Smaller electric bill. Some people even produce so much solar power they actually sell power BACK to the power company. Once youve paid for all the equipment (you get a tax break for this) its free energy.
Main benefit is lowering your Electric Bil and doing so in a relatively "Green" manner. The basic system works through Solar Panels utilizing the Suns Energy; which then goes through a inventor which converts that Energy into usable Electricity. Unless you install a fully independent system with Battery Banks to store this electricity you still need Power provided from an outside source to (a) run the inverter, and (b) power your house after the Sun goes down. Fully independent systems are great but also expensive, require a lot of room for the battery banks, and require quite a bit of extra maintenance. So unless you do have these Batteries or some other power source, you're stuck without power along with everyone else if the Main Power goes even in full sunshine!:-(. For us installing 20 panels producing an avg. of 15-20 KW @ day, has lowered our Electric Bill by approximately 70%!!! And considering we live in the highest cost per KWH. In All of the U.S. and territories; that's A GOOD THING!:-).
• Looking at average insolation map (which includes day/night, weather, etc.), I estimate average of 4.25 kWh/day/m2 = 177 W/m2 • The area of the U.S. is 3.615×106 square miles – this is 9.36×1012 m2 • Multiplying gives 1.66×1015 Watts average available power • Multiply by 3.1557×107 seconds/year gives 5.23×1022 Joules every year • This is 50×1018 Btu, or 50,000 QBtu • Compare to annual budget of about 100 QBtu – 500 times more sun than current energy budget Source: http://en.docsity.com/en-docs/Solar_Energy-The_Physics_of_Energy_Devices-Lecture_8_Slides-Physics (skip to page 5 for more benefits)