Scamp battery discharging when stopped and still connected to tow vehicle.... - Page 2 - Fiberglass RV


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Old 10-14-2015, 04:40 PM   #15
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I thought fully charged was just under 12 v?
.
Nope. If its reading under 12 its actually starting to get well down in discharged. For example at 11.9 its actually only at 40%.

Many here who like to keep a healthy battery on the trailer do not normally run it below 11.75 which is 30%.
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Old 10-14-2015, 04:47 PM   #16
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I had something this and it turned out to be a worn out battery.
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Old 10-15-2015, 09:40 AM   #17
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Based on your conception of full-charge voltage, I'm going to agree with Byron. Your battery probably has not received (or taken) a full charge for a long time. My 12V battery in fairly good condition, fully charged and resting awhile after charge completion, usually read about 12.85V. 12.1V is considered about 50% charged. If yours stays under 12V... it's time to play "Taps" over that battery.
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Old 10-15-2015, 10:25 AM   #18
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Thanks everyone. I plugged into the inverter overnight and unplugged it this morning. Will investigate with multimeter tonight and see what I want to do. I have two more Scampouts left this season and it's going to be below freezing temps, so I anticipate buying a new battery .
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Old 10-15-2015, 10:50 AM   #19
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I had my Casita plugged in yesterday while I did some cleaning. It's has a simple older Parallax 6325 converter. After finishing my cleaning I unplugged the shore power and this morning the battery voltage was 13.0 volts and the overnight low temperature was 36 so the surface charge should have been gone.

I agree your battery is toast and if you do a lot of boon dock camping I would NOT buy a new fancy converter and instead buy a fancy battery charger that you could also use on your TV or any thing else with a 12volt storage battery.

Joe
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Old 10-15-2015, 10:57 AM   #20
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Thanks everyone. I plugged into the inverter overnight and unplugged it this morning. Will investigate with multimeter tonight and see what I want to do. I have two more Scampouts left this season and it's going to be below freezing temps, so I anticipate buying a new battery .
I think you meant to say Converter, the big question is what was the charging voltage at the battery when it was turned ON. If that's much below 13.5 volts you will never get a full charge
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Old 10-15-2015, 11:07 AM   #21
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Doghaus
I had my Casita plugged in yesterday while I did some cleaning. It's has a simple older Parallax 6325 converter. After finishing my cleaning I unplugged the shore power and this morning the battery voltage was 13.0 volts and the overnight low temperature was 36 so the surface charge should have been gone.

I agree your battery is toast and if you do a lot of boon dock camping I would NOT buy a new fancy converter and instead buy a fancy battery charger that you could also use on your TV or any thing else with a 12volt storage battery.

Joe
The Parallax 6300 series are well known for their capability of overcharging and boiling batteries if not monitored. Parallax and American (brand) are the two converters that I have puled out when installing new power centers.They don't have any charging regulation and, if still at 13 volts, your battery must have gotten hit pretty hard when charging.

A good converter with a 3 stage smart charger is a fairly inexpensive way to up date the electrical system as well as improve battery performance and life.

My PD-4045 is plugged in 24/7 when I am at home, and my cheapo HF battery charger is in the garage for when the neighbors need it.
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Old 10-15-2015, 11:28 AM   #22
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The Parallax 6300 series are well known for their capability of overcharging and boiling batteries if not monitored.

Bob.

I knew you or Byron would say something about that

There are instructions on how to adjust the float voltage to 13.6 on a completely charged battery at 72 degrees on the 6300 series converters. I followed them and have never had to add water

Joe
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Old 10-15-2015, 11:31 AM   #23
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Bob.

I knew you or Byron would say something about that

There are instructions on how to adjust the float voltage to 13.6 on a completely charged battery at 72 degrees on the 6300 series converters. I followed them and have never had to add water

Joe
Good to know, most 6300's I have encountered aren't set that accurately, usually very high or very low. And the owners think that a voltmeter is that "Thingy" on the dash of the TV !!!


And just to clarify, the manual also sez:


"Service information provided solely for use by Licensed Electricians and Certified RV Technicians"


Which will scare away most users.


http://www.hayseed.net/~jpk5lad/RV%2...%20Binder1.pdf
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Old 10-15-2015, 11:34 AM   #24
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You can take that battery to a battery store that specializes in auto batteries. They'll put a full charge on it and then load test it to see if it has a problem. Easy thing to and either confirm or eliminate one failure point.
Most places I've done this with don't charge for the service.
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Old 10-16-2015, 07:39 AM   #25
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update: after plugging into the converter (The original - American brand) for one night and letting it sit unplugged with nothing "on" all day the multimeter test read 11.89. Needing to make a decision and having very little time to battery shop before my last boondocking trip ( just one overnight ) this weekend, I turned on the heat and left it overnight to see what would happen. This morning the heater was still able to run, lights (LED) could work, and the battery read 11.5. I turned off the heat, plugged the converter back in, waited two hours, it now reads 12.32 while charging on the onboard converter.
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Old 10-16-2015, 09:09 AM   #26
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Sounds like a) your battery is suffering from age and under-charging and, b) your converter isn't putting out enough (12.32 volts) to ever fully charge the battery. I'd just pop into Wal-Mart and get a new battery and sort things out after the weekend with a new battery in place. Be sure the new battery is "Fully Charged" when installed, i.e., over 13.0 volts.
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Old 10-16-2015, 04:51 PM   #27
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Buying a new battery is quick and easy at a Walmart or at most auto parts stores.

If you want to get by for one more night, one thing you could try: put an automotive battery charger on the battery for a half-day or more. Not sure if it will help, but it can't hurt.
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Old 10-19-2015, 10:30 AM   #28
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Update: Survived the one New England night with ample heat and normal use of water pump and LED lights. Battery was at 11.9 when I arrived at destination and detached car from Scamp, then 11.5 right before I hitched up to drive home the next day. I guess I don't really use that much electricity with what I normally do.
Last Scampout for the year is this coming weekend, where I will have electric hookup. (and yes, one year I did run out of propane at this event, so I weighed my tank last week lol) Then I put everything away for the winter and will get a new battery in the spring and a smart charger to go with it. Thanks everyone!
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