Green Energy House

Green Energy House: Photovoltaics & Solar Thermal Energy in a practical way

DIY solar energy experiment kit for your classroom


The Green Energy House is a highly relevant concept. It brings together many issues relating to climate change and energy conversion and makes them clear and understandable for students from grade 5 onwards. The Green Energy House can be used in lessons from year 5 onwards.

The central components of the experiment set are three independent stations that can also be easily combined with one another. Your students can explore energy requirements, energy sources and energy conversion in a very practical way. The aspects of utilising solar energy are already intensively focused on during assembly. When the car starts moving, the lamp lights up and the water heats up, all students will realise what is possible with solar energy.

For each topic (mobility, solar thermal energy and solar power) there is experimental material for a separate station. A comprehensive handout can be purchased separately. It contains information on all three stations, tasks and experiments based on the curriculum as well as didactic and methodological information. 

Please note that the house pictured is not included. You can find further information and tips below. 

If you wold like to purchase the necessary material to equip a DIY Green Energy House please contact us at international@cornelsen-experimenta.de with the following article information.

  • Mobility - Fuel cell car: Art. No. 11510
  • Solar power - Sun follower: Art. No. 11520
  • Solar thermal energy - Hot water: Art. No. 11530
  • Handout: Art. No. 115005
  • 75 W Reflector lamp: Art. No. 47150 

Please note: If you purchase the entire DIY experiment set (all 3 stations) you only need one handout and one reflector lamp.

Mobility / fuel cell car

Die Garage mit dem Brennstoffzellen Modellauto wird gezeigt. Das Auto ist mit einem roten und schwarzen Kabel oben am Dach angeschlossen..}

Fuel cell car on the topic of mobility

This station is about electrolytic water splitting . The energy required for electrolysis is generated in via the solar cells. If the reaction then runs in reverse (the reaction products hydrogen and oxygen react again to form water) energy is released. This electrical energy is used to drive the motor - emission-free, of course.

The fuel cell car kit contains the car with fuel cell and all other experimental materials that are needed. All you need to add is distilled water.

Solar power / Sun follower

Die beweglichen Solarpanelle auf dem linken Schrägdach werden gezeigt. Es sind insgesamt 6 Solarzellen miteinander verbunden. Gesteuert und programmiert wird diese Modul mit dem Calliope mini.}

Photovoltaic module with sun follower for solar power

This station focuses on two aspects: the surface area of the solar cells (solar power) and the optimal angle of the sun's rays (sun follower) . The solar power is used for lamps and fans, for example. Additional consumers in the house can be added individually.

Light is usually only needed when the sun is not shining. How can this be regulated? Circuit, control and storage are being investigated from many sides. Among other things, the efficiency of using solar power is being measured and improvements are being discussed. This is where the sun follower can come into play. It aligns the solar modules towards the sun. This requires bright minds, sensors and a little programming.


Solar thermal energy / Hot water

Das Energiewandelhaus wird seitlich gezeigt und man kann in das untere Badezimmer schauen und kann so den Wärmetauscher erkennen, Hier führen die beiden Schläuche nach oben zum Dach und sind mit dem Sonnenkollektor verbunden. }

Solar module for hot water preparation

How can solar energy be used to provide hot water for heating and showers? Station 3 is all about solar thermal energy. Step by step, the students follow the principle of energy supply from solar heat. The sun heats the solar collector, which is filled with liquid. The heated liquid circulates through a heat exchanger. There, the water is heated, which is used for the heating system or the hot water supply . Here, too, measurements are taken, data is analysed and connections are being made by the students.

Solar collector, heat exchanger tank, pump and all connection and other necessary materials are included in the DIY experiment kit.

Further information and tips

For all stations, the experiments work excellently with "real" sunlight. However, the sun doesn`t always shine brightly at the planned time. We therefore recommend a 75 W reflector lamp. This power is sufficient to operate the solar cells and modules to be installed in the house.

Now unleash your creativity. Build a suitable house with your students into which you can integrate the stations. Alternatively, there are also suitable DIY dollhouses made of wood. We recommend dimensions of approx. 60 x 50 x 50 cm (W x H x D).

And now it's your turn! Build your own Green Energy House!

By the way, the Green Energy House has already inspired many schoolgirls in workshops at Girls'Day 2023 at the Federal Chancellery in Germany.