Pre-shipment inspection (PSI) is one of the many quality control tests conducted by Wenzhou Xihe Electric Co.,LTD.. This inspection is based on standard QC testing or on customer request. Based on these criteria and procedures, samples are randomly selected and defects are checked. For us, pre-shipment inspection is an important step in the quality control process and a way to check the quality of the 4000w inverters before shipment.

Fangpusun has been specialized in researching & developing, designing, and producing 4000w inverters for many years. Now we are generally considered as a pioneer in this industry. 4000w inverters is the main product of Fangpusun . It is diverse in variety. Through our quality assurance program, the product has achieved and maintained a high level of quality. It will automatically shut down to prevent the generated energy from harming people when there is a blackout. This product brings comfort at its best. It makes one's life easier and provides him or her with warmth in that space. It will automatically shut down to prevent the generated energy from harming people when there is a blackout.

With a practical approach to everything we do, Fangpusun concentrates our efforts and invest patiently to drive technological breakthroughs. Please contact.