Rocksolar 3.75HP 60-450V Solar DC Brushless water transfer Pump
Pickup available at USA Fulfillment Center
Usually ready in 24 hours
Talk to Real Experts Anytime
Talk to Real Experts Anytime
Lifetime tech support from our in-house specialists
Hassle Free Warranty
Hassle Free Warranty
Effortless Warranty for Your Ease.
Unbeatable Value, Guaranteed
Unbeatable Value, Guaranteed
Find it cheaper elsewhere? We'll match it.
Speak To a Solar Specialist
Rocksolar 3.75HP 60-450V Solar DC Brushless water transfer Pump
solar industry experience
10,000+ American
customers
return policy
Warranty
What it is, and what it is for
ROCKSOLAR 3.75HP 60–450V Solar DC Brushless Water Transfer Pump (Pump Only)
What's included: Pump + controller, user manual, warranty card — panels and mounting hardware not included
Key specs:
- Motor: 3.75HP DC brushless | Rated power: 2,800W | Input: 60–450V DC (optimal: 300–380V)
- Max flow rate: 268 GPM (at minimum head) | Max head: 82 ft
- Inlet/outlet: 3" diameter
- Compatible solar array: 10 × 440W panels (4,400W, sold separately)
Built for: Large farms, commercial irrigation, large livestock operations, orchards, multi-acre crop watering, high-volume off-grid water transfer
Key features:
- 268 GPM max flow — highest in the entire DC transfer pump lineup, moves massive volumes in a short time
- 2,800W brushless motor with wide 60–450V input (optimal 300–380V) = designed for large 10-panel string configurations
- 3" commercial-grade inlet/outlet — handles high-volume throughput that would overwhelm smaller 1" or 2" pumps
- MPPT controller — auto-adjusts to available sunlight, stops and restarts without manual intervention
- Float switch / pressure switch compatible — automates fill and shutoff for large tanks and troughs
- Dry-run auto protection — shuts off if water supply is interrupted
- Proven in demanding ranch, orchard, and multi-acre crop irrigation — customer-confirmed reliable performance across long watering days
1 component
Each one is a product we sell on its own, so you can read its full listing, and replace or add to it later.
Published before you buy. No email required.
Every number, by component.
The figures the manufacturer publishes. The datasheet above is the reference if the two ever differ.
| Pump Specification | Details |
|---|---|
| Product | ROCKSOLAR 2800W Solar Brushless Transfer Water Pump |
| Motor Type | High-Efficiency Brushless DC Motor (BLDC) |
| Controller | External with Maximum Power Point Tracking (MPPT) Technology |
| Power | 2800W |
| Voltage Range | 60-450V DC |
| Max Head | 82 feet |
| Max Flow Rate | 268 GPM |
| Pump Diameter | 2 inches |
| Pump Outlet | 2 inches |
| Protections | Dry Run, Overload, Overvoltage, Low Voltage |
| Ingress Protection | IP54 Rated (Pump), IP65 Rated (Controller) |
| System Installation Distance | Controller to Motor: Up to 80 meters |
| Warranty | 5 Years |
Before you order.
If yours isn't here, ask an engineer. It costs nothing and it's the step most people skip.
Submersible or transfer pump — which do I need?
A submersible pump goes down the well or into the cistern and pushes water up from below; it is the right choice for any well and for deep tanks. A transfer pump sits beside a pond, creek or tank, lifts water a short height and then pushes it along; it suits surface water and moving water between tanks.
Does it run on cloudy days, or at night?
A DC brushless pump slows down when the light drops and stops when there isn't enough, then restarts on its own when the sun returns. It does not run at night. The usual answer is a storage tank, filled by day and drawn on around the clock. If you need pumping after dark, add a battery, or choose a hybrid AC/DC pump that falls back to the grid or a generator — but only if you actually need that backup, because it costs more and most sites don't.
Do I need a battery?
No. Solar-direct pumping into a tank is the standard design and the cheapest one: the tank is the battery. A battery is worth adding only where water has to move at night or on demand, such as a pressurised house supply with no tank.
What is in a kit that isn't in the pump alone?
A kit adds the solar panels sized for the pump, the PV cable and the combiner box with its breaker and surge protection, so it is ready to wire up. The pump-only listing is for people who already have panels or a battery system to run it from.
How do I know which model to choose?
Two numbers decide it: how far the water has to be lifted, including pressure and pipe friction (the total dynamic head), and how many gallons a day you need. The finder works both out from your well and your use, and picks the model with the right curve. If you are unsure of your well depth or static level, ask us before you order.
Will it stop when the tank is full, or the well runs low?
Yes on both. The controller takes a float switch or pressure switch, so the pump stops when the tank is full and restarts as it drops, and it has dry-run protection that shuts the pump off if the water level in the well falls below the intake.
What if I'm not sure this is the right product?
Ask before you order. Send us what you need to run, or your pool or well figures, and an engineer will confirm the choice — it costs nothing. Or use the finder below, which sizes from what you actually run and shows its reasoning.
