Drilled shaft piles for solar array footings can vary anywhere from 6 to 24 inches in diameter and 5 to 30 feetdeep,depending on site conditions and other variables. The drilled shaft or borehole is filled with high-strength cement grout or concrete.
Building a weatherproof DIY solar generator involves mounting and wiring a battery, charge controller, inverter, trickle charger, and fusing inside a weatherproof case.