Wiring in new Victron B2B?

That appears to be what the converters are doing now when they fit a B2B with a smart alternator they connect the fridge to the Leisure battery/B2B output.

I think but not a 100% sure Carthago fit a Schaudt 25 amp B2B, not a B2B I'm a fan of of. I'll find out if the van ever arrives, if it is the case I'll leave the Schaudt unit to run the fridge and fit a decent B2B for the batteries.
 
Lenny HB said:
That appears to be what the converters are doing now when they fit a B2B with a smart alternator they connect the fridge to the Leisure battery/B2B output.

I think but not a 100% sure Carthago fit a Schaudt 25 amp B2B, not a B2B I'm a fan of of. I'll find out if the van ever arrives, if it is the case I'll leave the Schaudt unit to run the fridge and fit a decent B2B for the batteries.
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Unless it's changed for the 2025 model year you're getting :giggle: you'll get the 25amp Schaudt. Enough to run the fridge, and any a wee bit for the batteries. At least that's what we got on the 2021 Merc. Iveco got a split charge relay, so even less for the batteries!
 
AdrianChen said:
Unless it's changed for the 2025 model year you're getting :giggle: you'll get the 25amp Schaudt. Enough to run the fridge, and any a wee bit for the batteries. At least that's what we got on the 2021 Merc. Iveco got a split charge relay, so even less for the batteries!
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It's only a Compactline, a couple of years ago it did get mentioned in the chassis pack but not now, maybe they don't think it's necessary to mention it now.
If 15 amps is being used for the fridge it won't do much for 460ah of Lithium.
 
Lenny HB said:
It's only a Compactline, a couple of years ago it did get mentioned in the chassis pack but not now, maybe they don't think it's necessary to mention it now.
If 15 amps is being used for the fridge it won't do much for 460ah of Lithium.
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Yes they said all vans get a "booster" in the marketing blurb - then in the E/S manual "depending on model", E had one above the batteries but spent ages looking in all the places I was told it would be on the S.....

460ah - it'll just about run the BT and LED's! Will you get much solar on the roof (they fit so much stuff up there hatches-sogs-ariels-fridge vents etc)?
 
Lenny HB said:
It's only a Compactline, a couple of years ago it did get mentioned in the chassis pack but not now, maybe they don't think it's necessary to mention it now.
If 15 amps is being used for the fridge it won't do much for 460ah of Lithium.
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10 amps left for everything else. :-(

Frustrating they don’t think about these things. At least Hymer whacked in a huge alternator, even if they didn’t provide a B2B in 2013.

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Guigsy said:
Update: I turned the solar off for a few days to run the battery down a bit. Then drove around this morning with my new Votronic 30a B2B. It is providing 30a... But only about half that when the fridge is on, so I guess it isn't a separate circuit. I've never checked, but I bet I was getting almost no charge whilst the fridge was on before.

I've also got myself an IR camera, so I could check for hotspots. The wiring was about 20C after half an hour, the Votronic's case was about 25C. Inside the vents it was considerably warmer at 65C according to the camera, but I guess that's why it's got a fan on such a small unit. If everything outside is cool, I think it's all good.
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That’s the same on ours with the Victron 30, 25/28amps with fridge on and 30/32 off🤔
 
Well, it arrived today and was promptly installed.

IMG_3719.jpeg


Charging with the Votronic and B2B initially made 75 amps which is a massive improvement to the 27ish just from the Votronic, there was about 3 amps of solar also coming in.

It did drop back to 70 amps after a short run, I suspect the alternator can’t keep up with the fridge as well. Charging the starter, running all loads and fridge, means even a 150amp will struggle I suppose.

It was dropping further when the fan cut in, that was at idle though so again, I suspect the alternator wasn’t giving out its rated output. Input was 50 amps bang on, output was 45amps, no idea why though, where did the 5 amps go? 😂

Have to say, it’s an impressive bit of kit for the size and was a doddle to put in.

Thanks nigelivy for the excellent service. 👍

Not worried about running out of power over winter at all now.

IMG_3718.png
 
I get 30A from the Votronic. I have a different shunt so maybe that’s why there’s a reported difference.
 
Googlebot said:
Input was 50 amps bang on, output was 45amps, no idea why though, where did the 5 amps go? 😂
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I just noticed that you are also missing 5A on the Orion XS. My Orion outputs 49.5A and my Votronic 30A so I’m wondering why your reported amps are lower than reported on mine.

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Googlebot said:
Input was 50 amps bang on, output was 45amps, no idea why though, where did the 5 amps go?
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To see the efficiency you need to look at the voltages as well, and calculate volts x amps. Probably the input was at say 14V and the output at 14.5V. You will lose a few percent of the power in the conversion, but it should be better than 10% loss.
 
I will keep an eye on it.

I have never got more than 27 to 28 amps from the Votronic, perhaps the Victron will be the same.

The beauty of the Victron is I can see instantly what’s going on. To be fair, I am more than happy with the charging at 70 amps.
 
Quick question related to upgrading from the Schaudt b2b to a Victron b2b.
As I understand, the D+ signal is no longer necessary in the Victron because it has a smart detection of alternator status through the voltage?
Is then a straight swap from one to another, and you just forget about the D+?
 
AdrianChen said:
The reason I am putting in an XS is:
So that I can use smart networking (or DVCC ) and therefore get an accurate charge profile through shared battery voltage and temperature from the Smart Shunt
So that all the charge devices in the network will compensate accurately for voltage drop in the cables
So that I can set a 5°c low temp cut-off to ensure the Lithium batteries do not receive a charge. (I do this now using temp sense relay, but this is simpler)
I will use DVCC, so my CerboGX (Could alternatively use a raspberry PI) will control the XS as well as my two MPPT controllers to keep them all in sync, and I have a max current limit to avoid putting over a certain current into the batteries for longevity (probably unnecessary but still)
So that I can see exactly what current is coming out of my alternator (Via Connect, or VRM history) which may get a temp tab to keep an eye on its temperature (in high temp places) so if the Alt is getting hot I can set a temp limit and use a relay on the cerbo to turn it off VIA the D+ signal, just to protect the alt from premature failure (again probably not necessary but hey!)
So that I can see via VRM what the starter battery voltage is, and remove the AUX connection/fuse from the Smart Shunt (simpler)
So that I can initially tune the current on the input side, until I am fit enough to change the 8m input cable from 16mm² to whatever is needed.

Essentially because it will integrate and play nicely with the other Victron kit, and give comprehensive reporting on VRM or Connect.

I also like fiddling with this stuff
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🤦‍♂️wtf did all that lot mean? :oops: I can't contribute to your question but was reading the thread out of interest, until you wrote this......now I've lost the plot so I'm out, but good luck with getting an answer (y)
 
Peavy said:
Quick question related to upgrading from the Schaudt b2b to a Victron b2b.
As I understand, the D+ signal is no longer necessary in the Victron because it has a smart detection of alternator status through the voltage?
Is then a straight swap from one to another, and you just forget about the D+?
Click to expand...
Best to use the D+ as if you are charging the starter battery with solar or mains it could cut in when you don't want it to.

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Paulypaul said:
🤦‍♂️wtf did all that lot mean? :oops: I can't contribute to your question but was reading the thread out of interest, until you wrote this......now I've lost the plot so I'm out, but good luck with getting an answer (y)
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Sounded fairly basic it me. 🤣
 
Peavy said:
Quick question related to upgrading from the Schaudt b2b to a Victron b2b.
As I understand, the D+ signal is no longer necessary in the Victron because it has a smart detection of alternator status through the voltage?
Is then a straight swap from one to another, and you just forget about the D+?
Click to expand...
Why swap them, why not use both? If your alternator and battery capacities are sufficient you could use them alongside each other. I checked this out with Schaudt, see #8.
 
Pausim said:
Why swap them, why not use both? If your alternator and battery capacities are sufficient you could use them alongside each other. I checked this out with Schaudt, see #8.
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Schaudt one I don't like with Lithium as the Lithium setting is a constant 14.2v output doesn't cut off when battery charged.

I've bought an Orion XS 50 amp for my new Carthago, don't like the way the Schaudt works and you lose 14 amps of the 25 to the fridge. Looking at rewiring the Schaudt to just run the fridge.
 
Googlebot said:
I currently have a Votronic 30amp wired in as the thread in my signature. It is faultless and has been great!

I am tempted by the new Victron as the rest of my kit is also Victron.

Currently it goes through the EBL as it’s only 30amps. Technically the new Victron is just within spec of the EBL at 50amps but I think I am pushing my luck and will need a complete rewire to install it. I know I can down rate the Victron, but I may as well stick with what I have if I do that?

What do the more knowledgable think?

What I have works very well and I am unsure if I can be bothered to rewire completely for an extra 20 amps and shiny new B2B, or can I? 😝
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If it ain't broke……..🙂
 
It settles to about 60 amps output. Initially it goes to 70 amps then comes back to 60 amps after about 10 minutes.

Solar also putting some in as well when it’s sunny.

Victron shows a constant 50amps input and about 46 amps output.

I am happy, battery charging is excellent. 👌
 
Paulypaul said:
🤦‍♂️wtf did all that lot mean? :oops: I can't contribute to your question but was reading the thread out of interest, until you wrote this......now I've lost the plot so I'm out, but good luck with getting an answer (y)
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So sorry to have troubled you, perhaps an admin could delete it for me?
 
AdrianChen said:
So sorry to have troubled you, perhaps an admin could delete it for me?
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You've taken my post in the wrong tense? I was merely saying that your obvious technical ability and the way you posted it, took me from a level of some understanding, to being completely dumbfounded.

But I wouldn't ask for it to be deleted if I were you as it seems to be a very beneficial thread for those who understood it ;)

Now I'm off to watch reruns of Young Sheldon to brush up on my physics.

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Paulypaul said:
You've taken my post in the wrong tense? I was merely saying that your obvious technical ability and the way you posted it, took me from a level of some understanding, to being completely dumbfounded.

But I wouldn't ask for it to be deleted if I were you as it seems to be a very beneficial thread for those who understood it ;)

Now I'm off to watch reruns of Young Sheldon to brush up on my physics.
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I learnt everything from him!
 

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