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Old 04-08-2015, 09:59 AM   #57
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ArcticFox, does your Iota have the IQ4 feature on it with the flashing LED that lets you know what charging phase the charger is in? The output in the user manual indicates shows Float - 13.5v, Absorption 14.1v and Bulk 14.7v. Looks like a good match for a Trojan 27 flooded cell battery. They are under $150 each and weigh about the same as the Interstate Grp 27 (55lbs) but have 105ah @ 20amps rating.

See my post 43 above for my experiences with my Interstates.

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Old 04-08-2015, 10:08 AM   #58
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Thanks for this Kelvin! Yes my Charger has the flashing LED light feature.
I was in the shop again this AM and noted that the battery that is only charging to 11.66 actually have a cell that needs water. I'm guessing that will not help the cause - so I'm about to head to town to see if I can find some distilled water someplace.
I'm not sure if it will give me the ability to bring the battery back but I'm guessing its worth giving it a try. If not I will look around for these Trojan 27 batteries. I don't live in a big place so finding them might be a trick.
Thanks again Kevin for your help

Cheers
Doug
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Old 04-08-2015, 10:21 AM   #59
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You may be able to salvage the Interstates enough to get you by until you switch them out. Buy a hydrometer (cheap purchase), add distilled water to the cells and put each battery separately on a standalone charger that can ramp the volts up to 15v. Pull off the caps to let the cells vent then run the charger for a couple of hours. Take the battery off the charger and let it sit for an hour then see if the specific gravity has returned to normal.

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Old 04-08-2015, 10:35 AM   #60
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I see that Trojan also has a Group 27 TMH that is 115AH. Thinking that would be the way to go as it it slightly better than the T105 6volt and no battery box mods now that Lewster has pointed out the solution?


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Old 04-08-2015, 10:45 AM   #61
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Be aware that when you equalize a liquid cell battery, you should put it thru a complete charge cycle first so that it is fully charged to its capacity. Then apply the high voltage.

It is also worth checking with the battery manufacturer to be sure of what voltage and duration the equalizing charge should be.


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Old 04-08-2015, 11:20 AM   #62
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Thanks everyone for your input. I found some distilled water and will give it a go
Cheers
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Old 04-08-2015, 11:34 AM   #63
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Quote:
Originally Posted by gandttimes View Post
I see that Trojan also has a Group 27 TMH that is 115AH. Thinking that would be the way to go as it it slightly better than the T105 6volt and no battery box mods now that Lewster has pointed out the solution?


George
Those are 61lbs vs 55lbs for the 27MTX. I'm not sure they are the newest model as I can't find them listed in the current model lineup on the Trojan website. There is an 27 SCS225 and its 66lbs with a 130ah 20 amp rate. They would be similar in weight to an Grp 27 100ah/20 AGM.

Unfortunately, my hitch weight is already to high (1100 to 1200lbs) otherwise I might go with the SCS225s.

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Old 04-08-2015, 12:01 PM   #64
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I'm with you Kelvin. The last thing I want to do is add weight to the tongue. I have a 28' with a prepared hitch so i'm in the same range as you.
I have the battery on the charger working away at 15A. We will see what happens.

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Old 04-08-2015, 05:31 PM   #65
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Ya know...........the new lithiums from AM Solar weigh about 1/3 if what lead batteries do.........and you mount them inside closer to the axels.

...........just sayin'.................


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Old 04-08-2015, 06:32 PM   #66
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Well the attempt to bump the dead cell back to life did not work. The battery had a reading if 11.66 before I added water and put it on a 15A charge. After a couple hours and an hour to rest it (as per Kevin's post) it had a reading of 11.74. So i'm guessing the cell is pooched.
To bad!
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Old 04-08-2015, 06:45 PM   #67
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Well the attempt to bump the dead cell back to life did not work. The battery had a reading if 11.66 before I added water and put it on a 15A charge. After a couple hours and an hour to rest it (as per Kevin's post) it had a reading of 11.74. So i'm guessing the cell is pooched.
To bad!
You need a 15 VOLT charge, not a 15 amp charge for equalization.
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Old 04-08-2015, 08:58 PM   #68
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Quote:
Originally Posted by lewster View Post
Ya know...........the new lithiums from AM Solar weigh about 1/3 if what lead batteries do.........and you mount them inside closer to the axels.

...........just sayin'.................


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Trouble is Canada is probably not the best area to be testing the Lithium's cold weather charging issues. Just saying!


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Old 04-08-2015, 09:14 PM   #69
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Hi Lew - sorry I will have to double check my charger, but I'm guessing it was charging at 15V not 15A. It's a standard Shop type charger I used and not one of my little smart chargers. If I remember right I can set it to either 2 or 15 as charging options.
For giggles I will pick up a hydrometer tomorrow to confirm my multimeter readings but in the end i'm guessing I'm pooched. I did check the pricing of the Trojan TMX here in Canada and they range in price from a low of 200 to a high of 230.00 - ouch!
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Old 04-09-2015, 08:15 AM   #70
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From what i have read from handy bob the BMK-N is just a meter showing voltage, amps like a multimeter vs Trimetric which shows actual usage of voltage/ amps in during charging and voltage/ amp out of battery showing a truer state of battery charge and discharge.

https://handybobsolar.wordpress.com/...battery-power/

SO is this true or not in your opinion.

PS I take what he and others say with a grain of salt as everyone has a different way of looking at the same issue.



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You don't need a Trimetric if you have a Magnum. You can install the integrated Magnum BMK-N battery monitor system that reads they the ME-RC remote.


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