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Old 04-08-2012, 04:18 PM   #15
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"Mastercaster" umm what kind of boat?

The voltage at the batteries when plugged in at home is? Should be 14.2v min.
Do you have a 3 stage charger you can use to charge them after taking them out?
As noted above there may be a few items you'll need to add to your AS tool kit, we all had to do it.

Bob
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Old 04-08-2012, 04:29 PM   #16
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When connected to shore power the batteries should be receiving a charge from the converter and at the same time providing 12VDC power for lights and Fantastic fan. In fact depending on the size of the converter and model it should be able to power the jack with no battery in the Airstream.

Sounds like the converter has failed and you were running on battery & solar power with no assist from the converter.
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Old 04-08-2012, 04:33 PM   #17
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Master aster, have you checked your battery terminals for good connections? Last year we had funky things going on while camping where the solar panel was showing flaky number rapidly. Tracked it down to a loose terminal connection.
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Old 04-08-2012, 08:26 PM   #18
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connections were all good. i could not have been running only on battery as the a/c was running, microwave was used, coffee maker etc... no way in my mind those things ran on battery and solar. i ran the batteries up to the auto parts store and they hooked them both up and said they were showing between 10-11volts (dead). i too thought originally that it was the converter, but when we got home and plugged in, everything worked (except battery charging). a good surge protector actually did cross my mind while camping, and is now on the list. i have a surge protector and power conditioner in my home. cheap insurance. i will do it for the trailer too. also, the park was completely full. and i mean not a single spot available. maybe they had some power issues being overloaded. i am going to check with airstream dealer tomorrow and see if the batteries are warrantied. hope that's all it is.
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Old 04-08-2012, 08:27 PM   #19
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Quote:
Originally Posted by ROBERT CROSS View Post
"Mastercaster" umm what kind of boat?

The voltage at the batteries when plugged in at home is? Should be 14.2v min.
Do you have a 3 stage charger you can use to charge them after taking them out?
As noted above there may be a few items you'll need to add to your AS tool kit, we all had to do it.

Bob
a kayak when i use a boat, but actually a fly fisherman. prefer very small rivers and streams.
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Old 04-09-2012, 12:05 AM   #20
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A measurement of 10.5 volts often indicates that one cell in a 12-volt battery is shorted internally. As a battery ages, lead-sulfate precipitates out and builds up at the bottom of the cell until it shorts all of the plates together. The output of this cell is zero, and the voltage from the remaining cells will total about 10-11 volts. The "sulfated" cell becomes a high-resistance short, which limits the current available from the remaining good cells, since it must pass through this "resistor". Thus, low-current lights, etc. may work OK. However, any 12-volt appliance, an inverter, etc., that draws high current through the shorted cell will see a drop in voltage and current to unusable/ineffective levels.

Sometimes, recharging a battery will convert the lead-sulfate solids back into solution, returning the battery voltage to 12-13.5 volts. This may work, but permanent failure may not be too far off. Personally, I'd attempt to charge both batteries for an extended period (a couple of days), and then test again. However, it is probably time to start looking for some new batteries.

If you suspect a defective converter, you may wish to try installing a couple of loaner batteries to see if your problems go away. However, assuming both are defective, installing new and better batteries, and a battery isolator switch will improve your chances of longer battery life on the next set.
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Old 04-09-2012, 01:45 AM   #21
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Three must haves.

Hi, I have, and suggest, that every trailer has these three things; And they don't cost much. First thing is a polarity tester. [very important to have] I have one plugged into a kitchen outlet and it is the first thing checked after plugging into shore power and before turning anything on. Next, I have a Kill-A-Watt, also plugged into an outlet in my kitchen; It mostly tells me what voltage I have coming in and cycles. [Hz] And lastly, I have a DC [12 volt system] battery voltage checker.
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Old 04-09-2012, 02:56 AM   #22
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All good suggestions... Slight variation; I plug the polarity tester into the campground power box to test it before connecting the shore power cable. Never thought about leaving the Kill-a-Watt plugged in all the time to monitor the voltage -- excellent idea!
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