Batteries

Submitted: Saturday, Apr 24, 2004 at 11:08
ThreadID: 12329 Views:1257 Replies:6 FollowUps:4
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Rather than fitting dual batteries I am considering installing the biggest deep cycle I can fit and using this to start as well as run the fridge and lights when stopped. I have a genny as a back up should I flatten it too far.

How well will a deep cycle operate as a starting battery (petrol V6)?

Jim.
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Reply By: TheUndertaker - Saturday, Apr 24, 2004 at 11:35

Saturday, Apr 24, 2004 at 11:35
Jimbo ,unless you use an optima you will kill the battery in less than 2 months,becomes an expensive proposition,,read www.uuhome.de/william.darden/carfaq.htm
AnswerID: 55737

Follow Up By: GO_OFFROAD - Saturday, Apr 24, 2004 at 15:27

Saturday, Apr 24, 2004 at 15:27
Jimbo,
have you looked at one of the engel or weaco battery packs wired to plug into and charge from an aux plug, so it charges while you drive, but is diconnected when the ign is off?

This way it can run acc seperte to your main battery.
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FollowupID: 317613

Reply By: The Publican - Saturday, Apr 24, 2004 at 12:20

Saturday, Apr 24, 2004 at 12:20
If you use something like a Century Overlander which can cop a bit of deep cycling you will be ok. You can buy a low voltage cut-off from BigW for about $20
AnswerID: 55740

Reply By: Flash - Saturday, Apr 24, 2004 at 12:25

Saturday, Apr 24, 2004 at 12:25
There are a number of batteries made which are a compromise, ie: a bit of both. If you went for a very large one of these you would probably be fine.
AnswerID: 55741

Reply By: -OzyGuy- - Saturday, Apr 24, 2004 at 13:16

Saturday, Apr 24, 2004 at 13:16
Jimbo,

-->




It won't work!

Deep Cycle batteries are not designed for quick discharge as is a cranking battery.

If it was possible don't you think everyone else would buy only one battery instead of two or three and an Isolator and all the wireing etc....
AnswerID: 55748

Reply By: Crackles - Saturday, Apr 24, 2004 at 19:10

Saturday, Apr 24, 2004 at 19:10
Jimbo, I'm currently trialing a system similar to what you speak of.
I've fitted two 115 amp hour Trojan deep cycle batteries together in parralel with no isolating system. Sorry to say Ozguy & TheUndertaker but its lasted over a year so far with no hint of failure & I've never had any battery spin the 1HZ diesel over quicker.
With 230 Amp hour on tap it has run the fridge & lights up on the cape in 34 degree heat for 4 days & still started.
My theory why it works is that the 2 batteries share the high starting load. Fitting one standard 80 Amp hour Deep cycle as a starting battery probably wouldn't work as it could have trouble delivering the starting current & may cause damage trying.
As I said earlier the system is on trial & I'm currently doing tests to see whether the car is actually fully charging the batts. I suspect not but even if it only puts in 80 % that's still over 180 Amp hour to play with.

If you only want to use one battery I'd go with some of the other advice and get a big cranking compromise type & fit the Low voltage disconnect then use the genny as back up . Cheers Craig................................
AnswerID: 55775

Follow Up By: Jimbo - Sunday, Apr 25, 2004 at 11:35

Sunday, Apr 25, 2004 at 11:35
Thanks Craig,

Great information.

Jim.
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FollowupID: 317694

Reply By: Mrs Diamond - Sunday, Apr 25, 2004 at 13:36

Sunday, Apr 25, 2004 at 13:36
jimbo i have a delcor m27 80amp marine deep cycle(sorta)had it over 2 yrs spent over a year as a starting battery and still going as strong as the day i bought it just spent 10 days using it for our weaco still good now in our ather car as a starter.
AnswerID: 55853

Follow Up By: Mrs Diamond - Sunday, Apr 25, 2004 at 13:37

Sunday, Apr 25, 2004 at 13:37
i forgot to mention only cost about $120
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FollowupID: 317712

Follow Up By: Member - Bradley- Monday, Apr 26, 2004 at 10:04

Monday, Apr 26, 2004 at 10:04
Yep i have the same batt. FANTASTIC.
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FollowupID: 317835

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