I put in it about 6 ft higher than the attic flooring joists. My attic isn't really floored. The very best point in my attic is about 12 feet higher than the attic joists. Previously, solar panels them selves account for less than 50 % the expense of big solar https://mariodfxla.blogsvirals.com/34000558/getting-my-solar-company-in-sriganganagar-to-work