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Auxiliary Battery losing power

Old 08-10-2013, 11:57 AM
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Angry Auxiliary Battery losing power

I have a Glacier Bay 3430 with twin Yamaha 300's and three switch electrical selector. We are out for an overnight stay, but the auxiliary power runs down within 30 minutes. Much to the annoyance of ourselves and the anchored boats around us we need to run the generator otherwise the smoke and other alarms start going off when the power runs down.

I have played with the three switch selector hoping we could run off the the other batteries, but this doesn't work and the alarms start going off again. I have switched over to the outboard motors as these are quieter to run. Is this my only choice until we get it look at? Help!
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Old 08-10-2013, 12:29 PM
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Can you provide the following ?

House bank desciption? How many batts ? what size ?

House bank age ?

What kind of loads are you running during this 30 minutes you mention ? Lights ? if lights are on.... are they LED ? etc etc etc etc etc.

Do you have readings on the house bank, and if so, when you anchor, what is the state of charge, or volts ?

Happy to try and help.
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Old 08-10-2013, 12:32 PM
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What is the condition and size of the aux Bat? What are you using before it goes dead? Lights, stereo,
whatever.
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Old 08-10-2013, 12:37 PM
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I doubt he is running anything that drains it in 30 minutes except maybe some air conditioner or something!!!
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Old 08-10-2013, 01:00 PM
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"otherwise the smoke and other alarms start going off when the power runs down."

Smoke is not good. Please provide some more information about where this smoke is coming from.

Normal modus operandi is to have one battery dedicated to each motor and one (or more) batteries dedicated to all else.

Let's assume (you tell us what you actually have) that just one house battery is installed. What are you operating with that one battery when both motors are turned off?
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Old 08-10-2013, 01:09 PM
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Originally Posted by jethro1 View Post
"otherwise the smoke and other alarms start going off when the power runs down."

Smoke is not good. Please provide some more information about where this smoke is coming from.

Normal modus operandi is to have one battery dedicated to each motor and one (or more) batteries dedicated to all else.

Let's assume (you tell us what you actually have) that just one house battery is installed. What are you operating with that one battery when both motors are turned off?
I think he means the "smoke alarms", and the "other alarms" start going off, due to low voltage threshold being breached.
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Old 08-10-2013, 03:25 PM
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might check the nuts on the back of the switch you didnt mention the style or brand , i have a 22ft and mine was acting up on bank 2 like that , turns out it was fine on {all} and bank{1{ when on bank 2 it would die fast..in a few minutes apparently the lug on the back was loose and that battery was getting a partial charge depending on what bumps and wave action we got cleaned the terminals with coke and had 1/2 turn left so im guessing it just backed off from vibrations over the last 2 years
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Old 08-11-2013, 04:07 AM
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We got back to the marina first thing this morning. I will call the specialists on Monday. The volts were full and we had everything turned off, except the anchor light. The volts ran from 1340 to 750 within 30 min. All we could do was run the generator, but it was to load and we ran the outboards for a few hours until the sun came up. I would of thought that switching the switch on the selector over to combined would of fixed it temporally. This did not work.

I will see what the experts say tomorrow. Thanks for your all help. Looking forward to a good nights sleep!
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