Holiday Rambler Magnum Inverter

[Driver4u]

Good day to all. I have a question about replacing my Magnum Inverter in my 2007 Holiday Rambler Scepter 42PLQ. I'm doing a complete solar upgrade to the coach and I have all the components installed and waiting to wire them in. When I went to swap the wiring from the Magnum inverter to the new Victron 3000 2x120 I noticed that the wires in the Magnum were only (2) 12/2 wires one labeled GFI and the other labeled Galley these were the Hot out. Then there was a 10/2 wire going to the Hot in side. I know now that I have to re direct the wires coming out of the Transfer Switch to run through the V3000 and back to the control panel. My question is what do I do with the 12/2 wires and the 10/2 wire that went to the Magnum Inverter.

[Allstops]

If yours is wired like mine (2007 HR Ambassador), I have a 30-amp breaker in the panel that feeds Magnum AC in, then the AC out to the 2 circuits (in my case 1 is microwave, and the other is a variety of receptacles through the coach) uses the breakers in the magnum and does not pass back through the panel so far as I can tell. I would think you would still need that 10/2 connected to the AC in of the Victron so when you are on shore power it passes through to those circuits.

[d23haynes57]

Stay with the single leg approach and replace as is. The 10/2 is fed by a 30 amp breaker. That will support pass through 3000 watts. That inverter should have load reducing capability so that as you approach the 30 amp limit the battery charging will be reduced to stay under that combined.
For the output you will need to provide over current protection to replace what was in the old inverter. Best is another panel, feed with 10 gauge for 30 amp and then breakers for each of the branch circuits.

[CA in CA]

Originally Posted by Driver4u

Good day to all. I have a question about replacing my Magnum Inverter in my 2007 Holiday Rambler Scepter 42PLQ. I'm doing a complete solar upgrade to the coach and I have all the components installed and waiting to wire them in. When I went to swap the wiring from the Magnum inverter to the new Victron 3000 2x120 I noticed that the wires in the Magnum were only (2) 12/2 wires one labeled GFI and the other labeled Galley these were the Hot out. Then there was a 10/2 wire going to the Hot in side. I know now that I have to re direct the wires coming out of the Transfer Switch to run through the V3000 and back to the control panel. My question is what do I do with the 12/2 wires and the 10/2 wire that went to the Magnum Inverter.

I installed the same Victron inverter in my HR Vacationer. Ignore what the other posters are saying. They are dead wrong as the Victron 2x120 was specifically designed for your application. They are not professional system builders or Victron Dealers.
I did it the right way and the two 12/2 and 10/2 were just used for an additional circuit I installed for charging an electric vehicle or running a high current tool, like welder.
From the transfer switch location, you need to run two 8/3 or 6/3 (it's a two leg inverter) wires to the Victron inverter. Then, rearrange the breakers in the panel so you "light up" all circuits in it and not just the ones the Magnum used to service. If we have the same Progressive Dynamics breaker panels, the panel is divided into two parts. It's really two breaker panels in one. If it's the same.
If you kept the magnum, there is a great value to using this in the setup as an additional 2000w when needed. Victron inverters support adding another inverter in series using the Power Assist feature. So, in my setup, when needed, I get 5000W of power to my main power panel and everything can run in the coach without power overload or temperature overload. Send me a PM if you want more details or I can assist on the build if you are somewhat local.

Good Luck.

[CA in CA]

Originally Posted by d23haynes57

Stay with the single leg approach and replace as is. The 10/2 is fed by a 30 amp breaker. That will support pass through 3000 watts. That inverter should have load reducing capability so that as you approach the 30 amp limit the battery charging will be reduced to stay under that combined.
For the output you will need to provide over current protection to replace what was in the old inverter. Best is another panel, feed with 10 gauge for 30 amp and then breakers for each of the branch circuits.

No disrespect, but absolutely 150% wrong way to do it and you are losing functionality of the Victron's many many features by doing this. It is designed for a RV's 50A, two leg service.