re: What fuse needed for a 12v inverter?
 
Ah, this is a 48 volt to 12 volt DC to DC converter for accessories. I was thinking it was a DC to AC inverter. I would do what Scottyb recommends, the CC solenoid will be more than enough to handle the amperage of this converter and can be hooked up to the cart's 48 volt system. Control the solenoid by a switch or the key.
If you leave if hooked up and store your cart you will come back to dead batteries.

jabber82 05-25-2015 10:09 AM

Re: What fuse needed for a 12v inverter?
 
Makes a ton of sense guys. The previous owner has created a rats nest of wiring and has all the accessories powered by the headlight switch rather than the key. :cussing:

Since I just got approval from the wife about adding in a stereo (which will require a new dashboard of course), I think I am just going to redo all the wiring and make it off the key switch and add in rockers for added future ability.

Scotty, do you have a relay you would recommend (being a seller here?)

scottyb 05-25-2015 10:22 AM

Re: What fuse needed for a 12v inverter?
 
I recommend you purchase the start relay for a club car charger. We do not sell these, they are an OEM part.
We sell a DC reducer with a built-in relay and a key switch activation wire. Thank you for asking

jabber82 05-25-2015 11:15 AM

Re: What fuse needed for a 12v inverter?
 
Scotty and Nate, you guys have been a tremendous help. I feel like I am monopolizing your time. One last silly question. In looking around for a relay, I am coming up with different amp models. I see a 400 amp continuous/1,000 amp peak, 200 cont/800 peak, 100 cont/400 peak. I can't imagine I will ever be looking at adding more than 30 amps to the switched circuit. I think the 200/800 will be just fine. Thoughts?


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