Grundfos's SQFlex is the renewable-energy submersible pump range with one of the widest input windows on the market: 30–300 VDC or single-phase 90–240 VAC on one universal, non-polarity-specific connection, running from solar, wind, generator or battery power. Two hydraulics cover the duties — helical rotor (3″) for high heads and small flows, centrifugal (3″ and 4″) for larger flows — up to 250 m of head or 18 m³/h, with all-stainless construction (AISI 304 standard, AISI 316 on -N variants).

The MSF 3 permanent-magnet motor integrates the electronics: MPPT, dry-running, over/under-voltage, overload and over-temperature protection are built into the pump itself, with no limit on starts and stops. The CU 202 control unit and IO switch boxes complete the system, with head/flow performance published as curves in Grundfos's data booklet (attached). CE marked.