We recently had a 6.6KW system installed, (Longi panels and a Sungrow inverter), in NSW by Solar Tech Systems. Joe assisted in the decision making by being professional and very informative with an excellent knowledge of his products. Our property is quite isolated in the country and had a complicated layout, but the installation team arrived on time and did an excellent job. Joe was also very good at following up with the questions I had, both prior to the installation and with his after sales follow up. I highly recommend the team at Solar Tech Systems.