Batteries wired parallel ???

Submitted: Thursday, Apr 30, 2009 at 23:50
ThreadID: 68399 Views:3588 Replies:5 FollowUps:3
This Thread has been Archived
Right, i think this is a pretty easy question for the gurus out there. Am i right in thinking that if i wired 2 12v 18 a/hr batteries together in parallel i would still get 12v and 36amp/hr.

Reason being is i have one battery already (thinking of buying another instead of Thumper or waeco power pack) and just want a back up device to run my Waeco CF35 ACverb for a few hours. Will only be used as a fridge set at around 2-3 degrees c, and it has the cover and will be in back of car in good shade. Will only ever be used at night actually for around 8-10 hours and it wont be getting opened at all during these hours, and would cooled down to its temeprature. Im guessing the ambient temps to be anywhere from 5c - 20c, so not hot at all.

Does this sound alright, i was thinking if it used a max of 2 amp/hours for around 10 hours = 20 amp/hrs, which leaves me at least 1/3 of my battery power to save batteries.

Only thing is charging the batteries, i currently have a SLA 1 amp battery charger that i charge my current battery with. It does a good job. But if i have it wired in parallel can i charge both at the same time through same charger. i know it will take longer, but is it safe or possible. Just looking for a cheap and easy way to get me by for the time being until i can get my dual battery system. Could be a while away so i really want something to fill the gap thats not overpriced like the Thumpers and stuff.

Cheers
Back Expand Un-Read 0 Moderator

Sponsored Links