Which AGM batteries are best - Page 3 - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > General Interest Forums > Gear & Maintenance
 Not a Member? 


Like Tree2Likes
Reply
 
LinkBack Thread Tools
  #21  
Old 09-19-2012
SimonV's Avatar
Wish I never found SN!
 
Join Date: Jul 2006
Location: Brisbane Australia
Posts: 1,990
Thanks: 3
Thanked 4 Times in 4 Posts
Rep Power: 8
SimonV will become famous soon enough
Re: Which AGM batteries are best

From what I have read, one of the big positives for going from wet to AGM is you do not need to change your charging systems. When I bought my boat it came with Gels and I could not be happier, when i need to replace them it will be with the same.
__________________
Simon
Ericson 39B.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

I love my boat
S/V GOODONYA
Brisbane
present location Heading to the Whitesundays

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

DELIVERY SKIPPER
Drinking Rum before 10am makes you a Pirate NOT an alcohlic
Reply With Quote Share with Facebook
  #22  
Old 09-19-2012
Senior Member
 
Join Date: Feb 2010
Location: Narragansett Bay
Posts: 8,236
Thanks: 6
Thanked 87 Times in 84 Posts
Rep Power: 6
Minnewaska will become famous soon enough Minnewaska will become famous soon enough
Re: Which AGM batteries are best

Quote:
Originally Posted by SimonV View Post
From what I have read, one of the big positives for going from wet to AGM is you do not need to change your charging systems. When I bought my boat it came with Gels and I could not be happier, when i need to replace them it will be with the same.
I don't believe this is correct. An AGM will ruin your alternator or charger without proper voltage/temp regulation for the AGM style.
__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Jeanneau 54DS

In the harsh marine environment, something is always in need of repair. Margaritas fix everything.
Reply With Quote Share with Facebook
  #23  
Old 09-19-2012
Maine Sail's Avatar
Senior Member
 
Join Date: Jan 2003
Location: Maine Coast
Posts: 5,127
Thanks: 8
Thanked 87 Times in 61 Posts
Rep Power: 15
Maine Sail is just really nice Maine Sail is just really nice Maine Sail is just really nice Maine Sail is just really nice
Re: Which AGM batteries are best

Quote:
Originally Posted by chef2sail View Post
Fitting a larger alternator which I wanted to do with the serp belt was not an option to me due to the space my engine is in.

I guess I have wasted my money then as are many of us with AGM.
I guess the marine professional we deal with really isn't qualified in his recommendations
I guess the marine industry is duping many of us to buy the AGMs

One thing my marine professional has said to me is the same as you said. You can't beleive what you read on the Internet. Funny these comments are all on the Internet I am reading including the SailNet ones.

Luckily I have already gotten a few years on these Lifelines so I will be waiting for them to expire any day now. Or maybe they will actually last the 8 years I expected them to to beat all the negative expectations I keep reading about to make them financially worth while. I don't jut consider the initial cost of the batteries as the only cost. There is the other associated energy costs to keep them charged.

There is a space issue and access for maintainence which also lead to my decision. There was a safety one where I didn't want H2SO gasses on my boat and in the compartment where I live or spilling around if I had to ork on them around

One of the reasons I chose the electromax on your recommendation which was a good one was the % of charge at lower Rpm. I know that the bank should have a larger charger, but it simply won't fit.

I will show your post to my marine tech. Like both you and Bill it is what he does for a living and he is recognized by people in the Annapolis area as one of the if not the top company and person to use in this area. Maybe I as well have erred in using his advice and expertise. He is independent of brand use and presented me with 3 different scenarios for Haleakulas electrical system. This was the option he suggested. I tend to trust people I can look in the eye, but of course do research on line to try and back up my decision. What I read on the internet is all over the map. So who should I beleive? I choose the best I can from the informstion I get.

I will be interested in his reaction to you and Bills posts as he has a lot of real world experience and customers too.

Dave
Dave,

I don't think you've been "duped" as it sounds as if you made an "educated" decision. You may get your 8 years out of them for how you use them. As I recall you are on a dock. One of the big issues I face with cruisers and many of my customers is that they are not tied to a dock on a regular basis. AGM batteries like to get back to 100% and a dock sailed boat has this advantage over a cruiser or mooring sailed boat. I am still at a loss as to why a larger amperage Emaax would not fit? The 80A model and the 140A model share the same exact alternator case and have identical exterior dimensions.. Only the internals, stator & rotor, are different..

As I have said before AGM's can be the right choice, they have many benefits, space constraints are another good one, but I would be doing many of my customers a disservice by only recommending AGM because AGM's can be a poor choice in some applications for a number of reasons from financial to how the batteries will be charged.....

I install a lot of the 220Ah 6V 4CT batts because they are a standard height and will fit more Ah's than four group 24's will...
__________________
______
-Maine Sail / CS-36T


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.




© Images In Posts Property of Compass Marine Inc.



Last edited by Maine Sail; 09-19-2012 at 07:16 AM.
Reply With Quote Share with Facebook
  #24  
Old 09-19-2012
Maine Sail's Avatar
Senior Member
 
Join Date: Jan 2003
Location: Maine Coast
Posts: 5,127
Thanks: 8
Thanked 87 Times in 61 Posts
Rep Power: 15
Maine Sail is just really nice Maine Sail is just really nice Maine Sail is just really nice Maine Sail is just really nice
Re: Which AGM batteries are best

Quote:
Originally Posted by SimonV View Post
From what I have read, one of the big positives for going from wet to AGM is you do not need to change your charging systems. When I bought my boat it came with Gels and I could not be happier, when i need to replace them it will be with the same.
You can often use flooded voltage settings but the acceptance rates of the batteries can tend to smoke small or factory alts not built to handle or disperse the heat. At a minimum I recommend an alternator temp sensor... I have two alternators on my bench right now both cooked by AGM banks.

With a single battery you can often do fine and some factory alts have built in temp compensation but you'll charge very sloooowly when they heat up. However when you get into bank of AGM this is where you really should complete the rest of the system.

These are expensive batteries that benefit from temp compensated charging and temp limited alternators will also benefit.

This is not just limited to AGM's and even a flooded bank that is much bigger than the alternator can suffer the same fate.
__________________
______
-Maine Sail / CS-36T


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.




© Images In Posts Property of Compass Marine Inc.


Reply With Quote Share with Facebook
  #25  
Old 09-19-2012
Maine Sail's Avatar
Senior Member
 
Join Date: Jan 2003
Location: Maine Coast
Posts: 5,127
Thanks: 8
Thanked 87 Times in 61 Posts
Rep Power: 15
Maine Sail is just really nice Maine Sail is just really nice Maine Sail is just really nice Maine Sail is just really nice
Re: Which AGM batteries are best

Here are some excellent links for some enlightening reading about a full time cruiser trying to use AGM batteries. I think John finally has it worked out but please DO read it all.. He eschews what I have been observing and trying to enlighten folks about for years. He does a GREAT job at nailing the "issues" and how to over come them.

These articles also display why I feel Lifeline battery is one of the best AGM makers out there. Justin has given John and Phyllis his full support and has NOT been bashful about having any of it posted on the internet so folks CAN get the best life out of Lifeline batteries..

AGM Batteries Test #1

AGM Batteries Test #2

Charging AGM's With An Alternator On A Cruising Boat

Problems With Using Battery Chargers To Charge AGM Batteries


18 Month Test Report

Equalizing Batteries On A Live-aboard Sailboat


Eleven Steps TO Better Battery Life

Direct Link To All John's AGM Articles
__________________
______
-Maine Sail / CS-36T


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.




© Images In Posts Property of Compass Marine Inc.


Reply With Quote Share with Facebook
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Batteries going bad? jbondy Gear & Maintenance 13 07-22-2008 11:37 PM
AGM or GEL batteries? Kater Gear & Maintenance 19 03-12-2008 12:50 PM
Batteries lgsailor19 Gear & Maintenance 2 05-20-2005 12:40 PM


All times are GMT -4. The time now is 05:26 PM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012