What would be the need for this option?

 

My guess is for ambulance or some other vehicles that may run some serious lighting or possibly tow trucks and winches. Then at low rpm's you could still put out a lot of amperage to re-charge two batteries.

 

If your power draw exceeds your alternator output you will discharge your batteries. Dual alts give you way more capacity for adding on power hungry electrics - I think single alts are around 170 watts - so for a way oversimplified example say you put an auxiliary 300 watt inverter in your truck to hook up the big screen to - without the dual alternators, by the time the game is over your truck battery will be depleted far enough you won't be able to restart.

If you have a camper or trailer, dual alts is a great idea. Or if you tow other toys around that have battery you can charge them as well while driving.

Lots of possibilities.

 

I went with the dual alternators because I was told that the truck takes turns running on one and then the other and then both if required. I figured that it would be a good idea to have both so that if one dies, I still have the other. The dual alternators are a combination of standard duty and heavy duty. Apparently (from what I am told) the truck will use the standard duty alternator (robbing less power) from motor until it requires more juice. It will then switch to the Heavy Duty one and shut off the standard duty one and then if even more power is required it will run both. This comes from a Ford Salesman...

 

was not sure of the whole reason.some I was able to figure out. Planning on a Truck Camper but still am thinking "two problems" ?

 

John, that was exactly what I was thinking when I ordered my truck. One more thing to go out. I did order the extra HD - 200amp alternator though.

 

My truck has the 200 amp alternator. It handles my camper needs just fine.

 

You don't need two for campers or camping, and alternators don't help when the engines not running so you better be starting your engine every quarter if you're watching the game.

 

I am not an electrical expert but I do know that watts = amps x volts. The alternators are about 175 amps, so that is about 2100 watts. So although I don't have a really huge TV I would be surprised if any of them use that much power. My understanding is that these alternators are cold rated I.e. The output drops off as they heat up under use, so that if you actually tested the output it would be much less than the rated 2100 watts. You are quite correct though that the primary use is for heavy draw applications (winches particularly). Personally I don't understand the logic of ordering the heavy duty alternator which is 200 amps (unless the stocker is 155), still it seems more logical to me to order the dual setup.

 

Listen up wise *** he asked what was the use - I gave two examples to illustrate power usage and explained the math. You make a blanket statement about not using them for camping - just go into any park and see how man generators are running...........and seriously are you a machanic feeling the need to tell everyone an alternator don't help when the engines not running. Well duhhh. That was a seriouslypost.

 

I notice on these forums that there seems to be some anger about another reply etc. I think all the answers were opinons and maybe some facts as well.

Let the reader use some discernment in taking advice and make up his own mind.

I appreciate all opinions.

Lets just have some fun and have a group hug!

 

Hers one reason....... http://oasismfg.thomasnet.com/viewit...r-compressors?

<a href="http://s491.photobucket.com/albums/rr272/RotunTuna/?action=view&current=ofc09025.jpg" target="_blank"><img src="http://i491.photobucket.com/albums/rr272/RotunTuna/ofc09025.jpg" border="0" alt="Photobucket"></a>

for........................

<a href="http://s491.photobucket.com/albums/rr272/RotunTuna/?action=view&current=trk009.jpg" target="_blank"><img src="http://i491.photobucket.com/albums/rr272/RotunTuna/trk009.jpg" border="0" alt="Photobucket"></a>

which blows these............

<a href="http://s491.photobucket.com/albums/rr272/RotunTuna/?action=view&current=DSCF0290.jpg" target="_blank"><img src="http://i491.photobucket.com/albums/rr272/RotunTuna/DSCF0290.jpg" border="0" alt="Photobucket"></a>

and fills up these............................

<a href="http://s491.photobucket.com/albums/rr272/RotunTuna/?action=view&current=ofc09021.jpg" target="_blank"><img src="http://i491.photobucket.com/albums/rr272/RotunTuna/ofc09021.jpg" border="0" alt="Photobucket"></a>


and this to help out and not kill my 2 oem batteries................

<a href="http://s491.photobucket.com/albums/rr272/RotunTuna/?action=view&current=trk002.jpg" target="_blank"><img src="http://i491.photobucket.com/albums/rr272/RotunTuna/trk002.jpg" border="0" alt="Photobucket"></a>

Hope this helped!

 

That is one sweet setup!

 

Calling names, EH? You sound pretty tough online pal, well not really, actually you can't spell or compose a sentence so you sound like a dumb a**.

Does that health care cover mental?

 

That was even more lame dude. Seriously, get a life.