HQST Adjustable Solar Pannel Tilt Mount Brackets for Roof, RV, Boat and Any Flat Surface,for Off-Grid Systems

Q: why the 150W limitation? Is the limitation really weight? how much weight they can handle?

Hello, it can support panels of 150W and below because the bracket has a maximum installation width of 28 inches and is capable of supporting over 25 lbs.

Q: Let’s say I have these facing toward the east for sunrise, can I then tilt them the other direction as the sun goes west?? Thanks

No. you will have to reposition the frame on the roof. Facing the panels south will allow them to catch the sun for most of the day.

Q: How is it secured to the soil ground?

It's designed to mount on brackets, channel or a roof, not on soil. I supposeyoucoulx lay out a couple 2"x4" pieces of wood and mount it to them. You could also just set them on the ground.