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Old 12-23-2016, 09:54 AM   #1
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Batteries At 12.2

I am plugged into a 20A GFI outlet. I went out today to turn on the fridge for extra Christmas goodies and discovered the GFI had tripped and the batteries were at 12.2. I reset the GFI and it immediately went to bulk charge. Have I killed the batteries? Do I need to do anything else? Thanks.
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Old 12-23-2016, 10:02 AM   #2
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You should be good !
12.2 is the highest I can set my Auto-Genny Start to recharge the batteries...
Would think if that were bad then they would allow it to be set at 12,9 or higher to protect the batteries.

just check your distilled water periodically if it bulk charges too long...

and check why your gfi tripped ! you have too much stuff on in the rv !

shut down everything you don't need, especially electric heaters
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Old 12-23-2016, 10:02 AM   #3
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Originally Posted by bresdogsr View Post
I am plugged into a 20A GFI outlet. I went out today to turn on the fridge for extra Christmas goodies and discovered the GFI had tripped and the batteries were at 12.2. I reset the GFI and it immediately went to bulk charge. Have I killed the batteries? Do I need to do anything else? Thanks.
12.2 is still absolutely 100% ok but I recommend you use a NON GFI outlet for plugging RV into
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Old 12-23-2016, 10:07 AM   #4
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Thanks. Will definitely check the fluid levels as well as changing the outlet.
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Old 12-23-2016, 10:13 AM   #5
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No load six cells of lead acid battery in series voltage, with battery under no load, after cell surface charge from charging has dissipated.

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Old 12-23-2016, 10:19 AM   #6
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12.2 is still absolutely 100% ok but I recommend you use a NON GFI outlet for plugging RV into
Now that's just plain stupid, The GFCI is telling you that there's a problem.
Pay attention Class!!!!!!!!!!!
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Old 12-23-2016, 01:13 PM   #7
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If you are only plugged into a 20 amp plug you need to make sure you set your Magnum charger shore power to 15 amps if not the inverter will try to pull more amps to charge batteries and then trip GFi again.
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Old 12-23-2016, 01:17 PM   #8
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Now that's just plain stupid, The GFCI is telling you that there's a problem.
Pay attention Class!!!!!!!!!!!
stupid in your brain maybe but concerns me not;; GFI outlets used for SP never seem to work correctly when feeding a MH system
If there is a short the standard breaker will pop in a heart beat
never use a GFI to feed your MH shore power supply
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Old 12-23-2016, 01:53 PM   #9
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GFCIs Is are for power tools in the yard and hand held appliances near water.

A standard RV outlet, 30 or 50 amp will not have one.

They are Ground Fault Circuit Interrupters, not overload breakers. Very different.

As stated by sellxct55, plug it into a standard outlet or get a 30 amp RV outlet installed.
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Old 12-23-2016, 02:20 PM   #10
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The only thing that is wrong is the air is damp. There is enough leakage across the adapter plug interface in damp weather to trip the GFI. That is why it is poor practice to run something like an RV on a GFI circuit.
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Old 12-23-2016, 02:27 PM   #11
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My GFCI work fine, I use it all the time. I have a 50a service at my main house garage, 30 amp service at detached garage, and GFCI 20 amps at both.

The only time I use greater than GFCI at either parking spot, is in the summer when running both A/C's and getting ready to leave. Otherwise, it is just significantly easier to use a 20a extension cord. I set the converter configuration setting to the minimum possible, to leave the most current for the rest of the devices in the coach.

The batteries are already charged since I drive the coach over, so it does nothing else than trickle charge the banks.
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Old 12-23-2016, 05:10 PM   #12
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Have you killed your batteries?
3 answers
Pure starting batteries (IE: like in your car) Possibly but not all that likely
MARINE/deep cycle (Most 12 volt types used in RVs) NO, I don't believe you have but ..... Well, don't go lower than that

DEEP CYCLE like the GC-2 Golf Car six volt pair Damon gave me (Six volt is used in pairs because wired properly 6+6=12 and you treat the two together exactly as you would a 12 volt size 4D,, but WAY easier to wrangle, lower in cost too)

NO, not even close to damage level, let alone "KILLED".

Your batteries will recover, No tribble.

NOW: you say it tripped the GFCI. There are seveal "Suspects" in an RV that can trip a GFCI, note that GFCI's really don't care much about how much current flows..... Only if the current in the HOT and Neutral are the same...

Suspect 1: The converter: Some times it will trip if the batteries are A:hungry (As yours were when you tested) or B:when they are full.. or C:all the time, or D:Pnever and frankly I can not say that this or that brand will A,B,C,D on that.

Fridge, the electric heat element can partial short in some cases
Water heater: LIkewise
Other devices (any device with a 3 wire plug)
Extension cords, and adapters, if the plug/socket junction gets wet or gets "infected" with insects.

I have a theory that the wires, hundreds of feet of romex, may be enough to trip a GFCI even if there is no fault.

Patio outlets often get wet and trip the GFCI (Though usually the one INSIDE the RV not the house unit)

How to diagnose step 1:
Turn off EVERYTHIGN in the rv and by that I mean go to the breaker box and turn off all of them save the MAIN, now turn ON the one marked CONV or INVER Just the one that charges your batteries, leave all others OFF.. Then .. If the GFCI holds, one at a time turn others back on, check back often since it does not trip right away.. First Turn on an outlet,,, IF the RF is where you can see it plug in a lamp, Floor lamp, Trouble lamp, any kind of lamp.. Hang or place in a window you can easily see from the HOUSE.. now you can check the GFCI from afar. (Saves walking outside).
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Old 12-23-2016, 07:10 PM   #13
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I trip my GFI in the bus storage barn on occasion, and in particular when a thunderstorm goes through you can almost bet its tripped. After having twice experienced drained down batteries due to this issue, I'm planning on pulling the GFI and replacing with a standard outlet.
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Old 12-23-2016, 07:17 PM   #14
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12.2 is about 60% full. Should be ok and the Trojan Signature Series (like my T-125s) will give about 1,500 cycles at that discharge average.
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