Q:Are you a inverter directly factory or inverter trading company?A:We are inverter manufacturer.Q: How does your factory do regarding quality control?A: Quality is the priority. We always attach great importance to quality controlling from the start to the end. All our products have gained CE, FCC, ROHS certification.Q:What can you do?A:1.AII of our products have proceeded aging test before shipment and we guarantee safety while using our products.2. OEM/ODM orders are warmly welcomed!Q:Warranty and return:A:1. Product wanrranty is 1 years 2. We own the best after-sale service team, if any problem happens, our team will do our best to solve it for you.Q:Is sample available and free?A:Sample is available, but the sample cost should be pay by you. The cost of sample will be refund after further order.Q:Do you accept customized order?A:Yes,We offer customization services to meet your unique requirements and preferenceQ:What's the delivery time?A:sample lead time is 1-3days, and Bulk order lead time around 1-2 weeksQ:What should be noticed when installing inverter?A:Put the product in a place where is well ventilate,cool, dry and water-proof. Pls do not stress and do not put foreign objects into the inverter.Rember to turn on the inverter before turn on the appliance.