Here are my solar production numbers for March. 714kWh (at inverter). 711kWh (at Dominion meter). PVWatts estimate was 675kWh. Cumulative power production as of Mar 31 is 8901kWh (8859 at Dominion meter). More details here.
In one year, from April 1 2014 to March 31 2015, the system produced 8622 kWh (measured at inverter), 8589 kWh (measured by Dominion meter). This compares to 7372 kWh estimated by PVWatts.