Choose your mode: Basic for a quick estimate using total lift, or Advanced for a full TDH engineering calculation.
Total gallons your crops or livestock need per day
gallons/day
Height from water source to discharge point
feet
Average daily peak sun hours (e.g., 5.5 for Texas, 6.5 for California)
hours/day
DC = direct solar, AC+VFD = most common for farms
Depth from ground surface to static water level
feet
Water level drop in well during pumping
feet
Height above ground where water is delivered
feet
Pipe friction (typically 10-20% of static head)
feet
For drip/sprinkler systems (1 PSI = 2.31 feet of head)
PSI
Gallons per minute your irrigation system needs
GPM
Average daily peak sun hours
hours/day
Pump + motor + controller combined efficiency
Sizing Results
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Total Dynamic Head (TDH)
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Required Pump Power
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Solar Array Size
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Daily Water Output
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Flow Rate
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Hydraulic Power
Recommended System
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Formulas used: TDH = Static Head + Drawdown + Discharge Elevation + Friction Loss + (Pressure x 2.31) Hydraulic HP = (Flow Rate [GPM] x TDH [ft]) / 3960 Brake HP = Hydraulic HP / System Efficiency Solar Array [kW] = Brake HP x 1.5 (sizing margin) Daily Output = Flow Rate x Sun Hours x 60