500W 3HRI Solar DC Borehole Pump
R6,120.00
The 3HRI Solar Borehole Pump kit includes the pump and matching DC controller, built for off-grid or hybrid solar water pumping. Constructed from 201 stainless steel, this 500W (48V DC) kit delivers heads of up to 120m and a flow of up to 1.75 m³/h.
Material:
- 201 Stainless Steel Pump Body & Casing
- 100% Copper windings
- Stainless Steel Shaft & Coupling
- Wear-resistant rubber stator
- Graphite bearings
Features:
- Compact structure with high efficiency, low noise, and pollutant-free
- DC Brushless Motor with matching DC controller included in the kit
- Soft-start electrical control provides protection against under-voltage, over-voltage, over-pumping, overloading, and waterless (dry-run) automatic recovery
- Easy installation, maintenance-free, safe and reliable
- Power: 500W | Voltage: 48V DC | Max Head: 120m | Max Flow: 1.75 m³/h
Application:
Suitable for installations in boreholes, wells, rivers, dams and tanks with a minimum internal diameter of Ø80mm (3").
Working Conditions:
Non-corrosive water with sand content not exceeding 1% by volume, particle size not exceeding 0.5mm. Max pumped liquid temperature 40°C. pH range 6.5–8.5.
Performance Table:
| Flow (l/min) | Head (m) |
|---|---|
| 0 | 120 |
| 4.16 | 110 |
| 8.3 | 105 |
| 12.5 | 90 |
| 16.6 | 75 |
| 20.8 | 60 |
| 25 | 30 |
| 29.16 | 0 |
How Many Solar Panels Do You Need?
This 500W kit needs a solar panel array of about 800W to run reliably — for example, 2 standard 400W solar panels wired together (fewer, larger panels or more, smaller panels also work, as long as the total wattage adds up). This is more than the pump’s own 500W rating on purpose: it covers cloudy days, cable and controller losses, and less-than-perfect sun angles, so your pump still gets full power when it matters. Panel count is a general guideline — your installer or our team can confirm the exact setup for your site, panel brand and location.
Which Solar Borehole Pump Is Right For You?
Choosing the right pump comes down to your borehole’s water level (the depth to the water itself, not the total borehole depth) — not just the size of the motor. A pump that’s too small for your water level won’t lift enough water, while an oversized pump costs more than you need. As a simple rule of thumb, choose a model rated for at least 25–30% more head than your actual water level, to allow for pipe friction losses and any future drop in the water table.
| Model | Motor Power | Material | Recommended for water levels up to |
|---|---|---|---|
| 3HRI210-80 / 3HR210-80 | 210W | 201SS / 304SS | ~60m |
| 3HRI300-100 / 3HR300-100 | 300W | 201SS / 304SS | ~75m |
| 3HRI500-120 / 3HR500-120 | 500W | 201SS / 304SS | ~90m |
| 3HR750-140 | 750W | 304SS | ~105m |
| 3HR1200-180 | 1200W | 304SS | ~135m |
The 3HRI range (201 stainless steel) is our most affordable option, ideal for clean, neutral borehole water (pH 6.5–8.5). The 3HR range (304 stainless steel) is more corrosion-resistant and better suited to acidic, saline or harder water, and also extends to deeper 140m and 180m options. Not sure of your borehole’s water level, or which range suits your water quality? Contact us before ordering — we’re happy to help you pick the right pump so you don’t end up with the wrong one.