continue on to further improve, to make sure product high quality in line with market and consumer standard requirements. Our firm has a excellent assurance program have already been established for 800w balcony solar system, Sungrow Inverter, Solar Inverter 5kw, Solis Inverter 3kw,15kw Solar System. We welcome shoppers, enterprise associations and buddies from all areas of your environment to speak to us and request cooperation for mutual gains. The product will supply to all over the world, such as Europe, America, Australia,Sweden, Oman,Guatemala, Montreal.We set a strict quality control system. We have return and exchange policy, and you can exchange within 7 days after receive the wigs if it is in new station and we service repairing free for our products. Please feel free to contact us for further information and we will offer you competitive price list then.