Writer: Frances K. Ng

Solar energy trees (or solar trees) are among the latest innovations in solar technology. A solar tree, despite its name, is a solar energy generator that resembles the appearance of a tree whose ‘leaves’ are solar panels supported by tall poles (the ‘trunk’ and ‘branches’).  But what is so special about this type of solar energy generator?

The solar tree design boasts of several unique advantages: It occupies relatively little space, so where there is space constraint (as in densely populated areas), multiple layers of solar panels can be built on the same tree without taking up extra horizontal space. This maximises the efficiency of the tree over a limited surface area. It is also a suitable alternative for buildings whose structure does not permit the installation of rooftop solar panels. 
The tree-like appearance of a solar tree enables a variety of designs that easily attract public attention, making it an ideal tool for publicity or education—companies could attach their logos on the trees to show their support for sustainability. Furthermore, the solar tree can include other functions e.g. automatic sun-tracking and built-in cleaning mechanisms.

Here are some interesting examples of creative solar tree designs:

1.    The solar energy palm trees in Dubai created by Smart Palm act as Wi-Fi hotspots and charging stations for mobile devices. It also provides shade, seating and night-time illumination by using its stored solar energy to power light-emitting LEDs (light-emitting diodes). 

(Image source: Designboom) 

2.    The solar energy tree designed by Ross Lovegrove and manufactured by Artemide utilises Artificial Intelligence to control its energy and light. It serves as a sustainable street lighting solution and provides seating to passers-by.

(Image source: Designrulz) 

3.    The gigantic Supertrees designed by Grant Associates for Singapore’s largest garden project collect rainwater and act as venting ducts for conservatories.

 
(Image source: CNN) 

With the continual advancement of solar technology and design innovation, the future is bright for solar trees as a potential standard source of renewable power supply.

Sources:
1.    https://www.solarreviews.com/blog/solar-tree-your-guide-to-this-fast-growing-solar-trend
2.    https://www.designrulz.com/solar-energy-trees/
3.    http://www.rosslovegrove.com/custom_type/solar-tree/