FAQ's
- What is Solar?
- What is the difference between Solar Thermal and Solar PV (Electricity)
- How does Solar Thermal work?
- What are the benefits of a Solar Thermal Installation?
- How is energy production impacted by cold and cloudy weather?
- How does Unitech Solar installations differ from those of other system integrators?
- What is a typical project's timeframe from assessment to completion?
- What will be my system's reliability?
- How long do Solar Thermal systems last?
Solar Energy can be classified into two categories, Thermal and Light. Photo-voltaic cells (PV) use semiconductor-based technology to convert light energy directly into an electric current that can either be used immediately, or stored in a battery, for later use. PV panels are now becoming widely used as they are very versatile, and can be easily mounted on buildings and other structures. They can provide a clean, renewable energy source which can supplement and thus minimize the use of mains electricity supply. In regions without main electricity supply such as remote communities, emergency phones etc, PV energy can provide a reliable supply of electricity. The disadvantage of PV panels is their high cost and relatively low energy conversion rate (only 13-15%). Thermal solar on the other hand has average efficiency levels 4-5 times that of PV, and is therefore much cheaper per unit of energy produced.
Thermal energy can be used to passively heat buildings through the use of certain building materials and architectural design, or used directly to heat water for household use. In many regions, solar water heaters are now a viable supplement or alternative to electric or gas hot water production.
Thermal energy obtained from the sun can be used for a number of applications including producing hot water, space heating and even cooling via use of absorption chilling technology.
Solar thermal collectors collect radiation from the sun and actively convert the energy/radiation from the sun into Heat. When the suns radiation hits the solar collector, the Evacuated tubes act as an absorber and insulator that transfers the heat to the heat-pipe which then heats your DHW and heat.
- Solar panels convert sunlight into electricity via the photovoltaic process.
- Power conditioning equipment converts the electricity from the panels to utility-grade alternating current.
- The meter measures net power usage, turning backwards when the system generates more power than is needed.
- The utility grid supplies supplemental power when demand exceeds the solar power system's output and absorbs excess when the system output exceeds demand.
- The customer electrical load draws power from the solar power system and/or the utility grid.
Rooftop – Still the most common system built, rooftop-mounted systems are fairly inexpensive. PV can be installed on any type of roof, but some roofing types, such as standing seam, are easier than others. Design considerations include penetrations or ballasting that is suggested or mandated by wind and seismic codes and the age of the roof. When considering installing a PV system that may operate in that location for 10-40 years, it is important to consider the age, warranty, and general condition of the roof.