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Old 07-11-2010, 04:07 PM   #1
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magnetek 7400 should i change it or

i have purchased trojan gel batteries to my 1997 adventurer, and planning to put them in.
in the rv is magnetek 7400 inverter 45 amp.
i am not sure if i can use it for gel batteries, i don't want to damage my beautiful new batteries.
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Old 07-11-2010, 06:39 PM   #2
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It's a halfway decent charger, but does not have a setting for Gel type batteries and Gels do take a different charge profile.

But are you sure you have Gel type batteries? AGM is not Gel, nor is a "maintenance free" battery. Gels are very expensive and not many dealers carry them, so you don't see them in RVs very much. No particular advantage over AGMs, either.
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Old 07-12-2010, 07:05 AM   #3
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thank you for replay.
i am shure , these are gel batteries.
i got unbelievable good deal on them, some one else ordered batteries , but the lady made a mistake when filing up the form....
any way i paid really good price, was afraid maybe is something wrong, but the voltage was 12.43V and i have warranty, so took the risk.
the shop is not for rv, is for trucks, and this is in europe.
on the picture attached is my set up, now i am bulding metal frame.
on the battery it says that should lower the voltage to 14.2V when charging, and in manual of magnetek is writen maximum 14V.
so seems ok.

i also think of puting discontect switch, so when i am pluged in to shore line, after some time i will be able to disconet the batteries and not charge them.

what do you think ?
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Old 07-12-2010, 02:23 PM   #4
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This document shows Trojan's recommend charge limits for their Gel batteries. It shows a max of 14.4v (2.4v/cell) and a shift in charge profile at 80% charge rather than 90% for flooded cell batteries. I have no idea what the charge profile for the Magnetek/Parallax 7400 looks like. Good luck!

http://www.trojanbattery.com/Tech-Su...nglish_003.pdf
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