switching battery types

[jrogersthat]

Hello,
I recently bought a 2006 hunter 31 and replaced the lead acid batteries with agm's. My ac charger automatically switched charging configuration. My question is " do I need to do anything at the alternator for changing to agm's? "
Thanks

 

[Charles Erwin]

No doubt MaineSail will answer.

Meanwhile - you will find it helpful to read two discussions that concern AGM especially..

This one discusses AGM advantages and pitfalls.
http://forums.sailboatowners.com/index.php?threads/agm-batteries-making-the-choice.124973/

This one shows charging regimes and is relevant to both alternator and shore power charging
http://www.pbase.com/mainecruising/effect_of_charge_rate_on_agm_battery.

Charles

 

[Terry Cox]

I made no change to the alternator when I converted from lead acid to AGMs a few years ago. There were some programming changes to our Xantrex charger settings that were recommended. I made all the changes to the charging system through the Link-1000 interface. Total amp capacity, peukert function and battery type were among those made.

 

[Bill Roosa]

Probably nothing you can do at the alternator, the regulator however may have things that can be changed. Unfortunatly we don't know what alternator regulator you have.......

 

[Maine Sail]

Hello,
I recently bought a 2006 hunter 31 and replaced the lead acid batteries with agm's. My ac charger automatically switched charging configuration. My question is " do I need to do anything at the alternator for changing to agm's? "
Thanks

• What alternator do you have? Brand & Model #

• What brand AGM batteries do you have they all require differing absorption & float voltages plus every brad requires temp compensation

• What charger? Brand and model #

• Is the boat at a dock or mooring most of its life?

• Does the alt have an external regulator?

 

[jrogersthat]

Thanks for the response and I will answer those questions when I am back in town.