This is an initial presentation of techno-economic analysis and feasibility study of Stand Alone solar rooftop systems in India

1. ID5070 Term Paper Initial Presentation
V Himasree A.K. Koustubha G Greeshma Theresa
MM17B113 ME18B126 ME18B139

2. Problem Statement: 100% RE household with a 3 kWp solar rooftop, with induction
cooking - feasibility study and techno economic analysis
Abstract:
To meet the Paris climate deal, annually 55.3 gigatonnes of carbon dioxide has to be reduced worldwide.
About 73.2% of global carbon dioxide emissions are from the energy sector. Home solar is emission-free,
and renewable energy technology, alternative to fossil fuels which are depleting and harmful to the
environment. Though it is widely accepted that the incorporation of solar energy into our lives helps in a
paradigm shift in energy production, installation charges are generally high and solar energy is not
considered to be a reliable source in households. Energy from solar rooftop depends on various factors
like location, weather condition, solar irradiance, and load consumption.[1] The importance of the
existence and economic viability of home solar creates awareness in the public. In the future, an increase
in the usage of solar energy makes the technology cheaper. This paper discusses power requirements,
feasibility study, and economic analysis, highlighting a standalone setup for a home solar rooftop.
Keywords: standalone solar, LCOE, LACE, techno economic analysis, renewable energy

3. Motivation
1. Environmentally friendly, 0% carbon emission method to produce energy
2. Addressing the issue of climate change and global warming has become an
utmost important aspect, therefore the shift to renewable energy is important
3. Tax exemption through policies is given by government for renewable energy
4. 100% Renewable Energy systems are economically viable
5. Solar energy increases the grid security
6. Profits can be made by selling the excess energy produced to the grids
7. The main focus of this paper is to show the reliability and feasibility of stand
alone solar rooftop over the conventional energy source

4. Timeline
Week 1: Study about Solar Energy Technology and available models for different applications
Week 2: Study about Rooftop Solar Home System
Week 3: Components specification according to a typical household requirements
Week 4: Energy Storage systems (Batteries and Inverter)
Week 5: Collecting data regarding installment and operational costs at different regions
Week 6: Economic implications
Week 7: LCOE/LACE calculations
Week 8: Conclusion and paper editing

5. Proposed paper structure
1. Introduction
2. Home solar rooftop system 3 kWh
3. Battery size considerations
4. Solar radiation
5. System analysis
6. Cost analysis
7. Conclusions
8. References

6. Relevant literature and Inference
Literature: https://www.seriius.org/pdfs/sei3_cstep-report_techno-economic-analysis-of-stand-alone-solar-pv-battery-based-micro-grids-in-
karnataka.pdf
Inference:
In view of increasing fuel costs and environmental concerns in future, utilization of
solar energy can also reduce the electricity bills in long run. It an viable alternative to
the fossil fuels. As the technology is also clean, we can contribute to greener
environment. Through this paper, it can be conveyed that the solar rooftop system can
provide electricity to off grid areas as well and that it can take care of the complete
household needs not just the sustenance. Undertaking of various government
schemes, people can be enlightened about various benefits of shifting to standalone
solar rooftop system like tax exemptions which ultimately helps in income saving.
Techno economic analysis helps us selecting the best model with good tradeoff
between the cost and reliability.

7. Solar household system analysis
● Solar energy is one of the lowest cost technologies for generating electricity.
● The trade off between the cost and reliability of the system is essential for
stand alone solar system (off-grid).
● LCOE is calculated as the ratio of NPV of the system cost to the NPV of the
electricity generated (here we take the total energy supplied to the load)
● Battery system is used for storing the excess electricity which can be used in
the night time. Lower LCOE is observed when the battery discharge is
restricted to 6 AM -6 PM instead of letting the battery to discharge all the time.
● Off grid solar systems also reduce the transmission costs. And it can be a
potential source of electricity in rural areas.

8. Solar household system analysis
● Different capacities of battery and PV size (in our case the size is 3 kWh) are
considered for calculation of reliable battery size and PV size.
● Inputs for the techno-economic analysis are load demand, solar radiation
data, PV Modelling and Battery storage modelling.
● We can not directly take a system with low LCOE, as there is a chance of low
reliability (greater than 30% unmet load)
● LCOE gives the cost of the generated electricity considering the entire
lifecycle of the solar system. It helps in identifying the system with better
savings.

9. Solar household system analysis
Input values for off grid solar rooftop/ stand alone solar :
Cost of off grid 3kW solar rooftop including installation- INR 2,40,000
(includes 9 solar panels, 3.5KVA off-grid solar inverter, 4 solar batteries, one
junction box, DC & AC cable and other solar necessary accessories) [2]
According to [3] the cost for the same is INR 3,94,000
Operational and maintenance costs: INR 48000 (2% of initial system cost * 10
times per year) [4]

10. Solar household system analysis
Input values for off grid solar rooftop/ stand alone solar :
Energy demand: 4 kWh+10 kWh=14 kWh(per day)
Solar Induction stove: maximum 4 kWh (for 2hrs) [5]
(10 kWh includes Fan and tube lights, Kitchen appliances, Other utilities ( TV, AC,
washing machine, refrigerator, motor))
*considering typical indian household with 2 BHK

11. THANK YOU