AGM Battery charging

Yep, the D250S dual will do the trick.
Both sources can be connected at the same time and the Ctek will determine which is the most suitable input.

Not only that, but the Ctek overcomes voltage drop in long cable runs and with the multi-stage charging capabilities, will give the best all round results to keep your AGM battery in tip top state.

Sound like a salesman don't I?
I'm not. Just a satisfied user of the D250S dual.

Kulkine Kampers have them at a very good price.

Ditto, works great

Its funny how I'm recommending the CTEK but I am using a projector dc/dc charger. Lol.
Scott

Forumites
Be careful with the CTek Dual. Works great (and I would recommend) if you have large solar panels.
But would not recommend if you only have a 50W panel on the roof; The CTek need a 'minimum amp' input (apologies if this is not the right terminology) for it to work, otherwise it cuts in-and-out.
Severla threads on Exploroz on this. Had the same problem until I increased my panel size
CJ

CSeaJay,

I do not subscribe to this theory based on my own experience.

I think previous quotes on this was based on watts, not amps.
I think the "minimum" subscribed to was 100 watts?
Not in my experience.
I have an 80 watt bi-fold panel and the input is constant given adequate sunlight. I have not experienced the D250S cutting in and out.

With the 80 watt panel supporting the 160Ah battery bank (2) via the Ctek, I observed 100% capacity at the end of each day, last week with the batteries running a 57 litre Engel upright fridge in the camper, plus the water pump and lights.

There must be other factors contributing to this "statement".
Maybe my setup is sound and all is good with cable size, etc.
The panels put in an unregulated supply which is then controlled by the Ctek's MPPT solar controller.

Works well with my 80 watt panels.

Hi Bill
I am not surprised it works well with 80W. Hence me specifically referring to 50W.
I had a 50W and it would cut in and out. Had it back to the retail shop(Battery world) and had the tch guy look at it. Replaced there (temporary) with a different unit. Same Problem.
They then confirmed to me it requires more input. At home I added my 80W panel to the mix and it solved the problem. It may well be the 80W is sufficient on its own as experienced by you.
This problem and solution above have been experienced by others as well on this and other forums. (As noted I may be wrong with the term amps, but it did require more 'input' than what the 50W panel would provide)
Comment still stand - if the OP plans on using a small panel of 50W then be aware of this problem.
Cheers

The solar pannel is connected thru a MPPT regulator...so your second paragraph means that I do not need any extra unit to switch between the two charger options.
If the alternator is running, does the solar regulator stops current from the system going to the solar pannel?
Thanks

Yes Ferrarofilms. The solar regulator does not permit flow TO the solar panel from either battery or alternator. There is no need to provide any switching between battery and the solar regulator.

Worth noting that for optimum solar performance the regulator should be mounted close to the battery, not at the panel end of the wire.

Cheers

John