One would assume it's because he'd like to utilize the additional input for a generator.
Other than that, I agree with you. Rather go with the already certified MultiPlus II 5000.
You can even purchase the variant with a built-in GX device, which neatens the installation.
The 50 or 100 at the end of the model number indicates the size of the built-in transfer switch.
The transfer switch dictates the maximum amount of power you can safely run through the inverter. (Not related to inverter's 5000VA capacity)
In practical terms, here is a "not recommended" example...
Good morning everybody,
My first post! And a bit of self-promotion :cool:
We had the immense opportunity to install Africa's First Barco Freya+ "Cinema at Home" projector. It's a 3 laser RGB light cannon capable of 13500 lumen output!
For more information on the projector itself...