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Old 07-14-2017, 03:32 PM   #1
Bob & Clestine
 
2017 20' Flying Cloud
Cosby , Tennessee
Join Date: Jun 2017
Posts: 23
Batteries charging at 18V?

We have a 2017 Flying Cloud 20 foot with solar and 2 AGM batteries. Just returned from a trip and plugged the trailer into 20 amp service at home and noticed the batteries are charging at 18 volts per the Solar Panel and the regular monitor panel. The trailer is under covered parking so no solar. Both batteries read 14.0 volts by the panels and voltage meter when unplugged. Trailer is currently unplugged. Never had this issue before when plugged in to 20, 30, or 50 amp service.

Any ideas on the cause?

Thanks!

Bob
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Old 07-14-2017, 04:45 PM   #2
Half a Rivet Short
 
2017 30' Classic
Carlisle , Pennsylvania
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Hi

If indeed your batteries are charging at 18V when on shore power that's not a good thing. If you have the stock converter / charger, it's broke. If you have an aftermarket unit, it's either broke or not set up correctly.

A multimeter on the battery posts would quickly tell you if the 18V is real or not. There are some really odd ways it could be ok, but reading wrong. If it is at 18V, shut down and get it serviced.

Bob
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Old 07-14-2017, 07:53 PM   #3
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2015 28' Flying Cloud
Newtown , Pennsylvania
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Possibly the battery switch is in Store mode?

Bruce
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Old 07-14-2017, 08:05 PM   #4
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Quote:
Originally Posted by AstroBruce View Post
Possibly the battery switch is in Store mode?

Bruce
Hi

Still should not give you 18V on anything other than the output of the solar panels. With the panels in darkness, they aren't going to get to 18V. Out in the sun, sure, you'll see 18V and that's a likely goof. Maybe the storage area has light coming in through a bunch of un-mentioned windows ... who knows ....

Bob
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Old 07-15-2017, 09:34 AM   #5
Bob & Clestine
 
2017 20' Flying Cloud
Cosby , Tennessee
Join Date: Jun 2017
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The voltage at the batteries is 18 volts when checked with a volt meter while connected to 20 amp shore power. Voltage at batteries drops to 13.7 when shore power unplugged. The factory installed solar power monitor shows 0 volts coming from the 80 watt solar panel. Both the solar monitoring panel and the SeeLevel panel will show 18 volts when connected to shore power and
13.7 volts when disconnected from shore power.

I have the trailer disconnected from shore power and in store mode now, do not want to cook the batteries.

The trailer comes with 2 battery chargers...the Parallax for shore power and the PVCM25D for the solar panel. Not sure if they work together but the problem seems to be with the Parallax when connected to shore power.
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Old 07-15-2017, 12:09 PM   #6
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Agree with Uncle...something is wrong with your Parallax. Stop using it until you can check it out further; otherwise you will fry your expensive batteries!
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Old 07-15-2017, 12:17 PM   #7
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At 18 volts, the batteries are already toast.

Bruce
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Old 07-15-2017, 12:22 PM   #8
Bob & Clestine
 
2017 20' Flying Cloud
Cosby , Tennessee
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How do I troubleshoot the Parallax charger? The Parallax website did not have any info I could find.

I think the batteries are OK as I caught the problem as it happened. time will tell.
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Old 07-15-2017, 12:44 PM   #9
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This is a sign from above and I am surprised the other posters haven't already said this: the Parallax is a piece of junk and this is now a good time to replace it. Contact Randy at bestconverter.com.
He sells converter/chargers to a lot of us.
Larry
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Old 07-15-2017, 03:47 PM   #10
Bob & Clestine
 
2017 20' Flying Cloud
Cosby , Tennessee
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The trailer is only 2 months into the 2 year warranty so I am reluctant to replace the Parallax charger. Replacing it by myself would be a lot easier than towing it to the dealer, 70 miles, dropping it off and the going back to pick it up after the work is done. Probably cost me more for gas and wear and tear on the trailer/TV than the upgraded charger. I think I could do the upgrade install in about an hour.

I will contact Jackson Center on Monday to see what they can offer.
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Old 07-15-2017, 03:53 PM   #11
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See if you volt meter is accurate. Check it against another 12v source such as your TV battery. If it is OK, I suspect the converter is bad. it could have been a lightening strike. In this case check other 12v items for damage. Call your insurance carrier.
guskmg
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Old 07-15-2017, 04:01 PM   #12
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There are several things that could be wrong. I would measure at the battery with a volt meter. If the voltage is that high the batteries are bad. Since you are getting 13.7 or so with no power on them I am thinking that is not the case. Assuming the batteries are good putting enough current into them to get to 18V would take a very large converter. Cables could be loose or corroded going to the batteries.

Perry
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Old 07-15-2017, 04:10 PM   #13
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Your issue should be covered under warranty. As long as the dealer can duplicate the issue, there should be no reason not to have them fix it. And replace you batteries if they got fried.
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Old 07-15-2017, 04:22 PM   #14
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2017 30' Classic
Carlisle , Pennsylvania
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Hi

You are fully in warranty with a piece of trailer that has failed - get it replaced under warranty. If the batteries are also impacted, get them replaced as well. If there is other damage (18V is *not* what 12V gear expects to see ...) get it replaced at the same time.

The converter / charger is a block as far as working on it. Indeed you could dig into it at the component level if you have a bunch of test gear. People stopped doing it that way back in the 1980's. These days, the whole thing comes out and gets replaced.

I'd call the dealer and see what they have to say. They might drop ship you a new converter / charger. They might also want to see it to check for other damage. If they are sharp enough to figure out that can be an issue, you have a 1 in 100 dealer. If they want it back, a better bet is they want to double check your testing.

Lightning is one possible way to bust a converter charger. Random failure is more likely. Even if it's a remote possibility, lightning is worth protecting against. If you don't already have a surge protector, this is a good reason to get one ....

Bob
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