Hello,

I am going to buy a premium license, but before that i want to be confident about bellow isues : Is there any difference between simulation and reports in evaluation mode VS licensed software ? I simulated our real project which has two strings, one with mono and one with poly 250W Yingli modules. But at the reports, production of two systems was the same. In real, mono string is producing 7% more energy. So what could be the reason ? Do we need to use paid weather data (Location : Iran) whereas Meteonorm 7.1 is available until 2000 only for a few sites ?

Please help

I didn't find the right solution from the Internet.

References:
http://forum.pvsyst.com/viewtopic.php?t=3249
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Thank you