SMA Communications

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HI

I  have 4 SMA inverters, 3 SWR2500U and 1 SWR1100U inverter and all have displays.  What is the best and most cost effective way to provide real time communications to a pc with these inverters.  I want to be able to monitor real time information and be able to store the information in chart or graph form.  Is powerline already built into each inverter?