[medicineman4040]

What keeps the Wirthco Battery Doctor via the alternator from overcharging the
auxiliary batteries ??
I'll be using 2 x 6 volt AGMs.

 

[proeddie]

The alternator circuit in the van. It keeps from overcharging the van battery, and the Wirthco just adds the aux battery(s) in parallel.

The 2 6V AGMs are wired in series to look like a 12V battery to the Wirthco.

Ed

 

[medicineman4040]

Thanks Proeddie
Two very very heavy boxes appeared today=6v AGMs. A small step for mankind!
Now please tell me why one would get the Wirthco Battery Doctor or this
https://www.amazon.com/Battery-Charger-12V-24V-Current-Limiting/dp/B008BL6MO8
It's the Pro Batt C battery to battery charger....and I assume it will do 12v to 12v (van to house).
Only thing I can tell and it seems like a biggie is that the Pro Batt C will charge the house batteries
in 3 or 4 stage and isn't that better for the batteries. Also it is supposed to be faster.
Thanks again.

 

[proeddie]

mm,

I can think of about 300 reasons why I would not get the Pro Batt C unit !

I found this info here: https://cdn.shopify.com/s/files/1/0..._ef287d8b-71f6-4ac3-90ba-951240713d83.pdf?751

I have had the Wirthco for about 2 years, and my batteries seem happy... every time I look at 'em, they're smiling (at about 13.2 volts)

I drive, I stop, I microwave, I drive, I watch TV with lighting on, I drive.... it just seems like it works!

Unless you're bringing your aux batteries to the lower limit all the time, I don't see the need. But that's just my opinion. Although I don't have solar, I would think you would get more from the money put toward a solar setup along with the Wirthco.

ed

 

[medicineman4040]

Thanks for your opinion....and yes that's $300 toward something else.

 

[RDinNHandAZ]

proeddie is right about this. That BtoB charger is completely unnecessary. The charging system of the van knows how to charge AGM batteries. Those batteries will last many years and serve you well in the van. Why would you introduce another complexity to screw the house batteries up? Solar is the secret too, and it's controller will have a setting for AGM. Spend the $300 on two 100Watt mono-crystiline solar panels. Then split for a 30 amp tracer MPPT controller and be done with it.

 

[medicineman4040]

The she-boss agrees.
Battery Doctor it is.
Still debating with the installer on how many solar watts possible with
our build: Coleman Mach 8 13K btu+ Maxxair fan.
Our reality is requiring ac, just too damned hot and humid here in the southeast.
So we'll do as many solar panels as will fit.

OK. Most decisions made. Time to do it.
If your curious here is the inverter-charger we've bought:
https://www.amazon.com/Samlex-EVO-3...charger+inverter+solar+charge+controller&th=1
Right or wrong
Now we're off for a while getting the windows installed and the ac and fan. then at home we'll do up the insulation and wiring. Will take a couple of weeks.
Lurking until then
Thanks again for all the prods/suggestions.
Robert

 

[Winston]

So we'll do as many solar panels as will fit.

We're going to be using the 270 watt Kyocera panels that are essentially the width of the Promaster (66") and, placed crosswise, will take-up 39" of roof (each). FYI