Interest in solar energy is soaring – and for good reason.
Humans have harnessed the power of the sun since time immemorial, using it to tell time and start fires. And we’ve only gotten better at it. These days, we use photovoltaic (PV) panels to generate renewable solar energy, but the idea is basically the same. We’re using one of the most abundant energy sources to create a more comfortable and environmentally friendly way of life.
Solar power is a growing trend – globally, including in the United States. Since 2010, domestic solar installations have grown 35-fold to an estimated 76 gigawatts, according to the Department of Energy.
Solar supplies a relatively small 3% of U.S. electricity, but it accounts for more than a third of all the new power plants built in this country.
In just one hour, more energy from the sun falls on the earth than is used by everyone in the world in an entire year. The challenge is how to efficiently collect, convert and store all that energy.
Did you know that unused energy from a solar-powered home gets sent back to the grid? If your state has “net metering” – and most do – you get a credit on your power bill. For those without net metering, batteries can be installed to store solar energy for later use.
Taking up valuable land is not necessary. The cost of solar systems on residential rooftops has dropped over 30% in the past five years. A 7kW system would total about $20,000 before tax credits, and $15,000 after. (The federal solar tax credit reduces cost by 26%, and some states, local governments and utilities offer other rebates and credits that can further reduce costs.)
Despite being dubbed the Sunshine State, Florida does not lead the U.S. in solar power. It’s California. And globally, it’s China with the U.S. and India right behind. However the highest penetration, around 10%, is in smaller countries such as Greece and Honduras.
Sources: Raymond James research; scientificamerican.com; energy.gov; thoughtco.com; census.gov; uwsp.edu; news.energysage.com