Just got a solar system installed in December. It is a small system - 2.2 kW (CAC) and has been generating between 10 - 12 kWh per day since then. I officially went "Live" last week with my utility company installing the Net Metering device.
So far, happy to be generating.
Since I went with enPhase micro-inverters, I can monitor my system. I know they charge, and I'm not sure I want to pony up. Here's what the enPhase website looks like for my system:
I'm currently generating between 11 and 13 kWh per day.
Out of curiosity, I looked up the enPhase [url="http://www.enphaseenergy.com/products/products/envoy.cfm"]micro-inverter communication gateway device[/url] that is the bridge between the panels and the website. I then ran nmap against it and found it runs Linux with a small web server. It has ports 80 and 22 open. I have yet to figure out the root password to the console, but the web interface is easy to get at. I just opened my firewall on my router to port 8042 (which may change) and I now have instant access. I'm thinking I could write a simple script to capture this data and generate the same types of reports the that website has. Maybe not with the cool graphics.