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Author Topic: inverter  (Read 204 times)

danford50

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inverter
« on: July 30, 2017, 04:45:38 PM »
I have a xantrex/pro inverter it is flashing a code e02, looked it up in the manual and it say red under-voltage shutdown in simply English can someone tell me what I need to do to correct this my motorhome is freedom elite 29 fe
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John From Detroit

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Re: inverter
« Reply #1 on: July 30, 2017, 06:05:08 PM »
Under voltage means one of three things

1: Batteries in need of charge (And possibly not enough battery)
2: Bad connection battery to inverter
3: Cable (battery to inverter) too small or too long
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danford50

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Re: inverter
« Reply #2 on: July 30, 2017, 06:19:14 PM »
when I check my battery it show 100 percent
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SkateBoard

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Re: inverter
« Reply #3 on: July 30, 2017, 06:32:39 PM »
How did you check the battery? How many volts did you measure?

danford50

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Re: inverter
« Reply #4 on: July 30, 2017, 09:08:26 PM »
I check it by looking at the panel which show the battery strength
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SkateBoard

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Re: inverter
« Reply #5 on: July 31, 2017, 12:20:42 AM »
You need to put a meter on the batteries and tell me how many volts.

Lou Schneider

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Re: inverter
« Reply #6 on: July 31, 2017, 12:28:26 AM »
Inverters need short, fat cables between them and the batteries because they draw lots of current when they're powering a load.

All of the connections have to be clean and tight as even a little bit of corrosion can block the current flow.

And the batteries have to be in good shape.  Like a weak car battery can make the headlights dim while cranking the engine, a weak house battery can read 100% under no load but not be able to deliver enough current to keep the voltage up under the heavy demand of the inverter.
« Last Edit: July 31, 2017, 12:36:15 AM by Lou Schneider »

Gary RV_Wizard

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Re: inverter
« Reply #7 on: July 31, 2017, 11:46:06 AM »
The "under voltage" occurs under load, when the inverter is trying to produce 120v power and cannot get enough 12v amps from the battery to do it.   Checking the battery before the load occurs or after the inverter shuts down doesn't prove anything useful.

Since a Xantrex Pro is a minimum of a 1000W inverter, chances are you are powering something substantial and the inverter is trying to get a lot of amps from your battery. 1000W means it could pull as much as 90 amps, which would cause the voltage in any one or two battery system to drop precipitously and go below the inverters minimum (probably 10.5v).

So, first tell us what you are trying to power and what size battery(s) you have. And also what size wires are used to connect the inverter to the battery. 
Gary
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