https://www.usgbc.org/articles/top-four-benefits-installing-solar-panels-your-home
There are many benefits to using solar power in your house. First, solar energy does no harm to the sun or the environment. Second, solar power is much more cost effective then traditional electricity. Finally, it is practically an infant source of energy.
This relates to engineering because it is a device to convert light energy to electric energy in an natural way.
