This system is different, it consists of an array of 12.2 kW of Uni-Solar PVI-136 thin film modules.  The school is of wood construction and a structual evaluation determined that the roof could support only adding 1.0 PSF of modules of a type that would not retain any more snow than normal.  Fronius Symo 12.0-3 208-240 inverter, Draker data system.