Implementing solar trackers for your household purpose has become easy during these days. However, it is necessary that you have a clear overview of what makes up the typical solar racking system. A proper guide is always helpful to help you make your own solar trackers by providing you an overview of the components. Actually a solar photovoltaic (PV) racking system is made of several components. The module of the PV system is the smallest component of the entire unit. These connected sets of solar cells are generally sealed in order to protect themselves from the environment. When a group of modules are attached together, it is termed as a panel.
The manufacturers put together a group of solar panels in order to make a sub-array. The sub-array is actually a part of the array assembly and that can be considered as a unit. It also delivers some of the fractions of the total system output. An array is actually an assembly of sub-array as well as panels or modules. It also includes a support structure; however, with no non-PV components. The array-field, on the other hand, is a combination of all the arrays in the system.
Here are some important components of PV racking systems:
Modules: It is a collection of solar PV cells. All the cells in the modules are connected in series and they are sealed for protection against the environment. Generally 5-150W sizes modules are available in the market. The cells in the modules are generally placed in an EVA sandwiched between the front cover and the back protection. The manufacturers also provide moisture proof back cover. A terminal box is also there where the cables are placed.
Array Field: All the modules are connected into a series of strings and they together provide the correct voltage. The modules placed in the strings are matched according to their current. The module with the lowest current indicates the string current. The manufacturers also use by-pass diodes across the modules in order to limit all types of damages due to mismatch. If any strings are mismatched, the strings are then matched in terms of total voltage and at the same time connected in parallel to provide the required system current. In order to prevent battery discharge at night, you need to connect a blocking diode in the series with each string.
Balance of System Components: Balance of System Components is also known as BOS. It is an important part of the solar racking system and it contributes greatly to the system. They are generally separated into electrical and mechanical components. The manufacturers generally provide these electrical components including: battery, cables, fuses, earthing, inverters, maximum power point tracker, protection against lightning, charge regulation. The mechanical components also include the mountings that can be fixed or track sunlight.
You can measure the performance of your solar power system by using the performance ratio. Performance ratio is actually the ratio of actual energy obtained over a period to the ratio of theoretical energy possible over the same period.
Orion Solar Racking specializes in the development, manufacturing and marketing of solar racking solutions. Since its foundation, Orion has released a wide range of high-quality and innovative photovoltaic racking systems. We provide roof and ground mounting solutions for residential, agriculture, industrial, government, commercial and utility grade projects. Our mission is to promote renewable energy solutions making the installation of solar trackers simple.
Make Your Own Solar Racking System – A Systematic Guide