Solar Pumping System

Greenhouses like these in the Westland municipality of the Netherlands grow vegetables, fruits and flowers.

Agriculture and horticulture seek to optimize the capture of solar energy in order to optimize the productivity of plants. Techniques such as timed planting cycles, tailored row orientation, staggered heights between rows and the mixing of plant varieties can improve crop yields. While sunlight is generally considered a plentiful resource, the exceptions highlight the importance of solar energy to agriculture. During the short growing seasons of the Little Ice Age, French and English farmers employed fruit walls to maximize the collection of solar energy. These walls acted as thermal masses and accelerated ripening by keeping plants warm. Early fruit walls were built perpendicular to the ground and facing south, but over time, sloping walls were developed to make better use of sunlight. In 1699, Nicolas Fatio de Duillier even suggested using a tracking mechanism which could pivot to follow the Sun. Applications of solar energy in agriculture aside from growing crops include pumping water, drying crops, brooding chicks and drying chicken manure. More recently the technology has been embraced by vinters, who use the energy generated by solar panels to power grape presses.

Greenhouses convert solar light to heat, enabling year-round production and the growth (in enclosed environments) of specialty crops and other plants not naturally suited to the local climate. Primitive greenhouses were first used during Roman times to produce cucumbers year-round for the Roman emperor Tiberius. The first modern greenhouses were built in Europe in the 16th century to keep exotic plants brought back from explorations abroad. Greenhouses remain an important part of horticulture today, and plastic transparent materials have also been used to similar effect in polytunnels and row covers.

Features

  • High reliability and life expectancy with Low Maintenance.
  • Smaller size of solar / wind / battery systems making it cost-effective pumping solution.
  • Glass filled polycarbonate / Stainless Steel construction, industrial standard carbon-ceramic shaft seal.
  • Self-priming centrifugal design, protected against reverse polarity, overload and high temperature.
  • One controller for array direct or battery powered operation, with system status indication.
  • The soft-start controller optimizes motor efficiency under all conditions.
  • Dry run protection, mounted above ground (no submerged electronic parts).
  • Speed control, maximum pump speed adjustable to reduce flow rate to approximately 30 %.
  • Solar operation: MPPT (Maximum Power Point Tracking to increase efficiency by 40%).
  • Battery operation: low voltage disconnect and restart after battery has recovered.

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