The first thing I notice is the obvious age of the equipment. I haven't seen green 'Bell' covers for quite some time.

Still, (surprising no one) I'm going to disagree with a few of the other comments.

I agree that the white PVC is incorrect, especially the elbow.

I see nothing wrong with the roof jack used for the mast, It appears identical to the ones at the local supply house. As for running the water line throught the same roof penetration, I don't see any code issues; one might say avoiding a new roof penetration is a good idea.

As for the receptacle mounted on the side of the panel .... I have seen quite a few panels of various sorts come with such a provision for a receptacle, either in the outer box itself, or in the dead front. I don't see any particular code or listing violation. As for the weather-resistance of the resulting enclosure, I would think that the receptacle cover maintains that - especially if the supplied gasket is used.

The instal may very well pre-date code requirements for GFI protection, bubble covers, having any outdoor receptacles, and securing the back-fed breaker.