Solar energy is a “green, environmentally-friendly energy solution. By using the sun as a natural, clean source of energy, solar energy is able to create electricity or heat in a way that doesn’t involve any fossil fuels being burned or undesirable emissions into the air. Furthermore, the sun is a sustainable, renewable source of energy that isn’t going to run out or be depleted, so there’s no need to worry about dwindling natural resources with solar energy.
Of course, when it comes to solar energy there is one limitation that needs to be considered. The sun isn’t always out. That makes solar energy an intermittent source. If it’s cloudy, raining, or simply dark outside, solar energy systems aren’t absorbing the sun and, as a result, aren’t able to produce energy. To compensate for this, most solar energy systems are built to store energy or they have a backup source of energy, like the electric grid. This allows the energy user to still get power even when the sun isn’t out at the moment.
For solar energy technologies, there are two basic types – active and passive. Active solar technologies utilize solar PV (short for “photovoltaic”), heated water, heat, or solar thermal electric to produce electricity. Passive solar, on the other hand, creates heat and is used for lighting structures.
Below is a closer look at some of the most popular solar energy technologies.
- Solar PV—A solar photovoltaic (PV) system uses components like solar panels to absorb sunlight and convert it into electricity, an inverter to switch the electrical current from DC to AC, and other accessories to complete the system. Panels are very common and can be installed on all sorts of structures and properties. They can power anything from a home to an entire commercial facility, depending on their size.
- Passive Solar—In passive solar systems, the sun’s energy is utilized through the actual design or layout of the structure. Everything from windows to floors to walls are meant to distribute energy from the sun, heating a structure in the winter and rejecting the heat during the summer. No mechanical or electrical devices are used.
- Solar Heating—In some cases, passive solar might not be enough, so supplemental heating is needed through the use of certain other active solar technologies. A space heating system can utilize a solar energy collector to concentrate and distribute heat through the structure. For more robust applications, parabolic trough collectors, evacuated tube collectors, and other advanced solar heating technologies may be useful.
- Solar Thermal Electric—Solar thermal electric technologies are somewhat similar to solar heating because they too harness sunlight to create heat. The difference, however, is that solar thermal electric technologies create an amount of heat great enough to power a generator that then pumps out electricity.
Businesses and homeowners alike can take advantage of solar energy technologies to go green and save money!