India is a country that has clear skies and tropical sunlight for almost 300 days a year. So, it comes as no surprise that it is one of the leading solar energy generating states in the world because this country is placed at an ideal geographical location. The target set by the Ministry of New and Renewable Energy by the year 2022 is to make 175 GW capacities of solar installations. Looking at the completed, ongoing and upcoming projects, this target seems achievable. These projects are a combination of different types: on-grid solar system, off-grid solar system, and hybrid solar system.
There are different ways to harness solar energy, but if someone is looking for home solar solutions, rooftop solar panels are the popular choices because of their low installation costs and other benefits. The things required to install a rooftop solar system are solar panels, an inverter, AC/DC switches and electric conduit. However, the only thing easier and simpler about installing this system is its cost because actually fitting it is a lot difficult than it sounds. There are certain things that you need to consider before even buying an actual solar system.
Condition of the Roof
Generally, rooftop solar panels come with a service life of 20 to 25 years, and the first thing you need to consider is the condition of the roof where you want these panels installed. It would be pointless to think about a solar system when your roof is really old or really damaged as the panels would not last for the whole service life. If the roof is unsuitable, you would have to think about repairs before even deciding on acquiring solar energy because it would be pointless to install a system only to get it dismantled in a few years. If you do this, you would be paying an unnecessary amount for installation, dismantling and re-installation. Also, you need to have enough space on the roof, plus it needs to be an open, shade-free area so that sunlight does not get obstructed during the daytime.
Slope of the Roof
This plays a major role in harnessing the photons from the sunlight effectively and efficiently. The slope is also necessary for the drainage of water during rainy seasons. If the slope is facing South, it can be considered an ideal location to install solar panels to generate the maximum amount of electricity throughout the day. Along with that, the roof inclination needs to be in the range of 10 to 30 degrees for proper water drainage and debris removal.
Calculation of Weight the Roof Can Withstand
There is a limit to how much weight a roof can bear, and any roof can easily collapse if this calculation is not properly determined. This evaluation can only be completed by a professional who has experience in judging the roof stability. The same professional will conclude if additional support is needed after a thorough roof inspection.
Rate of Consumption of the Building
Different households have varying power requirements depending upon the variety of appliances, machinery and gadgets, which need to be powered by electricity. So, it is advised to analyse the consumption rates and other needs before installing the required number of panels. A solar panel generally comprises 36 to 72 PV cells, where each cell generates approximately 0.5 V of power. The number of panels required can be decided accordingly, taking these numbers into consideration along with the required amount of energy required per day.
Suitable Type of Solar Panel
The most popular types of solar panels in India are monocrystalline and polycrystalline solar panels. The major difference between these two types is that monocrystalline is made up of a single crystal of silicon, whereas polycrystalline is made up of multiple crystals of silicon. Both have their own advantages and disadvantages, and the correct one should be chosen based on the individual efficiencies of panels and advice of a solar installation company.