I generated more electricity with my sunpower.com panels in April than I did in June.
I am not sure why. I think we must have had more cloudy days in June than in April. I was expecting more in June than April because the sun is up longer and is more directly overhead. It is also possible that the panels are getting dirty from the dust storms.
May does not help much because the system went offline on May 18 and did not come back on until part way through June 1. I look forward to the promised email notification system they have promised will come.