Thread: Anderson plug additon to D90 - (con)fused

Well bugger me that's some good info. Cheers.

Sounds like the alternator is capable of far more current than a little 50A Anderson plug can handle if we pay respect to their tech specs.

On the search to find under what situation an alternator may supply the full 150A, I found an interesting rule of thumb for alternator output relative to battery bank state of charge (relative to Ah):
Maximum alternator output = 50% of discharged capacity.
So a battery bank of say 150Ah, where it has depleted approx 33% (ie 50Ah), would roughly require initial current of 25A to charge, and current would reduce as batteries approach fully charged.

(Read more at Charging rate of alternator)

Looking at the specs of the alternator on the 2.2tdci...
Denso DAN1104 (104210-1510
87 17613 03983 0)
Land rover part CH12-10300-BC
LR029981


Having difficulty finding any further specs from Delco using the part number though... Best I could find is the application guide

Hi Toxic and a suggestion. Give that link the flick. There is just too much misinformation on it.

For example, to claim a battery will draw a specific amount of current is nonsense because the amount of current a battery CAN and WILL draw are controlled by a large number of factors.

An example. I carried out some experiments when I had me D4.

I mounted an Optima D34 55Ah battery, in a low state, ( 11.58v or 20% SoC ) in the rear cargo area, and connected it to the cranking battery via an SC80-LR isolator + 50 amp auto resetting circuit breaker, two 50 amp Anderson plugs ( 1 in the engine bay, 1 at the Optima + 50 amp auto resetting circuit breaker ) and 10m of 6B&S Twin cable temporarily run through the D4.

At start up, the current draw was 63 amps and while this tapered off over the drive, after a 90 minute drive, the Optima was at over 95% SoC.

Now for those with a D4 and one of my kits, where the Optima is less than 1m ( cable distance ) from the cranking battery, via an SC80-LR isolator + 50 amp auto resetting circuit breaker.

If your Optima is as low as that, when you start your drive, the Optima can easily have a startup draw of 100+ amps and will be at 95+% in under an hours drive.

Toxic, the alternator is the same size, the battery is the same size and at the same state of charge, only the cable length is different, yet there is at least a 30% improvement in recharge time. This gives you an idea of how erroneous the info is in that link.

Hi Alien, the alternator is not 80->150A, the reference in that great info you provided, 85/150, is about two different size alternators. an 85 am alternator or a 150 amp alternator.

Thanks for the clarification on that Tim. I try to take everything on the internet with a grain of salt, so good to hear that it's not the most accurate info (I thought it might be suspect, but lacked the knowledge to tell for sure).

Can anyone shed any more light on the 80A/150A alternator?
Are these two different models which are fitted to the 2.2tdci engine? Also interested to know how one would identify which alternator is on their vehicle, and whether a upgrade is a worthwhile modification.

My goal is to have a removable 3rd battery which will be charged by the vehicle's alternator when connected, so seems like Tim's experiment is fairly accurate to what I wish to achieve, and what I am likely to see current wise.

Ours are delivered with 150a versions