“A day without sunshine is like, you know, night.” — Steve Martin I personally prefer sunshine (though perhaps with less heat here in Singapore), because, since early August this year, we are the proud owners of a Solar or Photovoltaic (PV) System at our house. Fellow blogger Singvestor.com recently wrote a great post on energy savings (Hunting Vampires 18 Aug 2015 http://singvestor.com/hunting-some-vampires-in-my-house/), and then encouraged me to share my experiences with our Photovoltaic System. But before I dive into that, I would like to share some curious facts about the one and only in the center of our Solar System: 1) The sun’s diameter is about 109 times of Earth and weighs 330,000 times that of Earth’s mass.  It contains 99.86% of the mass in the solar system.  Sol is the closest thing to a perfect sphere that has been observed in nature. 2) If the sun vanished, we wouldn’t know ......