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Solar Photovoltaic

Background

The first practical conversion of light into electrical energy was in 1954 using a silicon solar cell. It used the photo-electric effect first observed by Antoine Cesar Becquerel and his son Alexandre Edmond Becquerel in 1839: the emission of electrons from a surface (usually metallic) upon exposure to, and absorption of, electromagnetic radiation (such as visible light and ultraviolet radiation). This effect is the basis for a further conversion of the absorbed energy into electrical energy within a solar cell. There has been an enormous growth in solar photovoltaic installations in the last two decades and they will play an important role as one alternative to dwindling fossil-fuel energy resources.

Our Devices

Solar.Photovoltaic Aeroplane
Price: 64 €
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Aeroplane - Rotating Aeroplane driven by a Solar Modul

A little model airplane with a rotating propeller. The propeller is driven by an electric motor powered by two solar cells mounted on the airplane's wings. The airplane is supported by a counter-balanced rod pivoting on the tip of a vertical metal shaft (very low friction). The airflow produced by the rotating propeller drives the airplane around in a circle.
Solar.Photovoltaic LexsolarPVReadyToGo
Solar.Photovoltaic LexsolarPVReadyToGo
Solar.Photovoltaic LexsolarPVReadyToGo
Price: 699 €
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LexsolarPVReadyToGo - Photovoltaic Experimental Kit

This fully equipped experiment system can be used wherever you are without further components. This kit already includes all necessary ancillary equipment, like measuring equipment, and is delivered in an aluminum case with heavy-duty foam inserts. The scope of experiments ranges from simple trials that show the basic characteristics of the solar energy, to more challenging experiments dealing with topics like IV characteristics or temperature dependency of solar cells. Because of the large range of potential experiments, the product is also suitable for internal workshops in companies as well as a demonstration kit for sales representatives.

List of experiments

1. Solar energy + electric lessons

Series and parallel connection of solar cells
Power dependence on area of the solar cell
Power dependence on the angle of incidence
Power dependence on level of illumination
Power dependence ratio of energy conversion
Internal resistance of solar cells
Dark characteristic curve of solar cells
Inhibiting and conducting direction in illumination and darkness
IV characteristic and fill factor of the solar cell
IV characteristic of the solar cell in dependence on the level of illumination
Power dependence on temperature
Shading effect of solar cells in series connection
Shading effect of solar cells in parallel connection
The solar cell as transmission measure
Power dependence on the frequency of the incident light

Optics

Differences in brightness
Tilt of the solar cells
Diffused radiation
Direct radiation
Albedo radiation
Colour characteristics
Colour mixtures
Optical illusions (Benham disk)

List of components:

Solarmodul 0,5 V, 420 mA, QC
Solar panel 0.5 V, 840 mA
Base unit big
Lighting module
Diode-module
Resistor module
Potentiometer module
Gear motor module
Buzzer module
Light bulb module
Motor module without gear
Farbscheiben inkl. Halter - Set I
Solar cell cover set (4 pieces)
Colour filter
Universal - power supply
Hook weight 20g
Digital multimeter
Test lead black 25 cm
Test lead red 25 cm
Laboratory thermometer
Aluminiumkoffer leXsolar-PV Ready-to-go
Instruction-CD
Solar.Photovoltaic SolarPumpKit
Price: 30 €
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SolarPumpKit - Water Pump with Solar Module

Photovoltaic driven pumps are an interesting approach to providing water supplies in arid regions with high solar insolation. Our little Pump demonstrates the principles: The photovoltaic cell array drives a little electrical motor that is connected to a centrifugal pump fed with water from a reservoir. Don't expect thousands of litres to be pumped; but study of the system will convince students that it could be scaled up to practical full-size pumping systems. The kit includes a manual, all the parts and glue to assemble the device.
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