all DC appliances are failing!!! help

Have you measured the battery voltages?

I would disable the charger in the converter and for the moment hook up an automotive SMART CHARGER to charge the batteries.. NOTE: Some smart chargers are one pass. Bulk, Absorption Float.. forever (till you shut them off and reset)

Some will switch back to bulk if needed. and re-cycle automatically without a manual reset.

If this fixes it get the inverter/charger serviced.

-OR-.

Put a Progressive Dynamics 9200 in parallel with it..

Fact: I have a very nice Inverter/Charger (prosine 2.0) but prefer the PD 9180 with Wizard (Same as the 9280) for battery charging,, I just like the program better in the Wizard.

kokosfriend wrote:
OK! Checked the connections and they are not loose, but it still coulod be a bad battery or a converter that I can't find!!

Even if they are not loose there could be a bad connection due to corrosion under the clamps. Remove the cables, clean the inside of the clamps and the surface of the battery posts then reconnect. Do one at at a time OR take a picture of all the wiring so you don't have any problems when reconnecting them.

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When you checked the battery on the control panel, were you still connected to shore power? Unplug the camper and then check the battery level. If batteries are going bad the converter will still be putting out 12 V power and the control panel will see the 12 V from the converter. With the camper unplugged the only 12V will be from the batteries.
Brian

Remove the fuse on the Magnum DC + wire. Does everything now work OK assuming the batteries are charged of course?

kokosfriend wrote:
OK! Checked the connections and they are not loose, but it still coulod be a bad battery or a converter that I can't find!!

The ME2012 is a charger/inverter so you found it.

Have you checked the 12V fuses? None of the things you mention run off the inverter...

This says it is an Inverter charger.Manual
Page 46 has troubleshooting. I would be looking for a bad connection. Clean the battery cable connector and those on DC input fuses.

OK! Checked the connections and they are not loose, but it still coulod be a bad battery or a converter that I can't find!!

See what happens when you shut off the charger from the magnum control panel. It sounds like bad/disconnected batteries to me.