Forty Schüco 210-watt modules were installed on Schüco ezRails, which were attached to the standing seam roof’s metal pans using nonpenetrating S-5! clamps. The air gap provided by the racking system helps air flow between the modules and metal roof, keeping the modules cooler and improving the system’s overall efficiency. The four strings of 10 modules are wired to two Fronius 4,000 W inverters (20 modules per inverter), which are located next to the main service panel in the basement. In the first three months of operation, the system has produced 3,615 kWh, slightly exceeding PVWatts’ estimate of 3,430 kWh.