Battery Charger

Hi JTD
we set up our camper just as you described less the solar but have provision for it
We Installed a Cteck unit
Terrific gear

The Projecta IC2500 is just a straight charger and does not have all the features or the BMS 1215. The Redarc unit is the only one I know of that has the battery booster, charger and solar regulator in the one box. It's handy to have all those in the one box. The 1215 is very expensive, you may care to compare the value compared to installing 3 separate components.

As has been mentioned, the BMS 1215 appears to be the only unit that comes all three input types in the one "box".

Is this a good thing?
It would depend on cost of separate units, but also having separate devices provides a more flexible solution.

Consider this scenario using Ctek products. (As that is what I have)

A D250S Dual dc-dc charger will provide inputs from the vehicle alternator and a solar array, at the same time if desired. The D250S will determine the best input at any given time and use that source while it is available.

Any one of the range of Ctek AC chargers can then be connected directly to the terminals of the remote battery (or batteries) for charging from a 240v source when available.
You could even install a charging circuit terminating in an Anderson connector and plug the charger into this circuit, rather than have the charger permanently mounted in the camper. This can then be easily used for other purposes when required.

My camper has both the D250S and a separate multi-stage charger permanently mounted.
I can (and do) also connect my 7 amp Ctek charger to the alternator input circuit by way of the Anderson connector and set its mode to "supply mode" which basically simulates an alternator input, albeit at a lower current rating. The D250S dual then manages the multi-stage charging of the batteries in the camper, while it's sitting in the shed. I do this every couple of months or so.

There is no distinct advantage in having all possible input sources in the one unit but it probably gets down to the cost of the Redarc BMS 1215 vs a D250S dual battery charger, plus a separate smart charger, such as the Ctek MXS15 240v charger.

Approximate cost differential.

BMS 1215 - $1640 (wow!)

Ctek D250S Dual dc-dc charger - $299
Ctek MXS15 ac-dc smart charger - $295
Total cost - $595 or thereabouts.

I'm not a knocker of the Redarc product and have an excellent Redarc remote head brake controller, but the prices above indicate why I chose the Ctek solutions for my setup.

Another 'issue' with the BMS1215 is that it selects only one of the three possible inputs to provide current to the battery and it does so in a predetermined manner. So if you have a relatively large and flat battery bank and want to charge it quickly, the most you can get from a BMS1215 is 15 amps even though you may have all 3 inputs available which may in total be capable of much more.
If you had 3 separate devices (dc-dc, ac-dc, solar) each capable of say 15 amps then you could get up to 45 amps into your battery.

I dont know if the CTEK D250s is any different, but I suspect it switches between inputs rather than combining all.