This is not your normal instalation of photovoltaic panels. In a normal install, on a concrete tile roof, the photovoltaic panels are install on top of the concrete tiles. The contractor walks all over your fragile concrete tiles and cuts holes in you tiles to install the mounting hardware.
The photo above is an examle of the traditional method of installing a PV panel mounting system on a concert tile roof. Select tiles are removed, a bracket is mounted to the rood sheeting, a riser post is attached to the mounting bracket, a standard sheet metal roof flashing is placed over the post and the top edge is sealed. This whole process is tough on the existing roof, as you are walking all over the tiles, and prone to leak due to the numbers location of the mounting post. This type of install also used a rail that the panels are mounted to.
Our installation requires the concrete tile too be removed. The a New 40 year asphalt shingle is laid down, a metal flashing is placed on the roof and the SunPower smart mounts are attached to the roof. Pre-installed on the botom of the mount is a sealing compound the is squeezed out the the bolts are tightened. Talking about bolts there are eight. No rise post or rails are used. the panels attach directly to the SunPower Smart mount.
Next the electronics.