Not available for larger arrays. The pole is usually just common schedule 40 pipe, set into the ground with enough concrete to keep it stable. Some are mounted higher to protect from snow, vandals and thieves, livestock and elk. Easy to install - needs only one single anchor hole. Available in sizes up to 24 panels.
Panels are much easier to wire up than most other mounts since the underside is easily accessible.
Will withstand 125 MPH wind if well anchored. Tilt angle is easily adjusted for seasonal variations. Available for almost any type and quantity of panel, including many obsolete ones. Tracking mounts are just what the name says - they track the sun through the day. The Zomeworks Tracker is very similar in appearance to the top of pole mount.