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billp avatar image

VE-Bus-BMS-example alternator question

Hi,

I've been looking at this system example https://www.victronenergy.com/upload/documents/VE-Bus-BMS-example-with-3KW-12V-MultiPlus-230-Volt-revision-B.pdf

and I'm a little concerned about the alternator setup. It essentially shows the alternator connected to both a starter battery (assume some sort of lead acid/AGM) and the LiFePO4 batteries. Should the alternator be regulated in some way? Otherwise what's the voltage you are applying to the Li batteries? Should one use a smart regulator like a Balmer or Wakespeed which can be setup to have the proper voltage profile for the lithium battery but then you would have to deal with the starter battery as well. I suppose the starter battery gets such little use that if it's an AGM battery then the Li profile from the regulator should keep it reasonably charged. Another possibility is the Sterling AB12130 Alternator-to-Battery charger which deals with Li batteries as well as the starter battery. Is the profile that the Victron Li batteries require documented somewhere?

Thank you,

Lithium battery Smartalternator
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1 Answer
Daniël Boekel (Victron Energy Staff) avatar image

Hi @billp

You can find information about the charge voltages in the downloads section:

https://www.victronenergy.com/batteries/lithium-battery-12-8v#downloads

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Thanks for that pointer to the manual. I'll probably have more questions as I work through this project.