Scamp battery discharging when stopped and still connected to tow vehicle.... - Page 3 - Fiberglass RV


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Old 10-19-2015, 10:47 AM   #29
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Hmmmm.... I'm wondering if you may have more of a meter problem than a battery problem.


Here's why; at 11.9 volts, which is less than 50% charge, most furnaces can't spin the fan fast enough to trip the sail safety switch. As it turns out, many can't trip the sail switch without a fairly full charge. The .4 drop is about right for one night out when you are at full charge, but starting at a 50% charge I would have expected a faster drop.


Try connecting or plugging in your voltmeter to the TV by itself and tell us what you are reading. That should be close to 14+ volts at a fast idle.
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Old 10-19-2015, 10:56 AM   #30
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Hmmmm.... I'm starting to wonder if you might have a meter problem more than a battery problem. Here's why:


1. 11.9 volts is about 50% of a full charge
2. Most furnaces can't spin the fan fast enough at 50% charge to trip the sail switch and the furnace does not light off.
3. The .4 volt drop for overnight with using the furnace is about right when starting with a full charge, but I would expect to see a lot more drop when starting at a 50% charge.
4. Try connecting your voltmeter to your TV alone and check that reading. It should be 14 volts or more at a fast idle.
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Old 10-20-2015, 04:41 PM   #31
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Thanks Bob, I'll look into the meter question.
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Old 10-20-2015, 05:35 PM   #32
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The American Converter per my discussion with them several years ago indicated that they stopped charging at 12.2 volts.
I didn't much like that so stopped using the American Converter and purchased a Battery Minder and now when the trailer is at home the Battery Minder keeps the battery charged.
When towing the tow vehicle charges.
When in camp about every 3 to 5 day a few hours of solar seems to do the trick.
Meter accuracy is often the cause of problems. Read and understand the specifications that comes with your meter.
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Old 10-27-2015, 05:23 PM   #33
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Quote:
Originally Posted by Byron Kinnaman View Post
The American Converter per my discussion with them several years ago indicated that they stopped charging at 12.2 volts.
I didn't much like that so stopped using the American Converter and purchased a Battery Minder and now when the trailer is at home the Battery Minder keeps the battery charged.
When towing the tow vehicle charges.
When in camp about every 3 to 5 day a few hours of solar seems to do the trick.
Meter accuracy is often the cause of problems. Read and understand the specifications that comes with your meter.
I have an 11 year old American converter and it charges to a full charge.
Was that a Typo?
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Old 10-27-2015, 06:07 PM   #34
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I have a 16 year old 6325 Parallax converter that charges to 14.4 volts. Once there it then drops back to 13.6 volts.

Joe
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