Jeff, first just don't engage, I get what you are trying to say and so do most of the others I suspect.If I understand your question...
The rate of charge has nothing to do with our solar panels. The only difference is the cost of electricity.
second, how big is your array? Do you use any kind of powerwall or batteries for storage? Typically how long does it take you to charge with your array as compared to using utility electricity? Are you grid tied or stand alone?