Description
The SR-7 is a narrow-casing, multi-stage centrifugal submersible built for high daily volume in shallow to moderate lifts—and for sites where hard or caustic water makes rubber rotors a poor fit.
Unlike helical-rotor pumps, the SR-7’s stacked impellers move large amounts of water at low electrical input, letting modest PV arrays fill stock tanks and storage quickly.
With stainless construction, a slim submersible form, and a matched SunRotor controller, it starts early, runs late, and stays serviceable for years in remote applications.
Product Details
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High daily gallons: Multi-stage centrifugal design pushes strong flow on shallow to mid lifts; excellent for tanks and troughs.
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Hard-water friendly: Impeller chamber is silt and caustic resistant, avoiding the rotor wear common with rubber stators.
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Flexible power: Works solar-direct, battery, or hybrid with the SunRotor DC controller; easy to right-size arrays.
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Field serviceable: Designed to be readily repairable; a single pump can be rebuilt instead of replaced.
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Installer-ready: Slim submersible body for tight casings, integrated check valve, and a standard 1" FNPT outlet.
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Consistent runtime: Early start/late run behavior with the controller’s boost maintains output through changing irradiance.
Technical Specifications
| Category | Specification |
|---|---|
| Pump type | Multi-stage centrifugal submersible |
| Nominal motor voltage | 36 VDC |
| Usable voltage range | 24–36 VDC (with matched controller) |
| Recommended power | ~310–800 W PV (array dependent) |
| Maximum functional lift (TDH) | ≈150 ft (46 m) |
| Example flow @ 100 ft | ≈12.3 GPM with ~800 W PV input |
| Outlet connection | 1" FNPT |
| Submersion guideline | Up to ~100 ft below static water level |
| Construction | Stainless body; centrifugal chamber silt/caustic resistant |
| Serviceability | Readily repairable in the field |
| Typical applications | Livestock tanks, troughs, storage transfer, cabin supply on shallow/mid lifts |
Specs & Info