Wouldn't it be nice if there was a beautiful, elegant tree in the heart of your city which would allow you to charge your cell-phone, mp3 player or digital camera, one which could function as a street-light at night and could also generate solar energy? Well this is what Solar trees are all about.

Here is a list of some striking Solar tree sculptures:
SonUmbra by Loop.pH is an interactive solar-powered tree which was unveiled at the London design festival. Its branches are composed of light-emitting strands which light up in the dark. The SonUmbra is powered by a PV-equipped canopy which harnesses sunlight during daytime and stores it to light up the tree at night. A unique feature of the tree is that it greets a visitor with an interplay of light and sound, encouraging interaction.
Solarflora, designed by California-based Darren Saravis, the founder of Nectar design is a solar-powered tree intended for use at public places like parks, museums, bus-stops, fairgrounds and others. Solarflora, sculptured in the form of a flowering plant can hold upto 4 solar panels and can supply 750 Watt-hours of electric energy in a day.
This wonderful concept from Neville Mars consists of trees with photovoltaic leaves to harness solar energy. The trunk of the trees consists of power outlets, which are used to charge electric vehicles. The photovoltaic leaves also provide shade to the cars.
Designed by Oscar G. Torres, the Helios Power tree features thin solar cells as leaves which are connected via a network that runs through the branches and trunk to a large battery installed at the base of the tree. There is a USB hub installed at the base which allows you to charge your gadgets using the solar energy.
Designed in the shape of a tiny bonsai-tree by Paris-based designer Vivien Mueller, the photosynthesis solar tree features upto 54 mini-photovoltaic cells which absorb the sun's energy. This energy is stored into a battery which you can use to charge your gadgets. The tree consists of several rotating modules which can be arranged to obtain different shapes.
The mallee-tree shaped solar trees were built as a part of Adelaide's Green-city program.The solar trees are equipped with solar panels on top which provide lighting around the area. Each tree produces 864 kWatt-hour of energy per year used for night lighting, while the excess power is returned to the electricity grid.
The Solar Sunflowers in Texas are set up by an art team called Harries/Heder. The flower-like photovoltaic panels absorb the sun's energy to produce renewable energy used to power the installation's blue LED lights at night. The Solar sunflowers also provide shade to the pedestrians.