SunPulse Water        

Solar Water Pump

The SunPulse Water is a world-leading low-temperature Stirling engine water pump for decentralized water supply and distribution. The SunPulse Water can pump water from a depth of up to 100 meters. It is particularly simple to construct and can therefore be produced locally.

The SunPulse Water in the Solar Testfield of Tamera, Portugal

Decentralized water supply and distribution are amongst the most important tasks to be solved today in the threshold countries and developing countries of the South. The SunPulse Water is the model from Sunvention’s groundbreaking low-temperature Stirling engine range which has been specifically designed for this purpose. It is particularly simple to construct and can therefore be produced locally, supporting the regional economy, and ensuring that the knowledge and skills needed to use, maintain and develop the system are locally present.

The SunPulse costs are half those of current photovoltaic pumps. Comparison to diesel pumps is even more favorable.


The SunPulse Water is optimized for stand-alone water pumping, from a depth of up to 100m, or for pumping water up to higher ground. It can also be put into service as the prime mover in a variety of other applications, such as:

  • Driving grain mills, power saws, presses etc.
  • Driving air compressors to store compressed air to be used for pneumatic tools, for water oxygenation, etc.
  • Driving a generator to produce electricity.
  • Driving an oxygen concentrator to selectively filter oxygen from atmospheric air. The concentrated oxygen is easy to store at close to atmospheric pressure. This is an enabling technology which gives easy access to high-energy density, high-temperature combustion processes (see inventions of Horst Wagner). Typical applications:
    • Process heat for ceramics, metallurgy.
    • Clean low-emission combustion of all kinds of biomass
    • Low-emission stoves and ovens
Technical Details
  • Working Fluid: Air.
  • Internal Pressure: Close to atmospheric pressure.
  • Cylinder: Diameter 2 m, height 50 cm.
  • Temperature of hot side: Over 100ºC
  • Cooling: Cooled by the pumped water.
  • Tracking: Single axis tracking system.
  • Pumping Capacity: In a country with 2000 sunshine hours per year,
    • approximately 400 thousand liters per day for irrigation, or
    • approximately 80 thousand liters per day at a pumping depth of 10 meters, or
    • approximately 25 thousand liters per day at a pumping depth of 30 meters, or
    • approximately 15 thousand liters per day at a pumping depth of 50 meters.
  • Estimated Working Lifetime: Approximately 30 years.
  • Cost over ten years of operation: 3.5 Euro-cents per cubic meter of water pumped from 30 meters depth.
  • Tested in over 1000 hours of operation.

SunPulse Water in front of the Energy Power Greenhouse, SunPulse Electric and Hot Oil Storage

Sunvention International GmbH · Industriestraße 8 · D-79541 Lörrach Haagen · Germany
Tel.: +49-7621-95675-19 · Fax: +49-7621-95675-29 ·