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  #1  
Old 10-16-2016, 10:25 AM
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Need Your Thoughts

Hi Everyone,

I have a 2012 Overland Diesel, currently running an ARB on-board compressor when needed only to re-pump the tyres & a Valentine One Radar while driving.

I purchased some hood mounts that allow me to attach a Curved LED light bar just in front of the windshield.

before I purchase the led bar I have found three that suit the length

1. 300W 52" Curved Led Light bar
2. 500W 52" Curved Led Light bar
3 700W 52" Curved Led Light bar

the car runs @ 14.1V-14.3V while driving. So that means 700W divided by 14v gives me 50Amps which it takes to power the LED bar.

now my question is can my alternator be able to support the 700W led light bar whilst driving with lets say the aircon or the radio on at the same time aswell or would it drain my battery quicker before the alternator can even charge it?

much input will be appreciated and thanks for reading my post.

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  #2  
Old 10-16-2016, 09:01 PM
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Re: Need Your Thoughts

Quote:
Originally Posted by d1driftr View Post
Hi Everyone,

I have a 2012 Overland Diesel, currently running an ARB on-board compressor when needed only to re-pump the tyres & a Valentine One Radar while driving.

I purchased some hood mounts that allow me to attach a Curved LED light bar just in front of the windshield.

before I purchase the led bar I have found three that suit the length

1. 300W 52" Curved Led Light bar
2. 500W 52" Curved Led Light bar
3 700W 52" Curved Led Light bar

the car runs @ 14.1V-14.3V while driving. So that means 700W divided by 14v gives me 50Amps which it takes to power the LED bar.

now my question is can my alternator be able to support the 700W led light bar whilst driving with lets say the aircon or the radio on at the same time aswell or would it drain my battery quicker before the alternator can even charge it?

much input will be appreciated and thanks for reading my post.
Me personally I would go anywhere near the limits of the alternator.
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Old 10-16-2016, 09:38 PM
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Re: Need Your Thoughts

Quote:
Originally Posted by d1driftr View Post
Hi Everyone,

I have a 2012 Overland Diesel, currently running an ARB on-board compressor when needed only to re-pump the tyres & a Valentine One Radar while driving.

I purchased some hood mounts that allow me to attach a Curved LED light bar just in front of the windshield.

before I purchase the led bar I have found three that suit the length

1. 300W 52" Curved Led Light bar
2. 500W 52" Curved Led Light bar
3 700W 52" Curved Led Light bar

the car runs @ 14.1V-14.3V while driving. So that means 700W divided by 14v gives me 50Amps which it takes to power the LED bar.

now my question is can my alternator be able to support the 700W led light bar whilst driving with lets say the aircon or the radio on at the same time aswell or would it drain my battery quicker before the alternator can even charge it?

much input will be appreciated and thanks for reading my post.
Where did you find those mounts??
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Old 10-17-2016, 06:19 AM
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Re: Need Your Thoughts

Hi,

ive have posted the link for the hook brackets;

WK2 Hood Light Bracket 3/16 Aluminum, One Pair

would 50amps be safe on the current alternator?
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Old 10-17-2016, 08:37 AM
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Re: Need Your Thoughts

Am I understanding this correctly... you want to mount a 52" light bar across the back edge of your hood using two of those aluminum hood brackets?

If so, I think you're going to have more issues than whether or not your alternator can support the electrical load.

Not sure what size alternator is on your 12... on my 16 it's 180A. Looking at the fuse size table on my 16, I see the largest circuit is 60A for the radiator fan, there are several 30-40A circuits and the vast majority are in the 15-25A range. In particular, all of the power outlet fusing is a max of 20A.

Not saying that it can't be done but I'd be a little leery about adding any kind of 50A accessory load to that.
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Old 10-21-2016, 11:17 PM
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Re: Need Your Thoughts

holy effing sh!t did you say 50 amps for an LED light bar ?!! does this thing light up Death Valley at Clemson ?? Thats hell of alot of amps for any accesory, esp LEDs. It will be pretty amazing, but I would not think factory system would have an extra 50amps in capacity. I guess plug it in, idle with accesories on and measure battery voltage. wait for the rad fans to kick in, make sure you arent less than 13 v
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Old 10-22-2016, 08:47 AM
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Re: Need Your Thoughts

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holy effing sh!t did you say 50 amps for an LED light bar ?!! does this thing light up Death Valley at Clemson ?? Thats hell of alot of amps for any accesory, esp LEDs. It will be pretty amazing, but I would not think factory system would have an extra 50amps in capacity. I guess plug it in, idle with accesories on and measure battery voltage. wait for the rad fans to kick in, make sure you arent less than 13 v
You bring up a very good point. I think maintaining proper voltage would be more critical to the vehicle's various electrical modules. One only needs to look at any software related TSB and the standard warning about not allowing voltage to drop when doing an update. It makes me wonder what could potentially happen with a voltage drop during normal operation.
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Old 10-22-2016, 10:08 AM
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Re: Need Your Thoughts

People set up 30-50amp/max independent circuits all the time for stereo applications. Depending on what brand it can go both ways, with a quality bar the draw will be consistent, cheap light bars can draw ridiculous power and barely put out light near advertised specs. Bars range from what $100-$2200. These bars run on any voltage within range LEDs aren't super sensitive. 50amps is huge for an LED bar, Rigid lists their 50" at 21amps and ~300w but they're good watts, eBay has 50" bars up to 700w that honestly don't equal a 20" quality piece and draw twice the power. I've installed both and won't touch a cheap bar, it's not worth the effort, except for looks.

Most bars only get turned on to show friends or used for maybe 3-5 minutes at a time "off road"? Not being funny but if you're not in the lead lighting isn't all that useful. Those brackets are not intended for that weight or lateral force but should be okish for your idea, I like the look but it's a bad place for lighting, especially with poorly focused bars, compare them if you can.

There are several nice alternator upgrades available if you have the base one, right up to monster 280-400amp units.

Please posts pics I'm stoked to see it.
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Old 10-22-2016, 02:12 PM
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Re: Need Your Thoughts

stereo setups arent drawing that continuously its just for a split second when the bass drops. they also uses caps for that, to prevent voltage drop in the system for momentary spikes in power draw.

how hot would a continuous 50amp draw make those LED's? what size wire would you use ? Be very careful with this, people torch there cars everyday with wiring big current draws. I would definitely look into high quality set up and add a factor of safety to your wire gauge to run this much draw. Another thing to remember is the alternator may work for a while as is, but if you ran the lights for any period of time you will be stressing it, i would expect it to fail after not too long
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