Sunny island inverter

[Scott Mather]

Came across these inverters.
SMA SUNNY ISLAND SI6048-US-10 5.75KW BATTERY inverter
Any good for a marine application?

 

[Boatsb]

Looks like it's designed for grid attached systems. I don't know if I switches the ground or is marine rated.

Not cheap and certainly not something I want to be a test case for.