Chris, finally got an origin electricity bill for a full 90 days. During this peroid the sunshine was not always perfect, as you know but my account is $508 dollars in credit! I am amazed how good the 6kw German system has performed. I can not wait for the next 90 day period, as I think it will perform even better, as the days get a little longer. Thanks for supplying and advising us on our system. Cheers Ron P