How many square miles of solar panels are necessary to power the entire country?

What’s Earth day mean to you, is it really necessary?

My dad says all this earth day stuff s pointless, we are making a big deal over global warming and stuff but its a natural occurrence and that the earth goes through this cycle every thousands of years. I don’t know if its true but I love and trust him even though he’s not my [...]

Is it necessary that our future generations have solar power in the home?

hi yahoo answers give me the basic guidelines about the solar power in the home..

what are the necessary resources you need to make windmills work?

Global Energy Transformation: Four Necessary Steps to Make Clean Energy the Next Success Story

Product DescriptionOver the next few years, political and financial power will move in the direction of individuals, companies and nations that are able to use energy in a more efficient way. This book describes this challenge and presents a way forward by which we may achieve the goal of increased energy efficiency in the different [...]

Why is a charge controller not necessary for a 5 watt solar panel?

My 5 watt solar panel car battery charger manual states that charge controller is not necessary for panels under 15 watts. I’m trying to understand the physics of why that’s the case. Even if my panel is only putting out say 15 volts at 350mA couldn’t it eventually overcharge a battery? What if the [...]