- Home
- Free Tools
- Solar Water Pump Calculator
Free tool
Solar water pump sizing calculator for farms
Size a solar pump and array from well depth, daily water need and sun hours.
Recommended solar array
2.8 kW
Recommended solar array
2.8 kW
2.31 kW pump lifting 40 m³/day from 70 m
- Hydraulic energy needed
- 7.63 kWh/day
- Electrical energy needed
- 13.87 kWh/day
- Pump power rating
- 2.31 kW (3.1 hp)
- Average flow rate
- 111 litres/min
- Land irrigated (vegetables)
- ≈ 0.9 hectares
- Diesel avoided per season
- 971 litres
Sizing uses standard hydraulic power formula with array oversizing for morning and evening low irradiance. Real well yield must be confirmed on site.
Questions about this calculator
More free solar tools
Solar System Size Calculator
Enter your monthly usage and get the full system design — kW, panels, inverter and battery.
Open →Solar Panel Calculator
Panel count and roof area for any monthly electricity usage.
Open →Inverter Size Calculator
Correct hybrid inverter rating with surge headroom for your load.
Open →Battery Bank Calculator
Lithium vs lead-acid capacity sized for your backup hours.
Open →Cable Size & Voltage Drop
DC wire thickness, voltage drop percentage and breaker rating.
Open →Tilt Angle & Direction
Best fixed tilt and orientation for your latitude.
Open →Solar Payback & ROI Calculator
See how many years your solar system takes to pay for itself and what it earns over 25 years.
Open →Generator vs Solar Cost Calculator
Compare five-year running cost of your generator against an equivalent solar system.
Open →Appliance Load Calculator
Add up your appliances to get daily kWh, peak watts and the inverter you need.
Open →Roof Area to Solar Calculator
Turn roof length and width into panel count, kW capacity and yearly production.
Open →String Sizing Calculator
Temperature-corrected panels per string for safe inverter voltage limits.
Open →Ready to switch off the generator for good?
Book a free site survey in Ghazni. We measure your load, design the right system and give you a fixed written price.