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Go Back   SailNet Community > On Board > Gear & Maintenance > Electrical Systems > would you buy used AGMs?
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Thread: would you buy used AGMs? Reply to Thread
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Topic Review (Newest First)
04-20-2014 05:00 AM
mitiempo
Re: would you buy used AGMs?

260 AH @ the 20 hour rate.

04-20-2014 12:55 AM
olson34
Re: would you buy used AGMs?

Hi Brian,
We have the T-145 type. I went back and corrected my error in the AH, too. Good catch!

This link shows one that looks like ours.
T-145 Plus | Trojan Battery Company

The flip-up caps are handy, BTW.
Loren
04-20-2014 12:04 AM
mitiempo
Re: used AGM's?

Quote:
Originally Posted by olson34 View Post
House bank is a pair of Trojan GC batts, flooded technology.

All of rest of the time we run everything off of the "house" bank, which is about 135 to 150 AH, depending on which edition of the Trojan brochure you look at.

Cheers,
Loren
Not sure where you are getting your information but the smallest 6 volt GC made by Trojan as far as I know is the T-105 - 225 AH at the 20 hour rate.

04-19-2014 01:37 PM
olson34
used AGM's?

An AGM battery comment, although not quite germaine to the question... but perhaps a data point all the same.
We are on our second AGM 12 volt "starting/emergency" battery. The first one was a Trojan and died too soon. Present one is a spiral-cell and must be about four+ years old. House bank is a pair of Trojan GC batts, flooded technology.
Reason for the odd battery technology in the "emergency" position was that the only good location for it on our boat was back under the aft cabin berth and there was no practical way to service a flooded battery there.

I also like the way I can charge it off the stock alternator for about 30 minutes, about three or four times a season, and it stays fully charged for long periods of time (i.e. self-discharge is very low for this type).

I just used/tested it for the first time this year to start the diesel a few days ago. Engine had not been run since I winterized it in early December. Glow plug and starting worked without a hitch.
As others have pointed out, most any 12 volt battery will start a small diesel, and it's just nice to know that we do have enough spare power available.

All of rest of the time we run everything off of the "house" bank, which is about 235 to 250 AH, depending on which edition of the Trojan brochure you look at. We have actually anchored out for two full days with the fridge running full time, and easily started up the three-cyl. diesel when we decided to leave.

Cheers,
Loren
04-19-2014 08:50 AM
TakeFive
Re: would you buy used AGMs?

Quote:
Originally Posted by Maine Sail View Post
Oddly enough the ONLY thing, that is non-routine maintenance, that has gone wrong with my Prius in 140K is the AGM accessory battery and it is now about ready again...... Nothing but the AGM accessory battery has failed on that car.

My wife's car, with 170K, still has the factory original flooded Honda battery that is now 8 years old........
I had motor mounts fail on my Prius, within about a year of purchase. Also, it has more rattles and clicks than I like.

FYI, my battery failed at about 80k miles. Other than buying at the Toyota dealer, the only 3rd party replacement that I found was an Optima battery ($147 at streetsideauto.com with free shipping).

If you find a lower price replacement, even flooded, let me know because I will need to replace my wife's Prius battery. However, note that the battery should have the little tube outlet for venting hydrogen out of the passenger area. The Optima does have that.
04-18-2014 08:28 PM
Don0190
Re: would you buy used AGMs?

Quote:
Originally Posted by rmeador View Post
I've also found what I believe is a GC25 at Batteries Plus -- can Maine Sail or someone else who knows about these things confirm that this is in fact the Deka GC25? It has a different sort of label, but it's a Duracell brand.

That's where I got mine and yes they are the Deka units.

I abuser mine for the first year, and maintained them well with solar the second. After sitting on the boat all year they were still at 12.5V.
04-18-2014 04:03 PM
Coquina
Re: would you buy used AGMs?

When I had my gel batteries I had no shore power and they routinely supplied occasional lights and radio power from December to March and then started the engine no problem

Quote:
Originally Posted by Minnewaska View Post
Our house bank is a 440 ah gel. Configured that was at the factory. Not a lot of manufacturer choices to replace a couple of seasons back, but the original set lasted 8 years. I could have easily gone two more with just a bit less capacity.

I like gels for their low self discharge over the winter, as I do not remove the batteries. I prefer to top off every 6 to 8 weeks. I went 12 weeks this past winter and they seem fine.
04-18-2014 03:57 PM
hellosailor
Re: would you buy used AGMs?

FWIW, I'd expect that most of the private-label batteries are just that, private label over a common product. After all, that's how battery distributors also give out warranty replacement batteries, slapping a "Honda" or whatever sticker on the same SKU that is used for their own brand name product.

BUT, private label products for large companies (Costco, Sam's, Sears, whoever) are often built custom, to a contract price, and if someone says "I need to knock two percent off that cost" it gets taken out, somewhere. So it is worth looking carefully, comparing weight and ratings, etc., when a private label product looks just like the original brand name. Even if they're different they may still be a great bargain.

FWIW.
04-18-2014 03:49 PM
Minnewaska
Re: would you buy used AGMs?

Our house bank is a 440 ah gel. Configured that was at the factory. Not a lot of manufacturer choices to replace a couple of seasons back, but the original set lasted 8 years. I could have easily gone two more with just a bit less capacity.

I like gels for their low self discharge over the winter, as I do not remove the batteries. I prefer to top off every 6 to 8 weeks. I went 12 weeks this past winter and they seem fine.
04-18-2014 03:34 PM
rmeador
Re: would you buy used AGMs?

It appears the EGC2/GC15 batteries are going at Sam's Club for $112.68 these days (Duracell® Golf Car Battery - Group Size 230 - Sam's Club). I've also found what I believe is a GC25 at Batteries Plus -- can Maine Sail or someone else who knows about these things confirm that this is in fact the Deka GC25? It has a different sort of label, but it's a Duracell brand. GC125 Golf - Utility 6V Battery - Wing Nut Terminal - Duracell SLIGC125 - Batteries Plus I'm now leaning towards one of these two options. Even if I had to buy the Sam's Club membership, the savings on a single battery vs the price quoted by Rolls would pay for the membership! Thanks again.
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