PVSOL.V3.0.7 光伏系统仿真 
PV*SOL gridcon is a programme for the design and simulation of grid connected photovoltaic systems. With PV*SOL gridcon, the most commonly-used system configurations can be optimised for efficient system design. 
This dynamic simulation programme has been developed for engineers, planners, roofing specialists and electrical engineering or building technicians. 
You can create your system using a wide range of modules and the programme helps you to determine the size of the system with the roof layout facility. After testing all the relevant physical parameters, the programme shows you the right inverter and PV array configuration.. 
More info 
http://www.valentin.de/index_en_page=photovol