Supercharge allrounder vs AGM battery

Morning all.
Can anyone using a Supercharge Allrounder for the secondary battery please tell me how long it takes to charge from the alternator from half flat, also have read that AGM and wet cell starter batteries should not be used together, is this true?
Vehicle is a Patrol c/c, using a redarc battery controller.
Have solar panels that I use if camped for more than one night, but usually drive every day when on the big Island.
Any recommendations for the best combo of batteries?
Thanks guys.
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Reply By: Sand Man (SA) - Monday, Apr 13, 2009 at 11:46

Monday, Apr 13, 2009 at 11:46
An AGM and a wet cell starter battery can certainly be used together.

If the Redarc is a genuine Isolating controller the two batteries will be electrically separated from each other, unless it has an override switch to parallel the two batteries together.

The controller should first check the charge of the starter battery and if sufficiently charged, swap over to the auxiliary circuit.
You can place a volt meter across the auxiliary terminals and if the voltage reads about 14.1 - 14.2 volts, it is receiving a good charge.

If this is the case I would expect the battery may be faulty.

Alternatively, you could try charging the Supercharge Allrounder with a 240 volt charger. It may be "on the blink" (ie one or more cells malfunctioning)

How old is the Auxiliary battery and has it been run flat too often?

Bill




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AnswerID: 359363

Reply By: waymun - Monday, Apr 13, 2009 at 12:06

Monday, Apr 13, 2009 at 12:06
Havent got the Supercharge yet, just weighing up the options.
Recently cooked a 130 amp hour federal DC battery, like the idea of the Allrounder, but after using a DC got sick of having to drive for hours and hours to charge it.
So the answer I need is, will it charge as fast as a cranking battery off the alternator?
AnswerID: 359365

Follow Up By: Sand Man (SA) - Monday, Apr 13, 2009 at 14:28

Monday, Apr 13, 2009 at 14:28
A cranking battery doesn't generally take much to charge up as it is not normally drained in the way a deep cycle is.

So I would have to say if you are using the battery to run a fridge, of course it will take longer to charge up again, as you are drawing more current from it. The Supercharge Allrounder is a compromise between a starting battery and a deep cycle battery. From what I can see, It is still a "wet cell" battery of "maintenance free" design.

A cranker uses a large amount of current but for only a very short amount of time.

A deep cycle battery is designed to supply a relatively low amount of current over an extended period of time. Thus the term deep cycle.

Don't expect to get a long life out of a starter battery if used to run a fridge etc.
Some people will debate this, but a starting battery is not designed for deep cycle use.

An AGM type battery takes less time to charge than a well cell battery, but unless you have a solar panel of sufficient capacity (or an alternative method of charging to "keep up" with the current drawn from it, the battery will eventually drain down too low.
If this happens on more than a couple of occasions, you run the risk of destroying the battery. (A low voltage cutout device is a sound investment)

For more in depth technical information have a look at Deep Cycle Battery FAQ

Bill



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Reply By: waymun - Monday, Apr 13, 2009 at 15:07

Monday, Apr 13, 2009 at 15:07
Cheers Sand Man,
I think i'm leaning towards an AGM, Fullriver OK?
AnswerID: 359382

Follow Up By: Sand Man (SA) - Monday, Apr 13, 2009 at 17:40

Monday, Apr 13, 2009 at 17:40
Yep, Fullriver OK.

The most cost effective I have found however is the Remco, available at Whitworths Marine.

Just be aware that AGM batteries are heavier and have a larger footprint than an equivilent sized wet cell battery, so make sure it will fit where you want to place it.

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Reply By: drivesafe - Monday, Apr 13, 2009 at 20:01

Monday, Apr 13, 2009 at 20:01
Hi waymun, before you do anything, tell us about your set up, cable size and length, where you intend to mount the second battery and how long are you likely to be driving each day while your away and what are you planning on powering from the battery,and so on, because in most cases, on a dollar for dollar basis, something like an Allrounder is usually going to work out a much better buy, but again this depends on your set up and how you intend to use the battery
AnswerID: 359416

Reply By: waymun - Monday, Apr 13, 2009 at 21:30

Monday, Apr 13, 2009 at 21:30
Gday drivesafe, The battery will be in an undertray box about a 2 metre run from the redarc, cable size not sure but its pretty thick,done professionaly not by me.
Powering an upright 90 litre engel fridge in a Trayon camper.
Usually travel about 500 ks a day, depends if were in the bush or on bitchumen,but do have solar panels if we want to stay for a while.
AnswerID: 359425

Follow Up By: drivesafe - Monday, Apr 13, 2009 at 23:40

Monday, Apr 13, 2009 at 23:40
hi Waymun, With those daily miles, you would have no trouble keeping an Allrounder charged up
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