public class Add { private static String rightJustify( String s , int newLength ) { while( s.length() < newLength ) { s =   + s ; } return s ; } private static void justifyAndPrint( String leadingText , int number , int totalLength ) { // convert the number to text String s =  + number ; System.out.println( leadingText + rightJustify( s , ...
Why Solar Energy? A typical residential solar PV panel system in the U.S. costs $3.60/watt after installation, and the solar panels typically save the customer over $20,000 (net) over the course of 20 years. Learn more about the many advantages of solar energy.
The good news is that, as solar panels become more popular and demand increases, theyâve become cheaper to install. Solar Action Alliance estimates the average cost to install solar panels to be between $11,410 and $35,280, depending on the size of the solar system. Hereâs how that breaks down for a 5-kilowatt (5kW) system, the average installation for a home in the U.S.: