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Old 09-15-2020, 11:53 PM   #1
Junior Member
Join Date: Jul 2020
Posts: 3
Newbie inverter question for 1999 Diplomat

Hi all,

I recently bought a 1999 Monaco Diplomat and have been slowly learning about it and fixing it up. It came with a Xantrex 458 Freedom inverter, but neither the input nor the output had any wiring to it. However, the batteries were connected to the 12v inputs

On my Diplomat, the shore power comes in drivers side, rear compartment. The Xantrex was passenger side rear compartment and the batteries are passenger side, second to rear compartment. In the inverter compartment there are 2 breaker-protected outlets.

I have wired the inverter with 2x110v plugs, one on the input and one on the output. When shore power is applied, the 2 outlets have 110v on them from the shore power. So I can plug the input to the inverter to the outlet and charge the batteries.

But if shore power isnít applied and I want to use the invert function of the inverter I have to plug the output of the inverter to the sockets and this powers the RV.

This is enormously error prone and potentially disastrous. If I accidentally leave the output of the inverter plugged into the socket and apply shore power, I will blow up my inverter. The manual shows the inverter being permanently connected to a shore power / generator power input and the output being connected to the RV, but I donít seem to be able to do that. There doesnít seem to be a shore power input into the compartment with the inverter or an easy way of getting it there.

What have other people done with this sort of setup? My way seems very wrong to me and it would be great to hear how this should be done properly.


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Old 09-16-2020, 01:58 AM   #2
Senior Member
Join Date: Jun 2011
Posts: 109
Hi Tim
I have the same outfit in the UK
I canít understand why your inverter isnít already wired into the ring mains.
If you pm me tomorrow Iím back in the rv and Iíll take some photos for you
Or send me your email .
uksteve is offline   Reply With Quote
Old 09-16-2020, 10:36 AM   #3
Join Date: Mar 2019
Posts: 79
This is the way my 2000 Dynasty is wired. Maybe it can help you.
Power from the grid comes in and goes to a transfer switch- the other input side of the transfer switch has the power from the generator. From the transfer switch it goes to the main panel. 2 breakers on the main panel then went to my inverter (L1 & L2).

The inverter had inputs for both legs and outputs for both legs which then went to the inverter sub panel. The main panel had all the high draw stuff you donít want the inverter to run - a/cís, elec water heater, diesel block heater, etc. the inverter sub panel had all the stuff you want the inverter to run, Elec Fridge, outlets, microwave, etc.

That was how my system was setup from the factory. Since my original inverter died, I replaced it with a Victron multiplus - it only works on one leg of power, so I had to change a few breakers around, (on the main breaker the inverter wires needed to come from the same phase -both L1).

Does that help or look like the wiring you see. I think the inverter in your unit May have been attempted to changed out.

Good luck
Michael Loosle
2000 Monaco Dynasty 36í
2018 Jeep JKU
Rocketman3 is offline   Reply With Quote

1999, diplomat, inverter, newbie

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