Morningstar inverter wiring

Originally posted by bonanddoug You are saying I dont need the ground connection to the input side of the converter, just the plus and minus (with a circuit breaker).

So what exactly is the purpose of adding this inverter?  Doesn't the trailer already have what is needed?

I guess I misunderstood the part about hooking into the electrical system.  I am connecting the DC to the rpods DC system and running a separate outlet for the inverter.

NO!  Make sure you do not bond the AC neutral to ground anywhere in the pod, only the DC negative.  The single bonding point is supplied by the campground connection, by code.  Many smaller generators do not provide the N-G bond so you get a "floating ground" when you are hooked to them, and this inverter is like those generators.  You can create a N-G bond at the generator (which makes it marginally safer) but that is because that N-G bond will disappear when you unplug from the generator and then plug into the power pole at the campground. Things are a bit trickier with this inverter because if you wire it as they show, the extra N-G bond will still exist when you go to plug into the power pole.  Now you'll have two bonds, which is against code, and can cause odd problems due to ground loops - up to and including a fire.  Your two choices are to either leave it as a floating ground, or add an expensive transfer switch which will also switch the neutral.  Those are usually only found in large motorhomes.  Ones found in home backup systems usually only switch the legs, because the N-G bond found in the utility panel is the single bonding point whether on utility power or generator power.

I looked at Morningstar's Documentation. I think that you can tie both the Earth Ground and the - terminal into the Chassis ground on the trailer. Morningstar recommends that the earth ground be a larger wire than the - terminal. You should use separate wires for the Eath Ground - terminal and the AC neutral.