Hello,
the Power One Aurora Powerinverter is connected via RS485 on /dev/ttyUSB0.
WIth th following programm it is possible to connect and get date from the power inverter.
http://www.curtronics.com/Solar/AuroraData.htm
Maybe it is possible to integrate this easy in openhab because the source code from the site could be used.
thanks
Kr
Michael