Carthago Split Charging Unit (2 Viewers)

[the1andonly]

Not sure about extending temperature sender, probably best to check with manufacturer. My B2B is next to the Li battery so I have not experienced this problem. Extending the D+ feed may be easier.

Thanks
The distance from CBE 300 is ok for temp sensor, the solar controllers are up in a cupboard next to roof ie 2m down then another 2m across floor to battery box. Finding room for 2 will be fun, maybe flat ontop of inverter. That is if i wish to keep space for a 2nd battery (today i dont need it but tomorrow!)

 

[paddymcc]

Thanks
The distance from CBE 300 is ok for temp sensor, the solar controllers are up in a cupboard next to roof ie 2m down then another 2m across floor to battery box. Finding room for 2 will be fun, maybe flat ontop of inverter. That is if i wish to keep space for a 2nd battery (today i dont need it but tomorrow!)

I emailed Votronic about their temperature sensors and they replied to my query within a couple of days. info@votronic.de

 

[Ian Bosman]

I'm exploring the possibility of putting a B2B charger on my Carthago, but I understand that I'll need to disable the existing split charging unit. Does anybody know where it is? Is it a separate unit, or is it built into the electronic gubbins in the boot? I can't even identify a fuse for it. Is it likely to be an ordinary automotive fuse, or one of the midi fuses which are attached to the multi-connector that is on the +ve of the vehicle battery?

It's a Carthago 5.5XL but I think the electrics are the same on all the 'A' classes. Electronics are CBE

Might even consider a Votronic triple unit (mains/B2B/solar), although they're a bit expensive.

Thanks in advance.

If yours ICBE then you most likely have a beige box near to the charger unit with a load of fuses at the top being a cover. The bit below is where there relays are. Attached is the info from Marcle Leisure who supply the units. the attached also includes a description of the bits inside.

 

[the1andonly]

I mailed roadpro today and got a responce within the hour.
Hello Mr Smith

The Votronic 2001 Temperature sensor - our part number C0325 is for use with Votronic parts including the MPPT regulators, they only come with a 3 Mtr length as the regulator/charger etc should be situated near the battery they are connected to.

The B2B charger 1212-30 our part number C85065 does come with a Temperature sensor in the box and must be used if connecting to a Lithium battery.

So there's my answer.
Run new cables from the roof down to the box and put controllers next to battery mounted horizontally on a platform above the inverter.

 

[G7UXG]

If yours ICBE then you most likely have a beige box near to the charger unit with a load of fuses at the top being a cover. The bit below is where there relays are. Attached is the info from Marcle Leisure who supply the units. the attached also includes a description of the bits inside.

Thanks, a useful manual that I’ve not seen before.

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[the1andonly]

Its in the resources area

 

[Pausim]

In recent CBE systems the separation relay is usually built into the circuitry of DS300 unit. The picture is taken from the manual. The relay is marked as 1 in the picture and the resistor that can be removed is shown at 2. I did not want to permanently disable the function so I left the resistor in place and added a additional normally closed relay to the B1 connection.

Edit. Sorry photograph did not load.

 

[Pausim]

Missing picture from my previous post.

 

[Lenny HB]

That resistor is not actually a resistor it is what is known as a zero ohm link, so if you cut it you can just replace it with a wire link.

 

[Pausim]

That resistor is not actually a resistor it is what is known as a zero ohm link, so if you cut it you can just replace it with a wire link.

That is interesting and useful, I might well have done things differently had CBE explained this. It looks like there was originally a switch there because the board is marked with on and off.

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[AgeingAndrew]

There is a wiring diagram on 12Voltplanet called 'Guide for fitting B2B charger with DS300' which shows how to connect a B2B to a CBE DS300. Although it shows a Stirling B2B it could be easily adapted for other chargers.

Link below

12VoltPlanet B2B charger with CBE DS300

 

[the1andonly]

Until the last 3 posts i was ready to put a 100a issolator at b2 on when mains charging off at all other times ( engine running).
Mine is 2017 non smart alternator
Lenny HB Pausim
Is the alternative replace the short R37 with a switch used in same way as the issolator.

 

[Lenny HB]

Until the last 3 posts i was ready to put a 100a issolator at b2 on when mains charging off at all other times ( engine running).
Mine is 2017 non smart alternator
Lenny HB Pausim
Is the alternative replace the short R37 with a switch used in same way as the issolator.

If your B2B has ignition feed switching you can connect that to the D+ so it only turns on when the alternator is running, won't do any harm to fit the relay for belt & braces.

 

[the1andonly]

If your B2B has ignition feed switching you can connect that to the D+ so it only turns on when the alternator is running, won't do any harm to fit the relay for belt & braces.

When it arrives i will be using a votronics 1212-30 ( has d+ will connect to cbe item 12 on diag)

 

[Pausim]

Until the last 3 posts i was ready to put a 100a issolator at b2 on when mains charging off at all other times ( engine running).
Mine is 2017 non smart alternator
Lenny HB Pausim
Is the alternative replace the short R37 with a switch used in same way as the issolator.

I have used a D+ activated normally closed relay at B1, the engine battery terminal. The relay opens when the engine is running to separate the engine battery from the leisure battery.

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[the1andonly]

I have used a D+ activated normally closed relay at B1, the engine battery terminal. The relay opens when the engine is running to separate the engine battery from the leisure battery.

I read your post about this and at the beginning you concidered an issolator. I have used the mains charger very rarely. (Only once intentionally) I may dissable it totaly and just use the lithium charger that came with the battery. Need to read up first.

 

[Pausim]

I read your post about this and at the beginning you concidered an issolator.

I don’t recall the context of my reference to an isolator. Not something I considered seriously as an alternative when wiring my B2B. Can you point me at my post, I may just have explained something badly.

 

[the1andonly]

Whoops
May have been some one else.
Sorry

I don’t recall the context of my reference to an isolator. Not something I considered seriously as an alternative when wiring my B2B. Can you point me at my post, I may just have explained something badly.

Whoops
May have been some one else.
Sorry
Mind and body willing if not always able.
Any way is there a reason i shouldn't use an issolator on b1. Normally off only on when i need to charge ( will also turn charger off)

 

[Pausim]

Whoops
May have been some one else.
Sorry

Whoops
May have been some one else.
Sorry
Mind and body willing if not always able.
Any way is there a reason i shouldn't use an issolator on b1. Normally off only on when i need to charge ( will also turn charger off)

It ought to separate the batteries the same as a relay, just has to be done manually.

 

[JockandRita]

It ought to separate the batteries the same as a relay, just has to be done manually.

But would it still allow a charge to the cab battery from the mains or solar, once the engine was turned off Paul?

Cheers,

Jock.

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[Pausim]

Not sure how your solar is wired but the mains trickle charge to B1 should be ok as long as you turn the battery back on.

 

[JockandRita]

Not sure how your solar is wired but the mains trickle charge to B1 should be ok as long as you turn the battery back on.

That's what I thought Paul, ie, the manual switch would isolate continually in the off position, whereas your relay would only isolate whilst the alternator (D+) signal is live.

Cheers,

Jock.

 

[the1andonly]

In my case
The solar is controlled by a votronics mppt with 2nd battery trickle charge.
The mains charge is controlled by the issolotor ie off at all times ( i may also turn off the cbe mains charger)
If i need to mains charge the lithium hab battery i will use a plug in lithium charger. I will NOT run the engine in this state.
I hope this is correct and will work.

 

[the1andonly]

andy63 from another thread you quoted
before realising that my relays that provided my split charge are external to my cbe power supply unit and are easily disabled without causing any other issues..so I've actually removed the disabling relay on my system now..

My CBE 300 has 2 relays next to batteries and r37

Pausim
I was going to issolate b1 but with latest info do i need to remove one of the relays (which one) and or r37? So much for drop in replacement.

 

[Pausim]

@Pausim
I was going to issolate b1 but with latest info do i need to remove one of the relays (which one) and or r37? So much for drop in teplacement

Hard to tell, my system is wired differently so that doesn’t help. It looks like the relays are plugged into sockets so it might be a case of pulling them out in turn and then testing with a volt meter to see what is happening. Hopefully you can leave the resistor alone. Sorry not a very helpful reply.

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[andy63]

@andy63 from another thread you quoted
before realising that my relays that provided my split charge are external to my cbe power supply unit and are easily disabled without causing any other issues..so I've actually removed the disabling relay on my system now..

Hi..ive not been following this thread for a bit but I do remember posting to say that I had found an easier way to isolate my cbe split charge circut without resorting to installing a relay to do the job as described by Pausim...
If your instalation is a cbe one and employs two relays labeled as" boit relais security " and has the ds300 board then it's simply a matter of installing a battery to battery charger directly between the batteries ...
Then locate the boite relais security that is connected to the start battery ..the output of that relay which is engine run switched, is connected to the output of the other boit relais security that is connected to the leisure battery..
Just remove or disconnect that wire...
It is that simple..
The relays I'm referring to look like the image below.. which I pinched off the Web as I'm not home to photograph mine..

Andy..

 

[the1andonly]

andy63 i have 2 relays next to battery pictured above. Not As your picture. I have been outside playing with my multimeter.
It may sound daft but what am i trying to achieve.
Separation of 2 batteries whilst on mains charge
RelaY in 1 out 0 start= engine running ehu= mains charge on
Lhs rhs started ehu LB SB
1 0 0 0 13.4 13.1
1 0 0 1 14.0 13.2 lb sb different volts with engine on or off whist ehu on
1 0 1 1 14.0 14.4
1 0 1 0 14.4 14.4
1 0 0 0 13.4 13.0
0 0 0 0 13.4 13.1
0 0 0 1 14 13.1
0 0 0 0 13.4 13.0
0 0 1 0 14.3 14.3
0 0 1 1 13.9 14.4
0 0 0 0 13.5 13.0
Tabulation all gone to pot
Hope this makes sence

 

[andy63]

It may sound daft but what am i trying to achieve.

Well with you quoting my post earlier about me finding an easier way to disable a split charge system..ie the charging of a leisure battery via the alternator, I sort of assumed that's what you were trying to do..and all my comments references to simply that and nothing else..
Nothing to do with mains hook up or anything else..
If I've misunderstood what you were asking ...sorry..
If your relays are not the same as the one I've pictured I doubt what I've proposed would be relevant to you..
Andy..

 

[Pausim]

andy63 Your post about boite relais securite is very interesting. I do not have these relays alongside my DS300, or anywhere else I have yet discovered. I have assumed that they are not always used, hence my more difficult solution. However if they are likely to be found hidden away somewhere else I had better start looking.

I have heard that some Carthagos have an electrical compartment somewhere near the drivers seat but I haven’t found one. Having said that I know there must be a hidden junction somewhere because a blue wire leaves the DS300 but by the time it gets to the engine battery it is red. Any Cathargoists able to guide me?

 

[G7UXG]

Having said that I know there must be a hidden junction somewhere because a blue wire leaves the DS300 but by the time it gets to the engine battery it is red. Any Cathargoists able to guide me?

Pausim see my post number 52 of this thread, 3rd paragraph.

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