Thread: Alternator Capacity

Originally Posted by Blknight.aus

actually, I just read your original post...

I never called you stupid, I just said that sarcasm is my defence against stupid.

I've also just re-read the thread. I mentioned humour in one of my posts towards you (and at the time actually ment it as just that)

The fact that you drew the conclusion that you were called stupid was your own perception.

potentially the most insightful thing you put in this thread. I just regret that the original post was deleted so no-one else can witness you conducting a SPWOSO

Semantics, you know perfectly well that you inferred I was stupid.

What does SPWOSO mean?

DC DC charge couplers started out as a basic way of running 12v items on 24v and 24v items on 12v dc. considering just the running of 12v stuff....

the most basic was little more than a diode rectifier with a ballast on one side to act as a dummy load, good for stuff that didnt require good voltage control (say +/-5v on 12v)

next in line was your basic regulated power supply like the ones that you used to use to charge phones from cars better on voltage regulation not so hot on constant current.

then they went switch mode.

now if you have to jump a major voltage bridge, and you cant faff with your alternator to jig it for freakyness the most efficient way of achieving the change is through a switchmode power supply.

thats why we have them...

DC-DC for 12V charging from an alternator is basically a WOFTAM. your alternator is designed to charge 12v to start with, why not let it do its job directly as opposed to through an additional device that burns up power doing it?

The main basic advantage to DC-DC chargers on 12v is they limit the current flow, great for some types of SLA batteries and allowing you to run smaller cabling because you dont have to shunt the current, but really if you want to do that you just parallel a self resetting circuit breaker and a form of current limiter in series between the positive terminals of the batteries. a little math to pick the size of the breaker and the current limiter ( I normally use a headlight bulb) and ta-ding, you've got a sub $10 steam engine tech current limiting charger Perfect for protecting wiring and slow charging SLA type batteries without removing the max voltage topping ability of the alternator.

Originally Posted by Wilbur

Semantics, you know perfectly well that you inferred I was stupid.

What does SPWOSO mean?

Actually I didnt, I was backing the you're poorly informed or wrong line... thats a leap you made yourself...

SPWOSO...

from MISPWOSO, the Maximillion Institute of Slowly and Painfully Working Out the Surprisingly Obvious

Originally Posted by RRV80

If dc to dc chargers were better at charging, surely a d4 or rrs would already have one lol i have a n70 in the disco that is very old, a very tiny deep cycle which is also old, i use a redarc and never had any problems, and the battery in the van is always charged to, it is run from the second battery, dunno if i have it hooked up right but it works like a treat running 2 fridges all the lights and gizmos in both the car and van

As I have posted, I believe that the D4 most likely does have multi-stage charging. I will advise in due course, if I am not banned.

Please understand that a DC - DC convertor is needed in order to provide multi-stage charging to an additional battery in an aftermarket situation. The important point is that multi-stage charging IS required. The vehicle alternator can be set up (by the manufacturer) to provide multi-stage charging FOR THE CAR BATTERY without the need for a DC - DC convertor. I believe the D4 / RRS will have done this, because LR understand the need for multi-stage charging.

Originally Posted by Wilbur

As I have posted, I believe that the D4 most likely does have multi-stage charging. I will advise in due course, if I am not banned.

Please understand that a DC - DC convertor is needed in order to provide multi-stage charging to an additional battery in an aftermarket situation. The important point is that multi-stage charging IS required. The vehicle alternator can be set up (by the manufacturer) to provide multi-stage charging FOR THE CAR BATTERY without the need for a DC - DC convertor. I believe the D4 / RRS will have done this, because LR understand the need for multi-stage charging.

A whole pile of assertions but no facts!?!?!

We know that D1s and D2s definitely don't have multistage chargers, so why is one suddenly needed for the D3 or D4??? - which despite all the extra electronics isn't all that different.

If a 2nd battery is added, why is a multi-stage charger suddenly needed???

I am starting to believe you might sell these devices???

Wilbur, don’t make yourself a martyr, both Dave and myself work in this field and have had plenty of hands on experience with batteries and how they work.

From your posts and you have stated as much yourself, you base your wealth of knowledge on what you have read, which is mostly advertising hype.

You have also continually posted up info you had misunderstood, as being fact.

What you have not done is post up any info that actually relates to the real world.

Read all you want, but until you actually understand what your reading, and this is not a shot at you, but you continually use info claiming one thing, when it means something totally unrelated, so your replies have to be continually corrected.

A perfect example was your reference to the different voltage setting on battery chargers. You read about it and got it completely wrong.

Again, while you continue to post up erroneous info, it’s going to get corrected.

By the way, D3, D4, RRS and RR alternators all have VARIABLE voltage operations, THIS IS NOT MULTI STAGE CHARGING and the voltage variations are again for something totally unrelated to battery charging, but this still does not stop ALL TYPES of 12v batteries from fully charging.

This is based on hands on experience and loads of feedback from many, MANY customers.

But once again, you have read something and got the reason for why it is done totally wrong.

So if your happy to be sucked in by the advertising hype that is used to sell these devices so be it, but don’t go making out people who own and/or work with these vehicles and see what REALLY happens, don’t know what they are talking about when we explain why the ad hype you have been reading is nothing but BS.

just another thought...

why would you want digitally set staged charging when you could have analog variable charging?.

what happens if you go outside the parameters of the Staged charging system?

I give up. You hurl so much abuse at me that a newbie, Braddo, page 5, comments on it, but when I try to fight back with a little of my own nastiness, you delete my post. You demand that I back up anything I say, yet you do not do so yourself.

This is no longer the forum I thought it was, so I will be leaving and post no more. You can now say what you like about me with no fears that I will respond.