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SOCIAL AND INDUSTRIAL SOLAR SECTOR INFORMATION

Introduction


In a solar rooftop system, the solar panels are installed in the roof of any residential, commercial, institutional and industrial buildings. This can be of two types (i) Solar Rooftop System with storage facility using battery, and (ii) Grid Connected Solar Rooftop System.

(i) Solar Rooftop System with storage facility using battery: Such rooftop system has battery as storage facility. The solar electricity is stored in the battery and can be utilized during night also when the sun is not available.

(ii) Grid Connected Solar Rooftop System: These systems generate power during the day time which is utilized fully by powering captive loads and feed excess power to the grid as long as grid is available. In case, where solar power is not sufficient due to cloud cover etc., the captive loads are served by drawing power from the grid.

How does solar rooftop system work?


Basically government is motivating for the upliftment of Grid Connected Solar Rooftop System by providing different subsidy schemes.

1) Solar panel generate DC current which is transferred to a inverter.
2) Inverter converts the DC power into AC power and supply it to a meter.
3) Meter do a dual work it supply the power to a house and transfer the access amount of power to grid (discom).
4) If the self use excess the total generation then it is borrowed from the grid(discom)
5) Final setoff is done at the end off the month.
6) If total generation is more than the actual unit used by the consumer than the difference between them is converted on the rate decided by the particular discom.

Benefits of adopting Solar Power by schools, colleges & institution


• Reduction in electricity bills – The per unit cost of electricity from the grid shall rise with the impending rise in cost of non-renewable fuel in the future. The only alternative for educational institutes to reduce their high cost of electricity consumption is to generate their own electricity through solar



• No extra space required – The solar panels to be installed in the Solar PV system only require open spaces which are readily available on school rooftops. Off Grid systems eliminate the use of batteries thereby requiring minimal space for the PCUs/inverters in the system.


• Power Saving for other applications – Many institutions in Tier 1 Cities, have fully AC premises and high power IT labs and equipment which increase their electricity cost drastically. Adopting solar can help in huge reduction in power costs for these applications as well, with lesser load on the authorities.


• Grid tie or On Grid PV systems prove to be best options – The maximum power consumption of an educational institute take place during the daytime. The Su-Kam Grid tie solar system which eliminates the use of batteries completely is the best option for such institutions.


• Adopting an eco-friendly approach – Many schools/colleges or universities can contribute and set an example for other universities and its students for adopting an eco-friendly approach towards power consumption. There is a vast scope to improve energy efficiency in schools and universities. Several studies have shown that avenues to curtail energy use to the extent of 30-50% in end uses such as lighting, cooling, ventilation, refrigeration, etc.


• Govt. Subsidy – Government gives 30% subsidy on solar installation so the cost of the solar solution goes down marginally.


• Becoming a differentiator – Many Private Schools/Institutes/universities have very high fee structures which make it a compulsion for them to showcase themselves as a differentiator . An ideal way to do the same would be to adopt solar energy which shall be noiseless, eco-friendly and pollution free. Going solar and not using DG sets shall bring down the Noise/environment pollution and pose lower health risks to children; this can be a major deciding factor in the parents’ choice of school for their children.
Having a live & working solar system on campus gives schools an exciting opportunity to enhance their curricula and build positive change in their communities. Students won’t just read about renewable energy, they can use real data from this solar installation to understand how solar is producing energy for their school and saving money.

Obstacles


• Rooftop space
The capacity of the solar plant that can be installed in a factory may be constrained by lack of sufficient shadow-free rooftop space. Many factories have north light roofing special mounting structures may be required to mount the solar panels.



• Roof type
Solar panels can be easily installed on concrete roofs, but metal and asbestos roofed structures may present some challenges, depending on the load-bearing capacity of the roof.



• Infirm power
Solar power is dependent on the sun shining, and output varies depending on meteorological conditions e.g., passing clouds can temporarily reduce the solar plant’s output. Therefore night time applications will require other sources of power, or power from batteries charged through. Hence, solar power for critical equipment should be used in conjunction with another source of power.


• Inverter weight .
The DC power output from the solar panels needs to be converted to AC via an inverter which can be very heavy: a 100 kW inverter will weigh about 1,000 Kgs but occupy only a few square feet of space. If the construction cannot support this weight the inverter may need to be placed on