PV Array Sizing Tool for Solar Water Pumps

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Step 1 — Where will it be used?

Region sets the panel-to-pump power ratio

Solar pump specs

PUMP / CONTROLLER

Pump rated power Nameplate

MPPT window (lower) upper (optional)

If the nameplate lists a single voltage, leave the upper bound empty (array Vmp ≥ lower). With a range, array Vmp must fall inside it.

Max open-circuit voltage

Solar panel specs

PV PANEL · SINGLE

Panel Pmax

Panel Vmp

Panel Voc

Wiring preference

1Power: array total ≥ pump power × 1.5
2Voltage: array Vmp must sit inside the pump MPPT window
3Open circuit: array Voc ≤ pump max Voc, otherwise the controller is damaged
4Series raises voltage; parallel raises current, not voltage

Enter pump and panel specs

The calculator checks every series and parallel combination against power, Vmp and Voc, then recommends a wiring layout. Fill in the six fields and press Calculate.