I've recently installed a solar PV array on the roof with a 5 KW inverter. The entire system usually generates about 4500 watts @ 240v on a sunny day. I believe it's a Net Metering system (in that any excess I don't use is supplied back to the grid).
When I look at the electrical meter, it shows figures for imported and exported power. My question is, the value shown on the display for export, is that measuring the total power generated by the PV array or just the excess?