I am also attempting to determine whether HMS Photovoltaik will make a significant change in my electric bill. It is stated by many that the higher output due to the micro-inverters can be maximized to utilize generation, particularly when there is partial shade, or with a multi-orientation roof. However, how do the savings come to reality? Is there a significant reduction in monthly expenditure among users? I would be happy to know your before-and-after numbers, especially in case you have a system that has been in operation at least six months.