Wiring Votronic B2B through an EBL119

[gerry mcg]

Many thanks Lenny HB, autorouter and everyone else for the advice, hand holding and patience steering me through this

 

[steveh57]

I'm a bit late on parade here, but well done! Only thing I was going to add when I undertook a similar process with a different distribution box, yes I separately cabled the B2B and disabled the SCR circuit, connected direct to the Leisure batteries via Bus bars. Since the return common was via the original SCR common cable to the starter battery I doubled that up in capacity by adding another cable in parallel and also replaced the chassis earth strap from the gearbox as the original had seen better days.

 

[gerry mcg]

A screen shot showing the charging curve for the battery when it is fully charged, showing the B2B is throttling the amps from an initial 50A to <5A as the battery voltage reaches 14.4v.

 

[Lenny HB]

Can you set the B2B so the charge cuts out at 90% as that supposed to be the best option for long life.

 

[steveh57]

That’s an interesting thought, I wonder if you could somehow use the relay on BMV for that purpose

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[gerry mcg]

Can you set the B2B so the charge cuts out at 90% as that supposed to be the best option for long life.

I don't think so....
The only controls are charging profiles and limiting the Ampage
There are several lithium profiles with different charge voltages available (13.9v/14.2v/14.4v/14.6v) with differing durations before falling to a 13.8v float / maintenance charge)
If you know how to, can you let me know.
I guess if one did that, the outcome would be the battery would never be fully charged....

 

[Lenny HB]

I guess if one did that, the outcome would be the battery would never be fully charged....

That's the idea, for long life shouldn't be charged above 90% or discharged below 10% (20% even better).

If you set the charge voltage lower would that do it?