The Armenian-American Wellness (mammography) Center (AAWC) in city of Yerevan situated in the latitude 40011 (N) and longitude 44024 (E) at approximately 900m above see level. Armenia is a highland and has continental climate with hot dry summer and average annual global irradiance of about 1700kWh/m2 [1].

The PV roof of the building is south-east oriented and inclined at 280 to the horizontal plane. The 10kW PV array consists of 144 modules divided into 9 groups with 16 serial connected modules in each group. The module is made of silicon Uni-Solar laminate on the 0,7mm thick stainless steel sheet with 332cm length and 45cm width. Each module has rated power 68W, voltage (Vmp)

16,5V, current (Imp) 4,1A, open circuit voltage 23,1V, short circuit current 5,1A, and weight 12kg. The PV roof has 220m2 total area including 124m2 of photosensitive area (Fig.1). The rated power output of PV array is 9,8kW.

The PV array is connected through three grid-tied FRONIUS IG 30 inverters and reversible electric meter (with remote data acquisition) to the 3-phase national grid. Each inverter has three inputs with voltage range of 150-400V and one output of 230V, 50Hz. PV modules in upper horizontal row may have higher temperature than modules in lower row and their temperature dependent output values may differ. Therefore, inverter’s inputs are connected to the vertical columns of PV module groups to ensure similar phase power supply (Fig.2). The PV station has solar radiation,

PV module and ambient air temperature sensors for monitoring.

As a grid-connected PV power station it is the first one in CIS countries. According to local regulations any grid connected power plant should receive a license from the Public Services Regulatory Commission. The PV station has been completed and tested with the grid a few months ago but due to numerous bureaucratic obstacles it is still not commissioned and no monitoring data are available at the moment. PV station’s commissioning is expected in one-two months.