subject: Solar Energy:Green Power You Can Rely On! [print this page] Of all components,solar panel accounts for the biggest cost,which may be 60 to 80 percent of the total project cost.However,when you have a rooftop solar power plant,you will become a power manufacturer.In long run,the cost of non-renewable fossil fuel electricity will increase,while the cost of solar electricity will decrease.There is also a socio-cultural impact.Use of solar power is a green initiative on your side,making you eligible for a 'carbon credit'!