Solar Roof top

Types of solar systems:

There are three types of solar systems that can be considered.

1. On-grid systems:   One of them is the on-grid system in which the rooftop solar system is integrated with the main grid supply. This system allows power to be used from the grid supply only when the rooftop solar system is unable to supply the required power. Thus, a well-planned rooftop system can efficiently supply power without using grid supply saving expenses otherwise incurred on using power from the grid. In fact, this system can earn revenues as any excess power generated can be fed to  the grid for which DISCOMs pay compensation using ‘net metering’.

2. Off-grid systems  :   The second one is the off-grid system in which the rooftop solar system is not linked to the main grid. This system can run on its own with its own battery. The solar power generated from the rooftop solar system charges the battery which is then used to power various applications. This system is very useful when there is no grid supply or when the supply is very erratic with frequent breakdowns.

3. Hybrid systems :The third one is the hybrid system in which both on-grid and off-grid systems work in tandem. In this type of system, though a battery is used, the advantage here is that after the battery is fully charged the excess power generated is fed to the grid which generates additional revenues for the consumer.


How much rooftop to use

Based on the availability of sunlight and the space available on the rooftop the maximum power that can be generatedcan be determined. Further, based on the type of system – on-grid, off -grid or hybrid – the homeowner can decide on thespace to be allocated on the rooftop for producing electric power.


The homeowner can make a cost analysis and decide on the quantum of electricity to be produced so as to be profi table.This could include meeting the home owner’s power needs and the amount of power that can be transferred to the grid togenerate additional revenues.

Rooftop solar systems are becoming a popular source of electric power because it is a renewable energy source and it isabundantly available during the day. With careful planning, implementing an appropriate rooftop solar system cantranslate into never-ending electric power supply at minimal recurring expenses.