I purchased my 12.8 KW Residential Solar System from Solar-Tec Systems in 2017. I was able to cover my entire bill of $ 700 monthly which left me with only miscellaneous taxes from the SDG&E which combined over 1 year were less than $ 150 annually. I sold my house in 2021 to retire and as able to recoup the entire $ 40,000 I paid for the system. The investment was one of the best I’ve ever made and it also helped our Environment for Future Generation.