Troopie dual battery

John,
this thought from derek -> " They (Redarc) are very sensitive to voltage drop. Keep your wire run as short as possible and use at least 6 B&S but don't use the jump start function unless you go to at least 2 or 3 B&S. "

Could that go some way to explain why Redarc don't recomend using AGM batteries wired in parallel with Cranking batteries ????

That's old theory Mainey.
This was extensively debated here
www.exploroz.com/Forum/Answer.asp?ForumQID=31280
and the conclusion was that "identical batteries are needed in a parallel dual battery setup" is a myth that should have been buried a long time ago.

Ray, which part is "old theory"

Derek's statement about 'Redarc solenoids being very sensitive to voltage drop" ???

Derek sells them, so I would expect he would know the Redarc product very well and as an advertiser here on EO he would also only be posting technically correct information ?

-OR-

Is it that Redarc don't recommend using two different batteries with their solenoid?

I’ve read post 31280, I participated and also fully understand it.

I use two totally & very "different" batteries in my vehicle, even far more "different" than any AGM battery is, after all I need a CRANK battery to start it, and then I choose to use 2 x Delkor DC27 DEEP CYCLE batteries, wired in parallel to run the fridge and accessories.

After using a Redarc & then a Piranha DBE150, I changed to a Rotronics Electronic Isolator system, so now I get 2 x fully charged Deep Cycle batteries.
(remember the old advert slogan "when your on a good thing - stick with it")
I will stick with my Rotronics Isolator to recharge the 2 x Deep Cycle batteries and it does this with-out problems, they test @ 12.7 Volts (not surface voltage of 14.4v) when fully charged, so does that mean they are only 70% or 80% charged?
They often test at a slightly higher charge than the Overlander 700cca, 17 plate cranking battery L0L

>Ray, which part is "old theory"

having to use identical batteries in a dual battery setup.

>Derek sells them, so I would expect he would know the Redarc product >very well and as an advertiser here on EO he would also only be >posting technically correct information ?

Yeah like his advise to place fuses at the appliance not the battery, reason being less voltage drop, Honestly Mainey the mind boggles with this advice.

I>’ve read post 31280, I participated and also fully understand it

great so that's settled. I'm pleased we agree.

It's great that your system works for you Mainey but remember there are numerous ways to skin a cat.

wire to hf should be totally seperate not a spur to minimise radio interferance refer to radio manufacturers info,in the case of a barret a 25 amp fuse is recommended,you might not want your fridge and lights waiting for a 25 amp fuse to blow ,could have frasseled fridge and /or lights.
the hf wires are best kept away from other power cables as well to reduce interference