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Old 10-03-2022, 07:38 PM   #1
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Overcurrent

Good evening all,

Getting ready for a trip and plug my rv with surge protection in on Friday for the refrigerator. On Saturday, I turned the battery master switches off to work on my 12v batteries (clean & tighten) forgot to turn switches back on. Today, I went out to find my inverter with the overcurrent code blinking and the refrigerator was off. First went to my surge protection, no exceptions, unplugged rv, turn battery switches on, replugged rv and turned on refrigerator. I live on the New Jersey coast and it has been raining since Friday afternoon with occasional loss of power. Can anybody give me a cause or suggestion on why my inverter went to overcurrent?

Thanks and as always safe travels,
Pat M
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Old 10-03-2022, 07:43 PM   #2
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Does your battery switch need to be "ON" in order for the converter to charge the batteries like in many RVs? If so, the batteries got too low for the inverter to get enough to keep up.
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Old 10-03-2022, 07:45 PM   #3
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Did you check the voltage on the batteries when the inverter was shut down? If the inverter has been running since Saturday not plugged in chances are the batteries dropped below the low voltage cutoff for the inverter.
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Old 10-03-2022, 11:47 PM   #4
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Old 10-04-2022, 07:56 PM   #5
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What the others said. The inverter was NOT disconnected from the batteries and kept on running. As the battery voltage falls, the current draw goes up to produce the wattage the inverter is trying to produce. At some point the inverter shut down because the demand was too high for the available battery power.
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Old 10-05-2022, 01:56 PM   #6
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Overcurrent

Quote:
Originally Posted by Gary RVRoamer
What the others said. The inverter was NOT disconnected from the batteries and kept on running.
Not unless a 1999 Monaco's DC system is wired really wrong. An inverter should never be wired directly to the house batteries.

Yes, the inverter would keep running because the motorhome was plugged in and the converter was supplying power to run the inverter.

But it's certainly possible that the converter does not have enough power to run the inverter by itself as the loads cycle on and off. It may rely on the house batteries partially to provide additional DC power for peak loads.

Quote:
As the battery voltage falls, the current draw goes up to produce the wattage the inverter is trying to produce. At some point the inverter shut down because the demand was too high for the available battery power.

With DC, which an inverter runs on, as the voltage drops so does the current. An inverter is not an inductive load.

But we're lacking some basic information.

Is this a residential refrigerator or an RV propane/electric refrigerator?

If a residential refrigerator is this the main inverter, an inverter just for the fridge, or what?

WHICH overcurrent was indicated? The DC input power or the AC output power?

What is the make and exact model of the inverter?

What is the make and exact model of the converter?

Without that information everyone who is not fully familiar with a 1999 Monaco Executive is just guessing. And it's certainly possible that changes were made over the past 23 years from stock.

Ray
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Old 10-08-2022, 06:29 PM   #7
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Hello all,
I apologize for the late response as I am traveling. I am in the beautiful state of Maine. I have a Norcold fridge, Trace inverter and a ECSO Power 50 Transfer Switch. After I found the over current light blinking the RV started right up. I flip the switches and have no problems? I canít figure it out? But a new trip equals a new problem. Thanks to all who responded.

Thanks again and as always safe travels,
Pat M
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Old 10-09-2022, 11:39 AM   #8
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Quote:
Not unless a 1999 Monaco's DC system is wired really wrong. An inverter should never be wired directly to the house batteries.
I and several motorhome manufacturers disagree, but that's not important here. What matters is whether the inverter is disconnected by the Battery Disconnect switch. There are pros and cons of both wiring designs.

Quote:
Yes, the inverter would keep running because the motorhome was plugged in and the converter was supplying power to run the inverter.
The inverter is also the converter here, i.e. it charges the house batteries and provides 12v to the house when shore power is present.
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Old 10-09-2022, 07:55 PM   #9
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"An inverter should never be wired directly to the house batteries"

Then how does the inverter charge the house batteries ? Or of that matter, invert the batteries ? Me confused.
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Old 10-10-2022, 01:03 PM   #10
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Quote:
Originally Posted by Iceclimber View Post
"An inverter should never be wired directly to the house batteries"

Then how does the inverter charge the house batteries ? Or of that matter, invert the batteries ? Me confused.
It gets wired after the battery disconnect contactor. Connecting the batteries allows the inverter/charger to charge the batteries when the batteries are connected and with the batteries disconnected the inverter function will not rapidly kill the house batteries.

The inverter function is a massive power suck. 10 amps being pulled from the batteries results in less than 1 amp being available at the 120 volt outlets.

Even with nothing plugged into an outlet an inverter can still suck multiple amps out of the house batteries. That's not a parasitic drain, that's a large drain.

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