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Old 12-03-2015, 18:49   #31
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Re: Batteries Too Big To Install?

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Originally Posted by funjohnson View Post
Trojan recommends a charging source of 20% bank size to keep times down. I can't see having such a large bank in a light displacement sailboat and needing hours of engine run time to bring it back up.

Matt
Matt--in aggregate his charging system sounds up to it. And you won't notice the weight if it's right over the keel. L16's also provide among the highest number of discharge cycles.
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Old 12-03-2015, 19:30   #32
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Re: Batteries Too Big To Install?

TN, one problem is the weight won't be right over the keel. Maybe half way between if and the water line.


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Old 12-03-2015, 19:45   #33
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Re: Batteries Too Big To Install?

How far from centerline, enough to require adding ballast elsewhere?
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Old 12-03-2015, 19:55   #34
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Re: Batteries Too Big To Install?

L-16's are considerably easier to move than 4D or 8D's.. Consider a good mountaineering back pack for getting each battery on board.. I do it quite frequently and the handles on the Trojan's are good..

BTW Dyno Battery has some excellent L-16 boxes.....
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Old 13-03-2015, 06:50   #35
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Re: Batteries Too Big To Install?

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I technically have room for four Trojan L16H's under the quarter berth in my 38 footer. Iím a young guy, but dang these 125 pound batteries are going to be a pain to get onto the boat, down the companionway, up onto the berth then (finally) down into the berthís storage locker. Even if I figured out how to get them down there, uninstalling them at the end of their life will be more of a challenge.

From a practical perspective, what do people think about down grading in size to Trojan J305H's at 25 pounds less and four inches shorter, which I feel can I can handle?

Using Lifeline specs, there's a GC2 (4CT) at 220 Ah/66-lbs, and then another slightly taller version (6CT) at 300 Ah/90-lbs. Their L16T is 400 Ah/119-lbs.

Perhaps the 6CT is like Trojan's J305H? If so, and if Trojan's specs are similar, a bank of 4 for 600 Ah total isn't chump change.

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Old 13-03-2015, 09:25   #36
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Re: Batteries Too Big To Install?

I am in the process of converting to GC2 6 volt batts. I didn't buy Trojans and didn't get them from Sam's Club. I have had great service from Interstate Batteries in the past and the store manager gave me a good deal on 4 GC2s each with 230 AH at 6 volts. I think I am going to be happy with my solution.
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Old 13-03-2015, 13:52   #37
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Re: Batteries Too Big To Install?

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I have been going back and forth on this issue and I canít land on what to do. Figure Iíd seek sage advice from those on this forum.

I technically have room for four Trojan L16H's under the quarter berth in my 38 footer. Iím a young guy, but dang these 125 pound batteries are going to be a pain to get onto the boat, down the companionway, up onto the berth then (finally) down into the berthís storage locker. Even if I figured out how to get them down there, uninstalling them at the end of their life will be more of a challenge.

From a practical perspective, what do people think about down grading in size to Trojan J305H's at 25 pounds less and four inches shorter, which I feel can I can handle? That or any tips at getting the beastly L16Hís moved into place safely.
Hi,

L16h BATTERIES are big batteries and can supply a lot of power, but every battery has to be given tender loving care and if you are going to install them where it will be a pain to get to then you'll probably revert to an out of sight, out of mind maintenance program.

Down grading to a smalller battery depends upon your need for power and the size of the charging system that you have.

Think it through carefully and totally. Good luck.

Howard R
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Old 13-03-2015, 18:48   #38
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Re: Batteries Too Big To Install?

Archimedes used to say, in the Doric speech of Syracuse : ďGive me a place to stand and with a lever I will move the whole world.Ē

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Old 13-03-2015, 21:51   #39
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Re: Batteries Too Big To Install?

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Originally Posted by funjohnson View Post
With a 100 amp alt as your main charging source, I think you are also looking at too large of a battery bank to sufficiently charge. What are you using on your boat that you need 870 ah? If it is just the normal stuff, get a smaller bank and use the money for solar.
Matt
It's not the size of the bank vs the charging source that really counts.

It is the size of the bank vs the daily usage.

For a given daily usage the larger the bank the lower the percentage used. If you have the space and the money the extra amp hours will keep the batteries in the top 25 - 30% rather than the top 50%.

The easiest way to improve a battery bank's life is to make it larger.
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