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Old 09-19-2007, 11:45 AM   #15
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I wouldn't think it would matter which way you attach to your bank, as long as the interconnect cables are sufficently sized... I'd probably set it up with pairs in parallel, and those pairs in series.

Trojan T-105's are 6v and 225 amp hours on the 20 hour rating, therefore two of them in series would give you 225 amp hours at 12v.

Four in parallel/series would give 450 amp hours at 12v at 20 hour scale.
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Old 09-19-2007, 03:58 PM   #16
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I believe I would agree with the post Jeff made above. If it was me I'd probably go to the same battery but I doubt it would make any difference. The 450 amp hours sound correct for T-105's but I'm not familar with the T-120's.
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Old 09-19-2007, 06:18 PM   #17
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Basically, the T-125 is the next step up in capacity from the T-105, at 240 amp hours. The case is the same size.

Up from there the T-145 is about an inch taller, 10 pounds heavier, and 260 amp hours. Above that is the J305 and the L-16. The L-16H is almost 17" tall, weighs 121 pounds, and are 420 amp hours...
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Old 09-19-2007, 06:33 PM   #18
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Boy, talk about a lesson on Trojan batteries.

THANKS!

About the best we can do around here is "Interstate". (or walmart)
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Old 09-20-2007, 08:44 AM   #19
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Oops!, theyre T105's Whata a newb I am
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Old 09-21-2007, 09:15 AM   #20
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I considered the bigger Trojans but was told by the dealer that they're usually special-order items, so if I needed a new one quickly, it'd be tough. I decided to go with the vastly more popular T-105's and got four of 'em. I plan to add two more in a couple months.

Converter-wise... I changed out my stock converter for an IntelliPower unit with the Charge Wizard, to bring the batteries back up quickly when plugged in or on the generator. It seems to be VERY well.

Now if I can just get my solar stuff working properly. I'm so NOT impressed with this Xantrex stuff...

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Old 09-21-2007, 11:17 AM   #21
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As far as I can tell the T-105 is probably the best valuve for the $$$ when you look at it's expected life in cycles.

What size IntelliPower charger did you choose, and how long does it take to charge?

I've been kind of eyeballing those, too.

Vette Racer, what brand is your new converter/charger?
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Old 09-21-2007, 11:21 AM   #22
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Just a quick work about the Progressive Dynamics Intellipower converter. I had a 9155 (55 amp) with a Charge Wizard in my previous 5th wheel. My current 5th wheel came with the 9180 (80 amp), and I quickly added the Charge Wizard.

PD now offers the 92XX series Intellipower converters - the difference being that the Charge Wizard function is built into them instead of being a plug-in adder as it was with the 91XX series.

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Old 09-21-2007, 11:25 AM   #23
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<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">IntelliPower </div></BLOCKQUOTE>Thats what I have also, 80 amp Intellipower with charge wizard.
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Old 09-21-2007, 11:33 AM   #24
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Thanks Rusty and Vette Racer.

I remember seeing the one with the charge wizard built in seemed to be a couple bucks less than the one without plus the charge wizard.

Does the charge wizard display charging mode, or let you change modes remotely? If so, it might be handy. If I upgrade to the unit I'm thinking of, the converter is pretty well tucked away...
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Old 09-21-2007, 11:49 AM   #25
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<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Jeff_in_The_Dalles:
Does the charge wizard display charging mode, or let you change modes remotely? If so, it might be handy. If I upgrade to the unit I'm thinking of, the converter is pretty well tucked away... </div></BLOCKQUOTE>
The Charge Wizard plugs into the converter and has about 2-3 feet of cord, IIRC. The Charge Wizard is a small black box about 2"x2"x3/4" that can be mounted wherever you want, given the cord length limitation. It displays charge mode via LEDs and allows you to change the charging mode through a button on its face (although I've never needed to - the automatic setting works fine).

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Old 09-21-2007, 12:29 PM   #26
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The one I got is the 9100, 45 amp model. They didn't have a 55 amp listed (at RV Parts Outlet) or I woulda gotten it. This one was very reasonably priced at $135 and then I spent another $25 on the charge wizard.

Thanks to my solar charging issues, my batteries had gotten down around 12.1 volts, so I asked the people that ran my storage facility if they'd mind if I left my generator running for the day, and they said no problem. So I fired it up, set the Charge Wizard on Boost mode (it actually can sense battery level automatically and adjust itself, but you can override it if you want), and left it for six hours.

Came back six hour slater, shut it off and went home. Came back the next morning, since the batteries needed time to settle, and they were showing 12.7. I know when I got back to turn of the gen, the charge mode had dropped back to regular, so I figure it switched back automatically when full charge was reached.

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Old 09-21-2007, 02:52 PM   #27
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The old rule of thumb used to be that the maximum recommended charge rate for flooded cell batteries is their amp hour capacity (on 20 hour sclae) divided by 8...

Assuming that's still valid, their 60 amp charger might be perfect for a bank of 4 t-105's...

It might be nice to have the 80 amp charger, though, since they control voltage during charging I don't think they will charge more rapidly than the batteries can handle. Then there would be extra capacity to run lights and appliances while still bring the batteries up at the maximum safe rate...
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Old 10-31-2007, 06:21 AM   #28
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Just a note about the results of the converter/wiring change.

We just got back from 4 weeks out staying mostly at BLM campgrounds without any hookups. Before the change I would run the genset for several hours daily to keep the batteries somewhat up after we had run them down to 1/3 capacity on the monitor. Now when we get up I start the genset while the heater is running, run the microwave and anything else thats needed and within 45 minutes the batteries are back close to full charge. No wires get hot, it all works as I had hoped for, what a difference.
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