Solar water pumps
How to size a solar submersible pump by flow and head
Calculate daily water demand, flow and total head before requesting a solar pump for Mozambique.
When to use this reference
Use this reference for boreholes, livestock and irrigation where choosing by motor power alone can produce insufficient flow or unnecessary consumption. The goal is to separate confirmed project facts from commercial assumptions before comparing models or requesting a quotation.
Technical checks
Define daily volume, useful solar hours, dynamic water level, tank elevation, pipe losses, final pressure and margin, then compare the pump curve at that duty point. Record the source of every value and treat missing data as pending, never as a confirmed default.
- Measure static and dynamic borehole levels.
- Add elevation, pressure and friction losses.
- Convert daily demand into required flow.
- Check curve, diameter and motor cooling.
Record to share and review
Copy the fields below into a message or worksheet. Attach photos, a diagram and datasheets, then ask another person to review the data before purchase.
- Daily volume: ___.
- Levels/elevation: ___.
- Pipe/pressure: ___.
- Flow-head duty point: ___.
