I was wondering if you have done any testing of the Fronius IG5100? I was particularly curious about what you mentioned in a previous thread about the IG inverters operating in 3 efficiency ranges depending on the input voltage. Does that hold true with this model? (The CEC has the IG5100 rated at 94.5%, which is inline with your previous tests.)

I have an installed IG5100 (and datalogger) connected to 30 SAPC-175 panels that I am very happy with, (the system has been in for almost 7 months) like I said I'm just curious...

A few pics of my array:
http://www.morayreef.com/solar/solar_edge.jpg
http://www.morayreef.com/solar/solar_rear_side.jpg
http://www.morayreef.com/solar/sm_front.jpg