How to Select an Off-Grid Solar Water Pump Controller for Irrigation
| ChinaSupplyChain
An off-grid solar water-pump controller must be matched to the entire pumping system. Buying by horsepower alone can produce poor performance or damage, especially in deep-well and agricultural installations.
Define head and target flow first
Total dynamic head includes vertical lift, pipe friction and delivery pressure. State the required flow at that head rather than listing the maximum head and maximum flow as simultaneous requirements.
Match motor and electrical input
Confirm motor type, rated power, voltage, current and phase. Then verify the proposed solar-array voltage range and whether AC backup is required. The controller input window must be compatible with both the motor and panel configuration.
Prioritize protection features
Useful protections include dry-run, over-current, short-circuit, under-voltage, over-voltage and high-temperature protection. An IP65 enclosure helps in outdoor environments, but shaded and weather-conscious installation remains important.
Share site data before ordering
Provide well depth, static and dynamic water levels, pipe length and diameter, daily water requirement, destination climate and available panel area. This lets the supplier recommend a complete configuration instead of a standalone box.
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