Andy ,
The water tank is 90 lt , it can be filled from the side of the pod , I dont know the brand I found it at a caravan parts store (carac) $230 , gravity fed (no pump) , On the panels, they were fitted when I got it I still dont know how big they are ! , it has a pirana battery manager and 12v curcit breakers fitted , the system seems to keeping everything charged , time will tell though !