Understanding of Various Components of Roof Top System


A Solar System generally  comprises of the following elements: Solar Panel, a Charge Controller, a Power Inverter, a Monitor and Electrical Distribution System. As seen with each other technologies each component has different manufacturers , quality, features and price.

Solar Panel: A Solar Panel consists of silicon crystals which converts the rays on the sun into electricity. They supply electricity, required for charging batteries and running the appliances either directly or through power inverter. A combination of panels is used to produce the electricity which is  more than the  required and excess of energy is stored in battery for nighttime or cloudy days. They are available in different sizes, voltages and amperages. They can be connected be in series, parallel or both depending on design requirements of the system.

Charge Controller: It is a vital component and functions like the brain of system. It monitors the electricity produced by solar panels and then regulates the electricity to charge the batteries and prevent them from over-charging. It helps to increase battery life and performance. Different technologies are available for selection including Pulse Width Modulation (PWM) and Maximum Power Point Tracking (MPPT) charge controllers.

Batteries: They are required to store excess power generated from solar panels for later use. Without battery, power would only be available when the sun is shinning. The batteries are available in different voltages and varying amp-hour ratings depending on system requirements.

Inverter: It converts the DC Volts produced by solar panels into AC volts. The inverters can be used to charge batteries by connecting it to the backup generator or an AC electrical source. It is important to choose the right inverter for the demand and power requirements of the system so that the components can function properly.

Monitor: It is used to monitor the condition of the battery, the power generated by solar panels and consumption of power by the users. The monitors available in the market will provide you with information for protection of batteries, help’s to locate the source of the system  problems where they occur and allows to reduce generator use , by knowing when to shut it down.

Generator: Gas powered generator is a good investment to keep the batteries charged during extended period of rainy/cloudy days. It can also provide temporary power when there is high demand for power. It is a handy tool to have when sunlight is not available.

On Grid: When to system is connected to local utility.

Off Grid: It is a system where solar powered structure would not be connected to external electrical device.

Grid Tie: It means that you can use solar energy when it is available and when that source is not available, have the system automatically switch to on-grid electricity from the power company.

System Components

System Components

Image Source: http://www.energyjump.co.uk

Posted by: Prateek Sikka

 

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