Wednesday, May 25, 2005 at 21:31
Hi Troopytrek,
This idea of having a battery that is the best of both worlds seems interesting.
I called in to a battery place today to see if what heavy batteries they have. There recommendation was either a Delkor 100Ah Marine or Delkor 900CCA Cranking part (both in 13inch cases, or 800Ah / 700CCA types respectively if 12inch cases).
I made a search for the N70EX you mentioned, is this a Exide Endurance? If so, they are only 620CCA. Not sure if this matters though.
Earlier in the thread, it was said that batteries rated in CCA should be ignored, batteries rated in Ah are the way to go.
This rating system seems particular to Aussie, in the UK all batteries are rated in Ah whether crank or d/cycle.
Our usage is currently on long weekends, we dont have time for pan Australia
treks (although l would like to!) thus we spend a lot of time driving and maybe only
camp in one spot for a couple of nights. Thus batteries are recharging quite a lot. Over winter l expect a bit of regular winching, so Marine types seem a good mid point. Do you winch much with yours?
Thus regarding connection, my plan was to hook the aux directly to the main battery using heavy cable (32mm^2). One clamp would be a screw type isolator, so that would be a cheap working isolator solution (providing l remember!). Maybe l'll look at a voltaging sensing relay later on, the battery place l mentioned has a 140A Matson unit for about $115 or there is the Redarc.
After a trip l could charge the aux battery with a mains charger to return to 100%(or thereabouts)
Thanks to all for their input.
Beast of Bodmin
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