Lithium batteries and Battery Master? (1 Viewer)

[Ingwe]

Have decided to get a lithium battery. Currently, the vehicle battery gets charged when on ECU or using solar by the Battery Master I fitted.
Now the proposed lithium set up is as follows:

1 x <Broken link removed>
1 x <Broken link removed> This not only provides a display showing the battery State of Charge, with the Peugeot chassis it also acts as a Battery to Battery charger of around 45 Amps.
1 x Votronic MPP Solar Regulator to ensure the solar charges correctly for the Lithium curve.

Am I correct in thinking that the 3Link, acting as a B2B charger, will render the Battery Master obsolete and the vehicle battery will be kept topped up by the lithium battery?

 

[Two on Tour]

No, the 3LINK will only charge your lithium leisure battery when your engine is running via the alternator and at the same time the alternator will charge your cab battery, so you will still need your Battery Master to keep your cab battery topped up from your leisure battery when the engine is not running.

 

[Fat Albert]

Well that isn't strictly true, I have what Ingwe is proposing to fit in my MH. Never been on EHU during all Lockdown or through the winter, Hab battery 13.7v and the minimum the Cab battery went to was 12.4v as displayed on my Phantom App. When I go to check on the van and check the the 3 link display there is a charge voltage going to the cab battery of 13.7v. I was worried about the full hab battery over winter but took advice from the installers who said not to worry. I may fit an isolator switch in the solar feed. I have my tin hat and Kevlar undies on because I'm sure I have ruffled some feathers. I have just check the app and 2 days ago was up at 13.6v and has now settled at 12.7v and I don't have a Battery Master. When I turn the fridge on 240v to get cold, prior to a trip, my battery charger doesn't put charge into my Cab battery and will only put a charge if the hab battery is below 80%. 300w of solar is doing all the work.

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[Lenny HB]

As you are fitting a Votronic solar regulator you could use the starter battery out put on that it charges the starter battery at 1 amp.

 

[Two on Tour]

As you are fitting a Votronic solar regulator you could use the starter battery out put on that it charges the starter battery at 1 amp.

Is that 1 amp reliant on solar or a divert from the hab battery ?

 

[Lenny HB]

Is that 1 amp reliant on solar or a divert from the hab battery ?

Solar.

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[Two on Tour]

Solar.

You had better hope for sun then, a rare entity at night and in winter months and poor weather.

Battery Master 24/7 - 365.

 

[Ingwe]

Thank you all for the informative and helpful replies. As the van is ordinarily stored in a large garage where the solar panel is useless and the van is on EHU (with a timer) I’ll rely on the Battery Master to keep the cab battery charged.
I wasn’t clear on the interrelationships of the BM with all the new gear to be fitted.