Durst 25 amp 3 stage charger

Submitted: Wednesday, May 02, 2007 at 20:22

ThreadID: 45027 Views:2999 Replies:4 FollowUps:12

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greggu

hi there - interested to note some comments suggesting the Durst 25 amp etc Chargers may not be a true 3 stage charger - as i do have one on the KK charging up 4 x 35 amp exide agms and 1 x 100 amp tech agm batts in total = 240 amps.
so is the comment that the durst 3 stage charger is not a true 3 stage charger factual or is it simply someones uneducted opinion or a competitors rant -
be interested to know because it seemed good value for money at the time i bought it in mid 2004
my thanks greg

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Reply By: Derek from Affordable Batteries & Radiators - Wednesday, May 02, 2007 at 20:27

Wednesday, May 02, 2007 at 20:27

Hi Greg

It is 3 stage.

Also take note that the Jaycar unit is not 4 stage.

Regards

Derek.

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AnswerID: 237502

Follow Up By: greggu - Wednesday, May 02, 2007 at 20:30

Wednesday, May 02, 2007 at 20:30

thanks derek how goes it
see you greg

FollowupID: 498529

Follow Up By: Derek from Affordable Batteries & Radiators - Wednesday, May 02, 2007 at 20:36

Wednesday, May 02, 2007 at 20:36

Hi Greg

Yes I am well Thank you.

You can't always believe things that are started in a tread.

I buy from Durst and their chargers a great and their service is exceptional.

Regards

Derek.

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FollowupID: 498537

Follow Up By: greggu - Wednesday, May 02, 2007 at 20:47

Wednesday, May 02, 2007 at 20:47

thansk derek
i agree you see some absolute rubbish at times paricualrly on nissan 3.0 l tds
see you greg

FollowupID: 498547

Reply By: Outa Bounds - Wednesday, May 02, 2007 at 20:38

Wednesday, May 02, 2007 at 20:38

You're probably reading my rather confused post.

The EPS 1214 states a "2 stage charging cycle".

I thought the Durst looked similar in the specs having the boost and then float, but reading the rest of the info it has three stages: Bulk, Absorption and Float.

I have read in archived posts something about not all so called Smart Chargers not really being true three stage chargers but that probably didn't apply to ones like the Durst.

If you got yours in 2004 and your batteries are still all good then I guess it's been doing a good job.

AnswerID: 237514

Follow Up By: greggu - Wednesday, May 02, 2007 at 20:45

Wednesday, May 02, 2007 at 20:45

ok thanks - and yep all my batts are fine i had a calcium 80 amp in the kk originally with the 4 x 35 agms but its now the aux batt in the patrol put it in when my exide extreme died and i picked up a amp tech from derek recently to put in the kk which seems fine
see you greg

FollowupID: 498546

Follow Up By: Gronk - Thursday, May 03, 2007 at 08:59

Thursday, May 03, 2007 at 08:59

Hello Greg, I also have a KK (4 x 35ah batts running an absorbed power 10A switch mode charger )

Did you put the 100ah in the same batt holder as the 35ah exides ?? ( mine are in the holder under the top of the bed, assume yours is the same )

FollowupID: 498655

Follow Up By: greggu - Thursday, May 03, 2007 at 10:17

Thursday, May 03, 2007 at 10:17

gronk my kk was a special build order on the kk factory in early 2004 and was pretty much the first of the KK classic mariners when the mariner bits became an add on pack by kk and it has a large battery box mounted on the front under the ob carrier where the 100 amp amp tech is - my 4 off 35 amps are mounted in two ss side carry boxes and i have the older style rectangular front storage box with the stove mounted low in it
i then upgraded the old style 4 amp charger supplied at that time by kk to a 20 amp durst 3 stage charger which i mounted in the same place and upgraded what wiring i could easily get to as needed - it all seems to work ok but some of the existing wiring may be a bit small for the 20 amps not quite sure about that
my best greg

FollowupID: 498670

Follow Up By: Gronk - Thursday, May 03, 2007 at 13:02

Thursday, May 03, 2007 at 13:02

Ahh, completely different......I have only recently upgraded from 2 x 35ah to 4 x 35ah, but should have gone the whole hog and added another two, giving a total of 210ah.....which is the max that will fit under the bed !

The wiring SHOULD be OK, as all the models are wired the same except for the extra acc needed on the dearer ones..including the batt cables..

My 10A charger will still charge up to 220 ah, but obviously will take longer than a bigger one, but that doesn't matter as its usually at home when it gets charged !!

I had two side storage boxes made up out of aluminium checkerplate ( same as the stainless originals ) and use them to store all the tent pegs, guy ropes, hammer etc !!

FollowupID: 498697

Reply By: Granpa Joe - Wednesday, May 02, 2007 at 22:30

Wednesday, May 02, 2007 at 22:30

It looks like not everyone was happy with what was said in
Post: 44959 ":)

The best thing to do when purchasing a product is to do your own research, not listen to biast opinions and choose wisely upon your requirements.

If the charger has three stages of operation in it's functionality then there advertising is justified.

AnswerID: 237558

Follow Up By: greggu - Thursday, May 03, 2007 at 10:22

Thursday, May 03, 2007 at 10:22

thansk granpa joe
yes you have to sort the sensible stuff from the garbage on the forum i agree the trouble is some of the people who answer may be about 12 years old mentally and have read one or two 4wd mags so they become instant experts - but then there is usually one or two who answer who do appear to know there stuff and provide really good advice at times
see you greg

FollowupID: 498671

Reply By: Robin - Thursday, May 03, 2007 at 09:52

Thursday, May 03, 2007 at 09:52

Hi Greg

There is confusion in the terms and no universally accepted definition and marketing has run with it.
Thats the main problem - and then the term smart charger is added to makes things harder.

In other circles you see better definitions based on use of terms like IUI or IUOI
these are more internationly accepted.

Perhaps we could have a thread that better defines this in say an exploroz context.

Most of non basic chargers are 3 stage.

The stages are

1/ constant current initially (voltage rising )

2/ Constant voltage (main charge )

3/ Step down to a holding voltage.

There are further variations to the above -

The term smart or perhaps in your case "true" 3 stage tends to apply
when the charger senses in the first or other stages that there has been a drop in current and changes its voltage
(in some units initial voltage for constant current is lower)

Really smart units have overiding time switches and temperature measurement elements.

Note - Before we get into a definition war - the above is not a full definition - just a simplistic overview to give the idea

If Derek or someone could point us to the full Durst document then we could see more clearly the stages it uses.

Robin Miller

Robin Miller

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AnswerID: 237616

Follow Up By: greggu - Thursday, May 03, 2007 at 10:09

Thursday, May 03, 2007 at 10:09

thanks robin obviously you are trained in this area and know your stuff i guess what i want is a good charger that wont stuff the batteries if left plugged in for a day or two or more and the durst seems to do that - so its probably ok value for the money - i have no doubt the ctex and other more expensive chargers are probably more technologically advanced but do we really need that much techo and hence justifiably pay the extra dollars for them - not sure about that
see you greg

FollowupID: 498668