I see in the installation instructions that they use a split bolt (split nut) connection to tie into the neutral at the meter can. The pic clearly shows a copper only split bolt connected to aluminum wires.
This aside, anything before the first means of disconnect is service equipment. As such, this device must be rated for service use. Nowhere, that I could find is this device UL or CSA tested, listed and approved.
Also, as has been stated, this device is a clear means of eliminating the electrician from the installation. I know I am biased, but, elimination of the electrician is always a recipe for disaster. The service wires coming in have no O.C. protection. Homeowners should never be allowed to mess with them.