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Old 06-10-2019, 18:22   #1
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trojan 105

what should be a normal full charge
4 6v trojan 105 wired in seris for 12 v
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Old 06-10-2019, 18:43   #2
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Re: trojan 105

The same for any wet cell 12 v battery - 13.2 - 13.5 volts. Having said that, voltage isn’t a good indicator of full - hydrometer density measurement is...

For a single 6 v T105, divide by 2 (for voltage).
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Old 06-10-2019, 18:47   #3
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Re: trojan 105

Assuming you mean charging profile to get to 100% Full?

Absorb setpoint at least 14.8V, measured at the posts.

Can go a bit higher if reducing time spent is important, even 14.9V especially in cool temps

hold Absorb until amps fall to say 2-4A, lower current means higher SoC.

or stops falling for an hour

say 4 hrs max


Then Float at 13.5V

Keep water topped up!


Open circuit resting voltage will be 12.75V, any more is just surface charge.
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Old 06-10-2019, 19:32   #4
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Re: trojan 105

T-105's are really really well documented!
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Old 06-10-2019, 19:49   #5
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Re: trojan 105

The RE versions are different from the main line
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Old 06-10-2019, 19:53   #6
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Re: trojan 105

Did you look at the documentation? They are exactly the same voltage specs.


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Originally Posted by john61ct View Post
The RE versions are different from the main line
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