Nigel replied:

They are quiet large and heavy, but for some weird electrical reason, 2 x 6 volts batteries in series are better than 2 x 12 volt batteries of half the Ah rating in parallel.

I got the battery box on my camper trailer built so that it can fit 2 T105's for when we do some long trips down the track, but haven't bought them yet. Trojan do have a good reputation.

mardy replied:

graham,
I'm looking at buying the same batteries, for what its worth...they were recommended to me from the guy at battery world.$189 ea what price have you been quoted??Let me know how you get on with them.mardy

Mardy replied:

Graham,
Oh yeah..umm.I forgot....the guy said that that was trade price.

If its of any help I have learnt to get the best life span out of a deep cycle battery is to charge them at 10% of their capacity, no matter wether there dead flat or half charged...A standard altenator will put in a heap of amps in,initially and taper off as the battery comes up to capacity.

I've got a circiut diagram for a regulator to do just that ( means having a dedicated altenator for the job, you remove/bypass the internal reg.) let me have your email address if you would like the info.
regards Mardy

gg replied:

hi i run my fridge of a 220amp hr deep cycle battery at the moment i charge it as and you notice the fuel the alternator uses hell with 2 alternators look out i travel then disconect when i stop when im at detination i run generator for a few hrs at night to top it up and i get the side benefiet of eletric lights and if the football is on i watch that eventualy when i get my next vehicle ill have solar panels