Our ground mounts utilize galvanized steel posts which are set in concrete a minimum of four feet in the earth. Solar modules are long term, no maintenance by design so we want our mounting structure to be as well.

We are seeing some companies utilizing precast cement block to hold their solar structures.  This is a way around having a backhoe for installation and its cost.  However, any foundation built correctly, needs to be placed below the frost zone so it stays in one place.

Looking at a number of these precast units after one winter shows movement of one portion of the solar array one way and the next another direction. Frost heaving through the year has moved the entire precast block.  What will this look like after 10 years.  Not very good in our view.

We do not believe this is a place to skimp and have our own excavating equipment to keep the cost down as low as possible.