The 3DSS‑A/D and 3DSC‑A/D(HV) series are 3″ AC/DC dual‑use brushless solar pumps, featuring stainless steel screw impellers (3DSS) or stainless steel centrifugal impellers (3DSC), with NSK bearings and stainless steel oil cylinders for durability. They are equipped with an AC/DC auto‑switching controller (≤2.2kW) that accepts ultra‑wide input voltage: AC 85V–280V and DC 100V–450V, making them compatible with PV, grid, or hybrid power sources. The 3DSS series delivers 2 m³/h flow with max head up to 150 m; the 3DSC series offers 4.8–6 m³/h flow with max head up to 135 m. Outlets range from 0.75″ to 1.25″, with a 2 m cable and free spare parts included. Ideal for deep‑well lifting, high‑head water transfer, and off‑grid water supply.