ZIRI Solar Bilge Pump QDX8-18-1.1DC 1100W 18m³/h 26m

Product description

The ZIRI QDX8-18-1.1DC Solar Drainage Pump is a 1100 W direct current submersible designed to evacuate or transfer water using photovoltaic energy in off-grid locations. It offers up to 18 m³/h flow rate and a maximum head of 26 m, covering a wide range of situations where additional elevation is required compared to high-flow but low-head models. It operates in an electrical window of 110–150 VDC supervised by an external MPPT controller (not included), which stabilizes operation under irradiance variations and protects the equipment.

Main features

• Balanced hydraulic curve: maximum flow rate of 18 m³/h with head up to 26 m.
• Operating range in DC: 110–150 VDC with MPPT control for optimal performance.
• High efficiency in draining tanks, channels, and shallow wells, with discharge of 2”.
• Submersible design for clean or slightly loaded water, reliable in continuous operation.
• Safe electrical management: the external MPPT keeps the voltage within range and prevents string overvoltage (Voc).

Advantages or benefits

• Greater useful head compared to drainage pumps designed only for flow, allowing to overcome elevation differences and long pipelines.
• Minimal energy cost when operating with photovoltaics, without generators or grid connections.
• Simple installation with standard 2” hoses and common drainage accessories.
• Low maintenance when used with clean or slightly loaded water and proper filtration.
• Reliability and service continuity thanks to MPPT control and robust submersible design.

Purpose or applications

Evacuation of inspection wells and pumping chambers, drainage in basements, transfer between tanks, drainage of ponds and lagoons, gravity-fed irrigation supply, and auxiliary operations in farms, light civil works, and agricultural operations. Suitable when it is necessary to combine a significant flow rate with greater head.

Technical specifications

Compatibilities

Direct compatibility: photovoltaic generators whose operating point remains between 110 and 150 VDC, managed by an external MPPT controller according to the power and current of the array.

Compatible accessories: 2” hoses, check valve, suction strainer/basket, level switch (float), DC protection cabinet (circuit breaker and SPD), solar cable sized for distance and current, fastening and suspension elements.

The ZIRI QDX8-18-1.1DC offers the perfect combination of head and flow rate for demanding solar dewatering operations, providing speed, efficiency, and reliability with a properly sized and controlled photovoltaic installation.