Starter Battery Maintainer - 24v

[Wissel]

I know there are several different solutions to maintaining a 12v starter battery (VanBitz, Votronic, Ablemail,etc), but does anyone know a good solution for maintaining a 24v battery?

In my Vario I have a 24v starter battery and not decided yet between 12v or 24v in the hab area.

I'd like maintaining to take care of itself (like the above 12v solutions) but can't find a simple solution?

So far, I'm thinking a small (5A) Victron B2B with a programable voltage sensing relay controlling it.

But is there an easier/simpler/better solution?

 

[Burgo]

Maybe a bit left field, but is it actually a single 24v battery or two 12v ones in series? If the latter you may be able to use a vanbitz battery master on just one of them.

 

[Richard n Ann]

For maintenance charge you just want a buck converter that is settable to 26.8v.
Loads on ebay.

 

[rwg]

Can you find a 24V solar panel controller that has the ability to keep the vehicle battery topped up? That would kind of lock you in to running both systems at 24V though.

The Votronic one I have does this (12V only mind you) with a maximum 1A trickle current to the vehicle battery. What's more, I have noticed it will feed a trickle to the vehicle battery from the mains PSU too. - I presume that there is an internal circuit that allows a limited current to flow from the leisure battery to the vehicle battery when the leisure battery is higher voltage, and that circuit doesn't care if the power is coming from the solar panels or the mains hookup.

cheers,

Robin