First 5 to 6 years since the very beginning the panels the workmanship have all been upsetting enough to make me angry. When I called them and told them they under estimated the panels i.e. there werent enough. thats when all the trouble started and to this day I have begged them to take them off and they keep refusing. I turned them off a year ago and they still send me bills help. my SMUD bill alone is equal to the Tesla solar bill. HELP