which brand B2B ( DC-DC BATTERY CHARGERS)

[TheCaller]

Put it another way what are they frightened to publicise about their prices and sales policy that they will not publish the info on their web site. Just like I avoid sites that harvest all your personal details to let you know their prices the bombard you with spam forever.

It just suggests to me that they are aiming to supply to the trade rather than to retail customers.

 

[maxi77]

I can't see anywhere on their site where they are trying to 'harvests all your personal details'

You have to give them your email address or phone number to contact them that can then be sold on the the scammers who bombard you with the likes of PPI claims stuff. Also from experience companies taking that approach only seem to answer emails at infrequent intervals, I am still waiting for a reply to an urgent question I sent one company in February.

 

[gerry mcg]

@Lenny HB , I emailed Udo at Schaudt as suggested. Here is my question and his reply

"EBL119 Charging Performance with alternator current.
I have a 2017 Euro6 150hp comformatic Globecar 600L Revolution panel van conversion which is fitted with a Schaudt EBL119 I have the manual in English but it is not clear what charging current is passed to the leisure batteries when the engine is running.

I understand the EBL regulates 240v to 18A but I cannot establish what the charging current is when driving. Can you please advise me? I am considering if a charge booster such as the WA121525, WA 121545 or Sterling 60A Battery to battery charger would be beneficial.

I understand my van does not have a smart alternator fitted."

Udo's reply was as follows

"the 18A are there when the mains charger is in operation.

Via alternator charging the current depends on the resistor of the wires and the battery itself. As well if the alternator switches off because Euro 6 and a good enough charged starter battery.

I would calculate when the alternator is in operation the leisure battery 2ill get between 15....25A charging current.

And I would recommend the WA 121525 to have more power on the leisure battery."

 

[Lenny HB]

I was right then.

On my van when the batteries were 15% discharged I was getting 20 amps at first but as the terminal voltage came up it dropped to 8 amps. That is pretty good, Hymers like most German vans have decent size cables. On a previous Hymer when the Gel batteries were quite flat on one occasion I clocked 40 amps going into them, Gels when flat have a very low resistance.

 

[Pausim]

After much deliberation and research I have bought a Relion LiFePO4 battery and have found this thread about b to b charging very helpful. I already have a Sterling 40A charger and Votronic mppt with LiFePO4 profiles but was unsure what to do about alternator charging when on the move. My EBL mains charging can be disconnected by pulling the 20A fuse (as advised by Udo at Schaudt) but I didn’t like the idea of variable voltages from the smart alternator making their way through the EBL to the battery. The answer seems to be the Votronic VCC 1212-45 which will not only manage the correct charging profile for the battery when on the move but will also provide a small charge charge back to the engine battery when on ehu, from the mains charger. Because of this I can disconnect the engine battery connection to the EBL and be sure that the varied alternator voltages do not interfere with the leisure battery.

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[Jon53]

You have to give them your email address or phone number to contact them that can then be sold on the the scammers who bombard you with the likes of PPI claims stuff. Also from experience companies taking that approach only seem to answer emails at infrequent intervals, I am still waiting for a reply to an urgent question I sent one company in February.

 

[Lenny HB]

With the Sterling B2B and an EBL the normal way of connecting is.
Disconnect the starter battery input from the EBL and connect it to the input of the B2B.
Then connect the output of the B2B to the input of the B2B where the starter battery was connected.
Now the B2B will control the 12v charging.

 

[Boringfrog]

With the Sterling B2B and an EBL the normal way of connecting is.
Disconnect the starter battery input from the EBL and connect it to the input of the B2B.
Then connect the output of the B2B to the input of the B2B where the starter battery was connected.
Now the B2B will control the 12v charging.

But won't the 12V internal system not work then?

 

[Jon53]

Ablemail is an engineering company based in Manchester and we produce all our products in the Uk . Our battery to battery charger has taken us 4 years to design and test and it is E11 approved.It is made an iso9001 approved factory. We are only a small company and it's actually quite difficult to make a site you can purchase from so I have concentrated on putting up technical information. I note a number of contributors find our lack of pricing information frustrating but it serves 2 purposes . 1) Our product is programmeable and after discussion I can often fine tune the programme for the user. I believe this ensures that it meets the customer expectation /requirement with minimal installation setup . 2 ) I like talking to the customers to gain ideas for improving the products and designing new ones . I can see that the lack of a price list frustrates some/ many and I will try to ensure the price is more easily accessible when I next update the website .

 

[Lenny HB]

But won't the 12V internal system not work then?

All you are doing is feeding the output from the B2B via the EBL split charge relay. Connecting that way just makes the wiring easier.
No effect on the habitation 12v system.

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[Boringfrog]

All you are doing is feeding the output from the B2B via the EBL split charge relay. Connecting that way just makes the wiring easier.
No effect on the habitation 12v system.

I have a B2B and I'm little nervous about wiring it up.

 

[Lenny HB]

Alternatively disconnect the starter battery input to the EBL and connect the cable to the B2B inout and the B2B output direct to the leisure battery's then you have bypassed the EBL on the engine charging side.

 

[Lenny HB]

I have a B2B and I'm little nervous about wiring it up.

Nothing like a big flash bang wallop to keep you on your toes.
You will only do it wrong once.

 

[Boringfrog]

Nothing like a big flash bang wallop to keep you on your toes.
You will only do it wrong once.

Right run it past me again:
Remove engine battery connection from EBL, connect to B2B input, what come out the B2B output and where does it go....?

 

[Lenny HB]

I have a B2B and I'm little nervous about wiring it up.

Nothing like a big flash bang wallop to keep you on your toes.
You will only do it wrong once.

Right run it past me again:
Remove engine battery connection from EBL, connect to B2B input, what come out the B2B output and where does it go....?

The EBL where you disconnect the feed in

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[Abacist]

I have a 25amp Sterling B2B that I used on my last van for a couple of years. Did the job and was faultless throughout. Sterling are what Vanbitz supply but mine is now evidently old hat - 25 amps is no longer available but much higher amps rated units are and in either waterproof or non waterproof formats as your need requires. They are used a lot on boats!

 

[Pausim]

I have used Sterling products for several years, both on boats and in motorhomes. However for B to B I opted for Votronic because they are designed to work with Schaudt EBLs. You can adjust the output current to fit the EBL parameters and the input one to match existing wiring and fuses. Saved time and avoided the need for an indepedant separator relay. Initially I tried a direct connection to the leisure battery but without the separator relay strange fluctuating voltages erupted when it shut off.