In accordance with China's newly established national standards, the AC socket type must be upgraded to a five-hole socket (with details outlined below). The Chinese plug-in versions of the MEAN WELL NTS/NTU series inverters require modification in line with these new national standards; however, this alteration will not compromise the original characteristics of the inverters. Shipments of the new version will commence from December 2023, and during this period, there will be a transitional phase allowing for the shipment of both old and new versions, with the selling price remaining unchanged. Should you have any inquiries regarding this product change, please reach out to a MEAN WELL sales representative.