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Solar energy is the answer to America’s energy crisis. So, what is solar energy used for then? 1. To provide heating  2. To provide electricity

Thermal Energy

Thermal Energy is everywhere. It’s lights up our days. It heats the earth, our bodies and our homes. It dries our clothes and gives us produce like sun-dried tomatoes. All for free! Perhaps the most widely used green energy technology, solar hot water can provide year-round hot water for your home, pool, or commercial building. Solar hot water is perhaps one of the most cost-effective solar technology on the market. With federal tax incentives and a base of qualified installers it’s easy to get into this technology.

It’s also used to heat water for domestic use or even pools. There are two ways in which water can be heated:

1. Actively, when a conventional heating element within the solar hot water system heats water on hot days.

2. Passively, when water is preheated before it is delivered to the cold inlet of a conventional gas/ electric water heater.

Electric Energy

Electric Energy uses the power of the sun to produce electricity through solar cells, otherwise known as photovoltaics (PV). It can be applied in three ways:

1. Stand-alone

2. Grid-connected

3. Back-up

Stand-alone: also called Solar Home System (SHS):

A system not connected to the grid. More often than not, these systems are installed in remote areas where there is no utility-supplied power, like remote holiday cottages.

It is often cheaper to install a solar energy system than lay electricity cables to the site. Excess energy can be stored in a battery for use during times where there is no sunshine.
Grid-connected:

A system where utility supplied electricity is connected to the property, but the owners wish to harvest clean, free energy from the sun. Usually in a quest to live a more sustainable, environmentally friendly existence.

Electricity is supplied firstly from the solar energy system, then the connected battery if one has been installed and finally from the grid if there is still a need.

Back-up:

A system connected to an unreliable grid or one of poor quality. These types are usually installed in areas where a lot of power blackouts occur. A small system will service the most important electrical appliances and lights, but a bigger system will be required to keep the fridge running during a blackout.