Renewable energy is energy garnered from natural resources which can naturally replenish themselves over short periods of time like the following:
Solar energy: The sun is a constant and reliable source of energy as well as being an environment friendly source. Appliances that run on solar energy last longer and contribute significantly to lowering utility bills. Photovoltaic cells convert solar energy into electrical energy. PV Cells and panels are commercially viable, reliable, easy to transport, install and inexpensive in the long run.