Other 270 awnings, like the AluCab Shadow Awning ($1,500), avoid this by using clever fabric spreaders that dome the fabric to prevent pooling. The Ranger on a beach in Baja.

The MajorShady 270 is a freestanding 270-degree, roof-mounted awning. And, as far as awnings go, this one is pretty pricey at a retail of $949.