Can solar energy be used everywhere

It can be used everywhere but only during the day

http://www.dasolar.com/images/pages/solar-energy-solar-energy-for-kids3.jpg

http://www.educapoles.org/multimedia/animation_detail/the_sun_a_form_of_energy_available_everywher
e/

http://upload.wikimedia.org/wikipedia/commons/4/45/Giant_photovoltaic_array.jpg