While the unit includes built-in, fold-out fabric kickstands on the back, its large size of over 8.5 feet and weight of 37.5 pounds mean it can easily act like a sail in breezy conditions, making it highly recommended to use the metal corner grommets to stake or tie the panel down so it does not blow away or fall over.
By vevor
The VEVOR 400W Foldable Solar Panel does not have a rigid external metal frame or reinforced plastic corners, relying instead on a heavy-duty, double-stitched 600D Oxford polyester fabric casing and metal grommets on the corners for structural protection and securing. Its rigidity is built directly into the laminate layers themselves, which feature a protective ETFE face and a stiff fiberglass/polymer backing board supporting the monocrystalline cells.
By vevor