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[Mr Skrunts]

Right, I am thinking of adding one of these to the battery, allthough the leads will need extending  I want to fit the CTRK coupler somewhere on the out of the body.

Any suggestions where to fit it?  Reason for this is the car is parked of for weeks on end and rather than struggle opening the car looks I can just plug the charger in and use the remote., front grill is one option I was thinking of, annother was modifiying a trailer plug as I believe there is a constant live on it,

You said you were fitting a .... http://www.power-chargers.com/media/catalog/product/cache/1/image/5e06319eda06f020e43594a9c230972d/5/6/56-380_full_500.jpg which is just the same but with a led version of a volt meter  :-/

I did but that was for inside the car, this idea is for fitting on the outside of the car.

[Andy B]

Right, I am thinking of adding one of these to the battery, allthough the leads will need extending  I want to fit the CTRK coupler somewhere on the out of the body.

Any suggestions where to fit it?  Reason for this is the car is parked of for weeks on end and rather than struggle opening the car looks I can just plug the charger in and use the remote., front grill is one option I was thinking of, annother was modifiying a trailer plug as I believe there is a constant live on it,

You said you were fitting a .... http://www.power-chargers.com/media/catalog/product/cache/1/image/5e06319eda06f020e43594a9c230972d/5/6/56-380_full_500.jpg which is just the same but with a led version of a volt meter  :-/

I did but that was for inside the car, this idea is for fitting on the outside of the car.

so you'd have a choice of 2 charging points   

[KW]

I have a Ctek XS3600 battery charger. If you have 2 batteries that are charged I would think that something similar would be able to maintain a charge on 2 in parallel.

So long as you remember to double up on the current as well as take one or two other things in to account (such as resistance, impedance, Ah ratings, etc)

do the maths then ...  you're the spark ....

I'll do the math in 5 seconds flat once I know the specs of the battery/batteries.

 ....... ask Skruntie

As you were the one who originally suggested that I do the math, why don't you go fetch those figures for me and then report back (along with a tea + 2) 

[Andy B]

I have a Ctek XS3600 battery charger. If you have 2 batteries that are charged I would think that something similar would be able to maintain a charge on 2 in parallel.

So long as you remember to double up on the current as well as take one or two other things in to account (such as resistance, impedance, Ah ratings, etc)

do the maths then ...  you're the spark ....

I'll do the math in 5 seconds flat once I know the specs of the battery/batteries.

 ....... ask Skruntie

As you were the one who originally suggested that I do the math, why don't you go fetch those figures for me and then report back (along with a tea + 2) 

why tell me about resistance etc then?

reporting to you? :-? ........ it was 20+ yrs ago since I last reported anyone

[Mr Skrunts]

Am now the proud owner of of one of these chargers.   

Batteris are either 065 or 063 cant remember exactly, Either way they would be what I was told on here before they were bought.  One is supplied by Vx and is a Vx Go battery.

Just dug the reciept out for the other, is a 065 with 2 year warranty with just happened to run out on the 12th April.  :-/

[Mr Skrunts]

Also worth a mention.

www.scparts.co.uk who supplied the charger, allthough I used thier link on ebay. 


[edit]
http://www.scparts.co.uk/index/lang-2/lkz-195/kat-173,actmenu-173,functiontpl-markenwelt.tpl.htm[/edit]

[Andy B]

Am now the proud owner of of one of these chargers.   

Batteris are either 065 or 063 cant remember exactly, Either way they would be what I was told on here before they were bought.  One is supplied by Vx and is a Vx Go battery.

Just dug the reciept out for the other, is a 065 with 2 year warranty with just happened to run out on the 12th April.  :-/

Just connect it up, it'll be more than OK.     

KW just wanted to let us all he knew V=IR etc

[Kevin Wood]

Just connect it up, it'll be more than OK.     

The only slight issue being that these smart chargers sometimes have a timeout on the constant current phase so that if the battery voltage hasn't recovered after a given number of hours they declare a knackered battery.

This limits the capacity of battery they can reliably charge from dead.

If that happens, of course, you can just disconnect the charger and reconnect and give it another shot at it.

Kevin

[Andy B]

...
The only slight issue being that these smart chargers sometimes have a timeout on the constant current phase so that if the battery voltage hasn't recovered after a given number of hours they declare a knackered battery.

This limits the capacity of battery they can reliably charge from dead. .....

Agreed. The desructruction manual for my CTek3600 says that my 110 A caravan battery is on the limits of its range for that reason.   

[KW]

Am now the proud owner of of one of these chargers.   

Batteris are either 065 or 063 cant remember exactly, Either way they would be what I was told on here before they were bought.  One is supplied by Vx and is a Vx Go battery.

Just dug the reciept out for the other, is a 065 with 2 year warranty with just happened to run out on the 12th April.  :-/

Just connect it up, it'll be more than OK.     

KW just wanted to let us all he knew V=IR etc

065 = 55Ah
Two of those in parallel = 110Ah - which is 35Ah more than what the Ctek charger can handle in charging mode.

[Andy B]

Am now the proud owner of of one of these chargers.   

Batteris are either 065 or 063 cant remember exactly, Either way they would be what I was told on here before they were bought.  One is supplied by Vx and is a Vx Go battery.

Just dug the reciept out for the other, is a 065 with 2 year warranty with just happened to run out on the 12th April.  :-/

Just connect it up, it'll be more than OK.     

KW just wanted to let us all he knew V=IR etc

065 = 55Ah
Two of those in parallel = 110Ah - which is 35Ah more than what the Ctek charger can handle in charging mode.

Assuming that they are both fully discharged. Somewhere towards the beginning of the thread it was suggested that Skruntie was after maintaining the charge on his two batteries in parallel. My CTek 3600 has no problems with 110A leisure battery in maintenance mode.
There are bigger CTek chargers though.

[Andy B]

.....
065 = 55Ah
Two of those in parallel = 110Ah - which is 35Ah more than what the Ctek charger can handle in charging mode.

Anyway .... Ctek doesn't agree with you
http://www.ctekchargers.co.uk/ctek-xs3600.php


CTEK XS3600 Specification
Charging voltage - 12V
Sulphated battery recovery - Yes
Bulk charge rate - 0.8A/3.6A
Peak charge with minimal fluid loss - 14.4V/14.7V
Pulse maintainance for maximum battery life - Yes
Current ripple (%) - 3%
Back current drain (Ah/month) - <1
Minimum battery current rating - 1.2Ah
Maximum battery current rating (charging) - 75Ah
Maximum battery current rating (maintainance) - 120Ah
Dimensions (LxWxH) - 165x61x38mm
Weight - 0.5kg
Insulation - Splash and dust-proof
Quick coupling - Yes

[KW]

.....
065 = 55Ah
Two of those in parallel = 110Ah - which is 35Ah more than what the Ctek charger can handle in charging mode.

Anyway .... Ctek doesn't agree with you
http://www.ctekchargers.co.uk/ctek-xs3600.php


CTEK XS3600 Specification
Charging voltage - 12V
Sulphated battery recovery - Yes
Bulk charge rate - 0.8A/3.6A
Peak charge with minimal fluid loss - 14.4V/14.7V
Pulse maintainance for maximum battery life - Yes
Current ripple (%) - 3%
Back current drain (Ah/month) - <1
Minimum battery current rating - 1.2Ah
Maximum battery current rating (charging) - 75Ah
Maximum battery current rating (maintainance) - 120Ah
Dimensions (LxWxH) - 165x61x38mm
Weight - 0.5kg
Insulation - Splash and dust-proof
Quick coupling - Yes

[Marks DTM Calib]

An intelligent charger will not reliably fully charge 2 batteries connected in parralel

[Andy B]

An intelligent charger will not reliably fully charge 2 batteries connected in parralel

I'm quite willing to listen  ........ what's the difference between two in a parallel & one bigger capacity battery, as far as charging them is concerned?