CRD alternator output

805gregg · **Posted:** Tue Jul 24, 2007 10:24 am

Anyone know the alternator output on a CRD?

flash7210 · **Posted:** Tue Jul 24, 2007 10:42 am

Should be the same as any other alternator. Usually regulated at 14-18
VDC depending on load. Anything less than 14 volts is bad.
Test with all lights on + radio + A/C and engine at 1000-1200 RPM.

DarbyWalters · **Posted:** Tue Jul 24, 2007 10:53 am

I thinkg he is asking about "AMPS"...I know the "Renegade" had a 165 amp I think.

spoonplugger1 · **Posted:** Tue Jul 24, 2007 11:15 am

The part number on our alternator isn't listed with Denso. The standard gas Liberty alternator is 140 amps with a 160 amps optional alternator.
120-4241 is the part number on our alternator.

DZL_LOU · **Posted:** Tue Jul 24, 2007 12:18 pm

DCX part number is 56044672AA for the diesel and is rated at 136 Amps for the diesel.

DarbyWalters · **Posted:** Tue Jul 24, 2007 12:55 pm

I know that if I have my lights on and roll down/up a window, the lights dim...wish we had higher rated Alternator.

ATXKJ · **Posted:** Tue Jul 24, 2007 1:02 pm

This is on my upgrade list
http://c-comp.com/product_info.php?products_id=243

impulse · **Posted:** Tue Jul 24, 2007 8:37 pm

Your upgrade site doesn't even give the output. If you want amps check this site. I don't know if the Liberty is series 23 or 24. These units can give continuous amperage and require heavier cables.
The site also shows isolator wiring.

http://www.emarineinc.com/index.html

travelndog · **Joined:** Sun Dec 04, 2011 5:38 am **Posts:** 9

I just found this site cause I was curious as to the Amp output of the alternator of my 2006 Liberty CRD. I knew it was well over 100 amps but I had no idea that it was so high.....

I am in Los Angeles and just this past week we experienced freakishly severe higher than normal "Santa Ana" winds. (For those of you not familiar with So Cal, we occasionally get a condition in this region known as the "warm high pressure Santa Ana winds" (Originally Known As: "Santana Winds") that travel south west at high speeds from the north eastern desert region through the mountain passes and into the Southern California basin) For the first time in half a century or more, the winds peaked out with gust of over 100MPH in some places. Needless to say, there was much damage and numerous power outages that started at about 11pm-ish Wednesday night (11/30) to present (Sunday morning 2:07am 12/4).

http://www.cbsnews.com/8301-501363_162- ... ews.com%29

http://www.seattlepi.com/news/article/F ... 337301.php

Last reports were that over 72,000 were left without power for 48 hours or more. I just happened to be one of those households. So I went to the nearest Home Depot to buy a generator just to find that they had sold out on everything from flashlights to generators. Infact, all the Home depots within a 10 mile radius was pretty much sold out including Lowes and OSH. Well I decided to go a different route by going to Fry's Electronics and buying a 5,ooo watt inverter, hooking it up to my 2006 CRD and connecting the inverter to the power panel of my house (ofcourse after switching off the main breakers to disconnect from the main Grid). I think I was the only house within several blocks to have emergency power for my Fridge, tankless water heater (requires electricty to function), and my precious 170 gallon Koi aquarium. I have always known that Diesels can be amazing power plants and the fact that I can sit here typing on my computer with full internet access while all my surrounding neighbors are reliving the stone ages, proves it. One funny thing is that one of my neighbors called me on my cell phone to tell me that I had left my Jeep running in my driveway for the past day and a half. He's know thinking about buying a Diesel pickup.... I'm just amazed as to how long one can idle a full 20.5 gallon tank of fuel. I love my CRD!!!!

yrkcrd · **Posted:** Sun Dec 04, 2011 10:10 pm

There is a company called mean green that has a 200 Amp alternator for our CRD's

The part number I got from them is MG11114 and they say it is a drop in replacement.

It is also $399

travelndog · **Joined:** Sun Dec 04, 2011 5:38 am **Posts:** 9

Here's another aftermarket amp that boasts 220 amps at only 1,200 RPM:

http://powerbastards.com/proddetail.asp ... itzall-220

...and check this little toy out:

http://www.premierpowerwelder.com/

usa591 · **Posted:** Mon Dec 05, 2011 3:00 am

travelndog: you are my hero.

Here in Culver City, I felt pretty smug with my Honda i2000 until I read your post.

tregrrr · **Joined:** Mon Oct 10, 2011 2:37 pm **Posts:** 59

hey if you guys are looking at the big sustained duty alternators, PLEASE consider also upgrading the primary wire and do a dedicated negative all the way back to the battery, not relying on chassis grounding

Them marine alternators are my field (installations) and I know that the Balmar Marine ones are solid, and are designed to work primarily with the 'smart' regulators of the marine charging systems. those turn these 12v alternators into serious power generating units I have one i built that will push 400a of 12v (2x200a leece nevilles) all week if you want it to.

Give yourself a ground line and beef up the Positive leads. I haven't looked at ours but I do not have to since they are all the same. small. Copper is expensive and the Beancounting Factory designs automotive electrical systems to tickle charge the OEM battery and run a nominal 1200w load of all lights, HVAC, and heated seats... but not mucch more and definitely not for any sustained period of time for the big aftermarket alts, I would gauge that wire at #1ga or preferably larger based upon being in an engine bay and 208a being the absolute max that should be carrying with 105C rated insulation.

As for sustained inverter use... be careful with small wires things like this can happen without fuses or enough copper:http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=63494&

yrkcrd · **Posted:** Mon Dec 05, 2011 9:23 am

Great point about the power and ground wires.

travlndog I think that they ones that you found are universal fit, where the one I found from mean green was a direct replacement.

geordi · **Posted:** Mon Dec 05, 2011 12:54 pm

travelndog wrote:

I just found this site cause I was curious as to the Amp output of the alternator of my 2006 Liberty CRD. I knew it was well over 100 amps but I had no idea that it was so high.....

I am in Los Angeles and just this past week we experienced freakishly severe higher than normal "Santa Ana" winds. (For those of you not familiar with So Cal, we occasionally get a condition in this region known as the "warm high pressure Santa Ana winds" (Originally Known As: "Santana Winds") that travel south west at high speeds from the north eastern desert region through the mountain passes and into the Southern California basin) For the first time in half a century or more, the winds peaked out with gust of over 100MPH in some places. Needless to say, there was much damage and numerous power outages that started at about 11pm-ish Wednesday night (11/30) to present (Sunday morning 2:07am 12/4).

http://www.cbsnews.com/8301-501363_162- ... ews.com%29

http://www.seattlepi.com/news/article/F ... 337301.php

Last reports were that over 72,000 were left without power for 48 hours or more. I just happened to be one of those households. So I went to the nearest Home Depot to buy a generator just to find that they had sold out on everything from flashlights to generators. Infact, all the Home depots within a 10 mile radius was pretty much sold out including Lowes and OSH. Well I decided to go a different route by going to Fry's Electronics and buying a 5,ooo watt inverter, hooking it up to my 2006 CRD and connecting the inverter to the power panel of my house (ofcourse after switching off the main breakers to disconnect from the main Grid). I think I was the only house within several blocks to have emergency power for my Fridge, tankless water heater (requires electricty to function), and my precious 170 gallon Koi aquarium. I have always known that Diesels can be amazing power plants and the fact that I can sit here typing on my computer with full internet access while all my surrounding neighbors are reliving the stone ages, proves it. One funny thing is that one of my neighbors called me on my cell phone to tell me that I had left my Jeep running in my driveway for the past day and a half. He's know thinking about buying a Diesel pickup.... I'm just amazed as to how long one can idle a full 20.5 gallon tank of fuel. I love my CRD!!!!

I use my CRD as a power source on film sets, and for reference: It will idle at about 1 quart per hour, with the A/C running. I am a film master electrician, and I am concerned about your inverter however. You say you bought a 5kw inverter, that equals a 416 amp draw IF you are pulling full power from it. Is that a steady rating or a surge rating? How much power are you ACTUALLY pulling from it?

The reason I ask is because you might be getting most of the power you need from the alternator, but the battery will be supplying the rest. At some point, your CRD is not going to get the power it needs to continue running, and your engine will stop. Then you are in the dark ages too. I wouldn't run any heater off the inverter, they use an ENORMOUS amount of power. Most people are unaware that even something as small as a coffee maker will usually pull around 1200 watts, more than many large film lights!

You can determine your total watt draw from adding each device up. They should all have a sticker with one of these ratings on it, near the power cable: Watts or Amps. You already know the voltage (120v) for the device, so here is the equation to convert: Watts = Volts Times Amps. W=VA
Watts never change, but amperage changes inversely to voltage. So at 120v, that 5000 watt inverter is capable of driving 41 amps. Yea... Doubtful!

Your standard electrical outlet on the front of that unit and the standard extension cord would MELT under that much amperage. Trust me, I've seen people on films do it with as little as 2000 watts through a cord.

Be careful, be safe. I'd be happy to answer any questions you might have in setting this up for the future. FYI: For our 136 amp alternator, (putting out 12v) your limit is 1632 watts... And that will be the SAME wattage at 120volts too. Anything more, and you are scavenging from your battery and on borrowed time.

tregrrr · **Joined:** Mon Oct 10, 2011 2:37 pm **Posts:** 59

geordi wrote:

I use my CRD as a power source on film sets, and for reference: It will idle at about 1 quart per hour, with the A/C running. I am a film master electrician, and I am concerned about your inverter however. You say you bought a 5kw inverter, that equals a 416 amp draw IF you are pulling full power from it. Is that a steady rating or a surge rating? How much power are you ACTUALLY pulling from it?

The reason I ask is because you might be getting most of the power you need from the alternator, but the battery will be supplying the rest. At some point, your CRD is not going to get the power it needs to continue running, and your engine will stop. Then you are in the dark ages too. I wouldn't run any heater off the inverter, they use an ENORMOUS amount of power.

**snip**

Be careful, be safe. I'd be happy to answer any questions you might have in setting this up for the future. FYI: For our 136 amp alternator, (putting out 12v) your limit is 1632 watts... And that will be the SAME wattage at 120volts too. Anything more, and you are scavenging from your battery and on borrowed time.

X2
I was (had actually typed it in then deleted it) going to say something about storage capacity too. I took the 5kw with a grain of salt since I see wild claims from some less reputable manufactures... chaulked that up as a 10ms surge rating or something that might look sexy on the box.

As a power supply automotive regulators do exactly what we want of them: they attempt to provide a float (constant) voltage where the average lead-acid battery will happily sit all day long and not boil dry. Unfortunately the charge absorption at float voltage is trivial beyond 75% full. This is where the old adage that you have to drive around 1000 miles to charge up a battery fully from dead comes from. Without a proper "smart" regulator, the 136a alternator will not deliver 136a into the battery. It will supply a load of 136a for as long as the light duty wiring or internals in the alternator last, but will only put maybe 10a into a 50% charged battery and 5a in at 75% full and trickle the rest of the way over 10 hours running time. So with our 5kw inverter running the little lady's blow dryer, curling iron, coffee brewer and make-up lights... we have the potential to drain off the starting battery rather quickly (a nearly 300a deficit will do that in minutes) with quite limited recovery capability.

So as geordi said be careful of sustained loads: the alternators I use to supply sustained 110a 12v charging weigh about 3x as much as the ones in our CRDs. The battery banks I use weigh about 10x... these are what is required to support sustained high load inverters (2.8kw) and stay in the 12v realm.

But then again once the starting battery is run down lower than our engine management is willing to accept, then there is not much more damage to do except nailing shut the coffin on that dead battery by sucking the last ounce of the life out of it and not charging back for a few days...but even then the old red tops are pretty resilient.

CRD alternator output

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