Community Forums

Diesel Boats · 07-22-2021, 01:26 PM

I have a 2019 Dutch Star that has just recently had the Magnum Inverter fail. The warranty requires me to uninstall the inverter and deliver to a authorized repair center. Has anyone had this issue with Newmar Coaches? Also, repair center says to disconnect the battery from the inverter prior to removing but I cannot find a switch in the power compartment, just individual switches. Any help would be appreciated.

tom chelbana · 07-22-2021, 01:39 PM

The Inverter for the DS is between the frame rallies between the 1st and 2nd cabinets. The unit is heavy around 40 lbs so be careful. Make sure to turn off power to inverter before disconnecting cables.
Newmar Man

ChrisFSB · 07-22-2021, 02:03 PM

At least on 2020; there is no battery disconnect switch. So you’ll need to unhook inverter at the battery bank.

Also be sure to kill the AC breaker which powers the inverter with 110 volts.

The magnum manual has a warning as to the correct sequence for the battery unhook.

Dutch Star Don · 07-22-2021, 02:25 PM

If you go into your battery bay, you'll see three large red cables, running from the batteries to right side wall (as you're looking into the bay). On that wall is a large fuse with a cover over it. Looks like a large bandage. On Magnum inverters, you always disconnect the POSITIVE side of the battery/cable going to the inverter. You can disconnect at the battery, or either side of the fuse.

There will be a couple of telephone style cords plugged into the inverter. They're color coded. Take your phone and snap a couple of photos of which ports they plug into. Disconnect the battery cables and remove.

Once you get it rebuilt and working, it may be a good time to add the improved controller ME-ARC50 inside the coach (panel above driver) and the BMK shunt. These two items give you more information and control of your inverter. Instead of the inverter telling you that the batteries are at 12.7, 12.8, etc, it tells you State of Charge (SOC) which will be in percentages, 80%, 90%, 100% etc.

Both items are relatively easy to install. The ARC50 just replaces the controller you have now. The BMK is mounted to the batteries and plugs into the inverter. There is a post about the BMK and how to install, running now.

https://www.amazon.com/MAGNUM-MAGN-M...s%2C222&sr=8-3

https://www.amazon.com/Magnum-Energy...6984512&sr=8-2

txcpl · 07-23-2021, 05:01 AM

I just replaced the converter in my coach. They are not light in weight. Mine was mounted on the ceiling of a storage bay. Not a problem to disconnect and remove, but very awkward to re-install. Used a small jack to lift the unit for mounting.
Be sure to disconnect the RV from all electrical connections and disconnect the batteries prior to removing the unit.