Victron DC/DC 30a with schaudt 101

[cmanzoni]

Dear all,
I'm planning to install the victron dc-dc Orion tr smart to my HYMER B 654 SL with an EBL 101.
The idea is to disconnect the SB+ from the back of the EBL put it in the IN+ of the Orion and back to the EBL from the output of the Orion (fuse and cables will be added/changed based on the 30 amps).
The question is, do have I to disconnect the internal EBL charger?
In some posts there are advice to remove the 20 amps fuse from the EBL or remove the 230v AC connection but I really don't understand why.
The 230 is on only when the engine is off, so I don't see conflict and I wouldn't lose the changing function of the EBL when connected to the 230.

Am I wrong?

Many thanks,
CM

 

[berni109]

What type of battery are you wanting to charge?
Do you want to disable the split charge function?

 

[autorouter]

If the internal 20A charger of the EBL is suitable for the leisure battery that you have, then you can use it as before. The problem arises if for example you fit a new lithium battery, and the charger isn't suitable, or you just want a more powerful charger. Then you can pull the 20A 'Internes Lademodul' fuse to stop the charger sending charge to the leisure battery.

There's an extra complication if you want the EBL to trickle-charge the starter battery. There is a relay that enables the trickle-charging, which is switched on when the EBL 230V charger is on. It doesn't actually provide power to trickle-charge the battery. However if another device is charging the leisure battery (solar, another mains charger etc) then the trickle-charge will work from that. If you pull the 230V plug from the front of the EBL, the 230V charger goes off, and the relay switches off, stopping the trickle charging.

 

[Lenny HB]

It is better to bypass the EBL when wiring the B2B, rather than wiring the output back to the EBL take it direct to the leisure battery. On older EBLs' the contacts on the split charge relay a have a layer of carbon on them which will reduce the charge rate.

 

[cmanzoni]

berni109 autorouter Lenny HB thanks for the info.
I've 2 AGM gel batteries managed by a NDS I manager. I'd like to maintain the split charge function, at least until I'll buy a new charger (multiples 12/1600/70).

I can bypass the EBL as suggested but this imply I still have to remove the BM+ from the back or with engine on I'll have 2 contemporary currents one from the B2B and the other directly from the alternator to the EBL, right?
Related to the trickle-charge I thought it used an internal charger for both the batteries ( engine/leisure) but from what I see it just charge the leisure and let a little flow of current to go to the BM from the BS?

Thanks again to you all.

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[autorouter]

The split charge relay is built into the EBL. It connects the leisure battery directly to the starter battery when the engine is running, so that the alternator can charge both batteries. When the engine stops, it disconnects the leisure battery from the starter battery.

If you wire the DC-DC charger as in post #1, by removing the starter battery input to the EBL and so on, then the output of the DC=DC charger will go into the starter battery input of the EBL. It will then go through the split charge relay, to the leisure battery.

If you want to bypass the EBL as Lenny HB suggested, then the first part is as before: remove the starter battery input from the EBL and connect it to the DC-DC charger starter battery input. However the output goes straight to the leisure battery via a new wire (and a fuse of course). Because you have disconnected the EBL starter battery input, there will be no supply to the split charge relay, so it won't do anything. It will still click on and off, but won't send any amps to the leisure battery.