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Go Back   SailNet Community > On Board > Gear & Maintenance > Electrical Systems > Battery choice
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Thread: Battery choice Reply to Thread
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Topic Review (Newest First)
03-17-2013 12:35 PM
Minnewaska
Re: Battery choice

If you want to pay the admission price, you can typically pack more amp hours into the same space with AGMs too. Sounds unnecessary for the OP.
03-17-2013 11:49 AM
hellosailor
Re: Battery choice

jeff, AGM is no better or cheaper than wet acid UNLESS you can benefit from the diffferences in the design. AGM can sit over the winter witout being charged, without permanent damage. Wet lead takes permanent damage (irreversible sulfation) if it sits for 30 days without recharging, regardess of charge state. AGM will never eat a hole in your clothing. Wet lead will at any opportunity including the carpet in your car. AGM will cost more than wet lead, but it will cost less than the clothing wet lead ate. Wet lead can be topped up if you overcharge it, AGM can't.

And gel batteries require totally different charging, for most users that's not an option.

Whether you chose wet lead or AGM, if the boat sits a a dock most of the time, a good shore charger will pay for itself by keeping the battery properly topped up but not overcharged. If you can't or don't have that option, hook up a small (20-30W) solar panel with controller and that probably will keep the battery topped up just as well. Keeping any battery properly and fully charged may double the life you get from it, and with battery prices skyrocketing that's good economy.
03-17-2013 11:44 AM
chucklesR
Re: Battery choice

The advantage of an AGM is less (no) maintenance, the disadvantage is the specific charging requirements.
For a weekender with a trickle charge or low amp outboard alternator and low amp needs, stay simple and stay sailing.
03-17-2013 11:25 AM
jeffzee
Re: Battery choice

im leaning towards grabbing a group 27 deep cycle from wal mart, $75! with good reviews. Pretty hard to go wrong for $75
03-17-2013 11:15 AM
norahs arc
Re: Battery choice

Re the interstate batteries - read carefully the charging requirements. I have a set that require an equalization every 2 weeks at 17 volts. Had a hard finding a controller that would do it.
03-16-2013 11:19 PM
jeffzee
Re: Battery choice

The charger i use on the boat is actually capable of charging AGM, but i dont see an advantage in terms of capacity per dollar.
03-16-2013 10:14 PM
jameswilson29
Re: Battery choice

I bought one at Costco - very reasonable price. Keep It Simple Sailor...
03-16-2013 05:43 PM
Minnewaska
Re: Battery choice

Quote:
Originally Posted by voyagerct View Post
.....I could go for an AGM or GelCell type battery for 2X the price, but I doubt I'd get twice the performance.
Nor have the right charging system, unless you changed that too. Batt types are not interchangeable on all chargers.
03-16-2013 03:05 PM
chef2sail
Re: Battery choice

Quote:
Originally Posted by jeffzee View Post
voyagerct: Thats exactly what i was thinking about the gel cel/agm's, I could buy two regular deep cycles for less then 1 fancy battery.
Its not that its a fancy battery,. If you had the right setups for charging and usage it would fit and be cost effecticve to get an AGM. Gel, but you dont so what you decided to get is an appropriate choice.

Also, If you had greater usage needs I would suggest two 6 volt golf carts as the thicker plates allow a much greater number of deep cycle charges thus greater life.

What you have decided is appropriate for your use, just be sure they are deep cycle batteries.
03-16-2013 01:33 PM
jeffzee
Re: Battery choice

voyagerct: Thats exactly what i was thinking about the gel cel/agm's, I could buy two regular deep cycles for less then 1 fancy battery.
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