SailNet Community - View Single Post - AGM batteries
Thread: AGM batteries
View Single Post
  #2  
Old 03-19-2013
btrayfors btrayfors is offline
Senior Member
 
Join Date: Aug 2006
Location: Arlington, VA
Posts: 1,812
Thanks: 0
Thanked 4 Times in 4 Posts
Rep Power: 10
btrayfors will become famous soon enough btrayfors will become famous soon enough
Re: AGM batteries

AGMs need to be secured. Doesn't hurt to put them in a box, either.

A group 27 start battery would work. I use a group 31 start battery for my 4-108 just for a bit of extra capacity.

AGMs and flooded batteries have almost identical charging profiles, so you could use a flooded start battery.

Not sure how your ACR is wired. The ideal way these days is to lead ALL charging sources to the house battery bank, then use either a voltage-follower device (e.g., EchoCharge or DuoCharge) or an ACR to maintain the start battery.

BTW, start batteries require very little charging. Starting your 4-108 typically will use 150-175A while cranking, but only for a very few seconds. Typical capacity draw for a diesel start is less than 0.5 amp-hours!! This is replaced in just a couple of minutes.

Bill
Reply With Quote Share with Facebook