The document discusses achieving sustainability through high impact energy efficiency using solar rooftops. It notes that solar rooftops are achieving grid parity due to policy and regulatory support in states like Andhra Pradesh, Tamil Nadu, and Kerala. The document presents case studies on commercial and residential solar rooftop projects in various Indian states and finds internal rates of return for solar rooftop projects in Andhra Pradesh, Tamil Nadu, Karnataka, and Maharashtra to be in the range of 13-33% depending on the state and industry.

1. ACHIEVING SUSTAINABILITY THROUGH HIGH IMPACT ENERGY EFFICIENCY:
SOLAR ROOFTOP ACHIEVING GRID PARITY
- Anmol Singh Jaggi

2. Sustainability
Economy
Sustainability
Equity
Ecology
According to the Webster definition
•Involving methods that do not completely use up
or destroy natural resources
•Able to last or continue for a long time

3. Energy Efficiency
Have skylights & right orientation in building
Reduce Plug in Loads as they are controllable.
Replace Boilers / Furnaces with new versions
Have better ventilation / air conditioning

4. Energy Efficiency
Have skylights & right orientation in building
Most
How do you do that in an Existing Building?
Reduce Plug in Loads as they are controllable.
Solutions Are
How easy is it to control the natural habits of your team members?
Replace Boilers / Furnaces with new versions
Incomplete Or
What about the Loan you had taken to install the existing one?
Have better ventilation / air conditioning
Not Measureable
Can your 12 year old calculate the savings involved?

5. Introducing Solar
Install
Anywhere
Limitless
Potential
Cap the
Power Cost
Measurable
Impact
Customize
to Needs

6. Introducing Solar
Install
Anywhere
The Only Way to
Is to
Assured
Availability
Measurable
Impact
REDUCE
REPLACE
Electricity permanently
Electricity permanently
Cap the
Power Cost
Customize
to Needs

7. Provisions of the Companies Bill Relating to CSR
Under the Section 135 of new Companies
Act, 2013, passed by Parliament in August
2013, profitable companies must spend
every year at least2 per cent of their
average net profit over the preceding
three years on CSR works. This
mandatory CSR-spend rule will apply from
fiscal 2014-15 onwards. Those companies
that have a turnover of Rs. 1,000 crore or
more or net worth of Rs. 500 crore or
more or net profit of Rs. 5 crore or more
will have to comply.
As per Schedule VII
ensuring environmental
sustainability may be
included by companies in
their Corporate Social
Responsibility Policies.

8. Why Rooftop?
• Accelerated
Depreciation
Benefit
• Net Metering
• Andhra Pradesh
• Tamil Nadu
• Kerala
Policy &
Regulatory
Support
Technically
Feasible
• Well Proven
Technology
• Easy
Installation
Financial
Viability
Increased
Assurance
on Power
Supply
• 25 Years
Warranty

9. Solar Rooftop Overview
1 kW of Solar Panel:
• Generates 4 units in a day
• Requires 12 sqm of shadow free
rooftop space for installation
• The Panels come warrantied for 25
years
Matrix of operating scenarios
Equipments/Services
SUPPLY TO
BATTERY
TIME
GRID
STATUS
SUPPLY TO LOAD
Solar
Battery
Modules (Vikram/Waaree/ Reputed)
BATTERY
Grid
Solar
Rooftop
Grid
Charged

X

X
X
Discharged
X
X


Charged


X
X
X
Discharged

X
X
X
X
Charged
X
X

X
Discharged
Available
X
X

Charged
X

Discharged
X
X
Night
Not
Available
Inverter ( Danfoss/ Delta/ Reputed)
10,00,000

Day
Available
41,00,000
Rooftop
Available
Not
Cost 100 kW
System (Rs.)
Structure (Hot dip galvanized iron)
6,00,000
Electrical & Civil Works
7,00,000
Cables ( Any reputed)
1,00,000
X
Combiner Box
1,00,000
X

Design & Engineering
2,00,000
X
X
X
Contingency & Contractor Margin
5,00,000
X
X
X
Total
73,00,000

10. On Grid system SLD

11. Off Grid System SLD

12. Net Metering
It is an incentive program to encourage customers to install distributed generation
- Customers offset own electricity usage
- Customers are compensated for any electricity they generate and don’t use
Week 1
Mon
SOLAR Generation
Consumption
Tues
Wed
Thurs Fri
Sat
Produced from the Solar System
Consumed from Grid
Consumed from Solar System
Export to Grid
Week 2
SOLAR Generation
Consumption
Export to Grid
Sun
Extra
Mon
Tues
Wed
Thurs Fri
Sat
Sun
Produced from the Solar System
Week 1 Credit Consumed from Grid
Consumed from Solar System
Extra

13. Net Metering: Case Study Schools
Working Months
Solar System
Electricity Usage
Produces 10,000 units
50,000 units
Charged for
40,000 units
Electricity Usage
Solar System
2,000 units
Produces 10,000 units
8,000 units
credited
Vacation Months
Education
Institutes
Seasonal
Industries
Warehouse
Software
Parks

14. State: Andhra Pradesh (Commercial & Industrial)
Key Assumptions
IRR Comparison
Variables:
Accelerated depreciation included
21.63%
Accelerated depreciation excluded
Capital Cost
Rs.73,000/kW
Plant Load Factor
19%
Loan Terms
100% Domestic loans
Debt: Equity
70:30
Rate of Interest
13.0%
Tenure of Loan
7 years
O&M
Rs. 9 Lac/MW escalation @ 5.72%
COD
31-Mar-14
18.65%
16.48%
14.42%
Cost of Diesel consumption Rs14/kW
Power cut /day
2 hrs
State
Andhra Pradesh
Category
Industrial / Commercial
Tariff
Rs 5.70/kWh / Rs 6.50/kWh
Blended rate
Rs. 7.36/kWh / Rs 8/kWh
Industrial
Commercial

15. State Focus: Tamil Nadu (Commercial & Industrial)
Key Assumptions
IRR Comparison
Variables:
Accelerated depreciation included
Accelerated depreciation excluded
Capital Cost
Rs.73,000/kW
Plant Load Factor
18.5%
Loan Terms
100% Domestic loans
Debt: Equity
70:30
Rate of Interest
13.0%
Tenure of Loan
7years
O&M
Rs. 9 Lac/MW escalation @ 5.72%
COD
22.50%
31-Mar-14
17.10%
17.06%
13.33%
Cost of Diesel consumption Rs14/kW
Power cut /day
2hrs
Category
Industrial/Commercial
Tariff
Rs5.50/kWh/Rs 7.00/kWh
Industrial
Commercial

16. State Focus: Karnataka (Commercial & Industrial)
Key Assumptions
IRR Comparison
Variables:
Accelerated depreciation included
Accelerated depreciation excluded
Capital Cost
Plant Load Factor
18.50%
Loan Terms
100% Domestic loans
Debt: Equity
70:30
Rate of Interest
13.0%
Tenure of Loan
7 years
O&M
Rs. 9 Lac/MW escalation @ 5.72%
COD
21.37%
Rs.73,000/kW
31-Mar-14
17.10%
16.30%
13.33%
Cost of Diesel consumption Rs14/kW
Power cut /day
2hrs
Category
Industrial/Commercial
Industrial
Tariff
Rs5.50/kWh / Rs 6.70/kWh
Commercial

17. State Focus: Maharashtra (Commercial & Industrial)
IRR Comparison
Key Assumptions
Variables:
Accelerated depreciation included
32.87%
Accelerated depreciation excluded
Capital Cost
Rs.73,000/kW
Plant Load Factor
18%
Loan Terms
100% Domestic loans
Debt: Equity
70:30
Rate of Interest
13.0%
Tenure of Loan
7 years
Rs. 9 Lac/MW escalation @
5.72%
O&M
COD
Cost of Diesel consumption
21.43% 23.61%
16.34%
31-Mar-14
Rs14/kW
Power cut /day
2 hrs
Category
Industrial / Commercial
Tariff
Rs7/kWh / Rs 9.80/kWh
Industrial
Commercial

18. 1 kW Rooftop System
Solar Rooftop
Daily electricity generation (kWh)
4
Deration in generation during first 2 years
1.50%
Deration from the 3rd year
0.70%
Cost of the 1 kW solar rooftop system (INR)
1,45,000
Lifetime Cost (10 Years)
in lakhs
2.33
1.68
Diesel Genset
1.48
Cost of the 1 kVA Diesel Genset (INR)
17,000
Cost of diesel (INR/litre)
54
specific energy consumption of this DG set (kWh/litre)
3.5
Grid Tariff (at present)
5.5
Annual Escalation in tariff
5%
Lifetime of DG set (years)
7
Inverter with Battery
Solar
Rooftop
Cost of the 1 kW inverter system (INR)
50,000
Battery back up (hours)
4
DG Set
Inverter
with
Battery

19. Case Study: Residential & Small Commercial
Name: 12 kW Solar Rooftop Off Grid Project
Type of Load: Residential Load
Name of Client: Pratiman Textiles
Location: Surat, Gujarat
• The Client wanted to operate majority of its load
including Air Conditioners, television and other gadgets
on Solar with an adequate power backup.
• Aesthetics were of particular importance to the owner as
was the system reliability.
• Gensol invested in additional electronic equipment to be
able to operate delicate and expensive residential
equipment and further, gave the finishing reserved for
high end hotels.

20. Case Study: Residential & Small Commercial
Name:5 kW Solar Rooftop Off Grid Solar Project
Type of Load: Commercial Load
Name of Client: Sikar Sahakari Bank
Location: Sikar, Rajasthan
• Situated in rural Rajasthan, the Sahakari Bhoomi Vikas
Bank suffered from frequent power cuts.
• Gensol constructed the system to power the most
critical loads at the bank.

21. Case Study: 1 kW Residential
Name of Project: 10,000 Residential Rooftop Solar OffGrid Power Plant Program
ANERT Project by Govt. of Kerala.
Aesthetically designed kit with no separate civil
structures for residential load
Module capacity
1000 Wp
Inverter/PCU
capacity
Battery technology
1000kVA
Battery storage
capacity
Back up
in hours
5400Wh
7200Wh
12000Wh
4
6
9
VRLA or Tubular Gel

22. Case Study: Commercial (Large Rooftops)
Name: Solar Rooftop Grid Tied 100 kW VVIT
College
Type of Load: Commercial Load
Name of Client: VVIT
Location: Guntur, Andhra Pradesh
• VVIT is engineering college at Guntur in
Andhra Pradesh.
• In order to reduce their electricity bills
and gain energy security, VVIT appointed
Gensol to execute one of the largest
single rooftop project in the region.
• The project has been commissioned and
is now generating more than 450 units
per day

23. Case Study: Commercial (Large Rooftops)
Name: Solar Rooftop Grid Tied 130 kW
Type of Load: Commercial Load
Name of Client: NIMS Hospital
Location: Trivandrum, Kerala
• NIMS is renowned hospital in Kerala built under the
auspices of Noorul Islam Educational Trust.
• NIMS appointed Gensol to execute by far the largest
rooftop project in Kerala. Notably, the Hospital
management plans to run its critical processes on solar
power.
• The project is under construction and is scheduled to
be commissioned by November end.

24. About Gensol
Gensol, an ISO 9001:2008 certified company is a pioneer in
Solar Power Advisory and Project Execution. Gensol is an
advisor to 800MW+ commissioned or under construction
Solar PV Projects and has a cumulative portfolio of more
than 1 MW of rooftop solar power plants under execution.
360o Clean Energy Solutions:
• Solar Advisory & Project Execution
• Carbon Advisory & Trading
• Renewable Energy Certificate Advisory & Trading
• Power Trading

25. About Gensol
Few Facts:
•
30+ Trained Team - all Graduates and Post Graduates in
Energy and Environment
•
800 MW+ Solar Power Projects under advisory
•
1 MW+ Solar Rooftop Projects under Execution
•
Recipient of multiple awards including Business World Hottest
Young Entrepreneur and Economic Times Power of Ideas.
Quoted In:
Business Dailies: Business Standard | Economic Times Business
Magazines: Business India | Forbes India
Industry Journals: Power Line | Energetica | EQ International
Empanelled With:
Ministry of New & Renewable Energy
ANERT, Kerala (10,000 solar rooftops program)
Central Bank of India, PTC Project Financial Services, PFC,
L&T Infra Finance & Other Banks

26. Solar Advisory & EPC Services
Owner’s Engineer:
As Owner's Engineer, we guide our clients or investors through the complete process of project feasibility, financial closure, bid process
management, vendor finalization and supervision of project execution up till successful project commissioning which meets our strict
quality criteria.
Lender’s Engineer:
Being consultants to some of the leading lending institutions in the country, we assess the key parameters impacting the returns from the
project like generation, cost and conditions of the EPC Contract, preparedness of Project Developer for execution etc.
Detailed Engineering and Vetting of Drawings:
Gensol Solar Division is staffed with experienced Electrical, Electronics, Mechanical and Civil Engineers who undertake detailed
engineering of Solar PV Power plants on behalf of EPC Contractors and vetting of drawings for Project Developers and investors.
Permits & Clearances:
It takes more than 32 permits and clearances from Nodal Agencies, District Authorities, Distribution and Transmission Companies etc.
Gensol has an experienced liasoning team well aware of process and people to acquire these permits in time and in sequence.
Detailed Project Report:
A Detailed Project Report is one of the most important documents to assess the feasibility of project and to get financial closure. Gensol
with its sector expertise and established standing in the renewable energy consultancy not only gives the most exhaustive analysis of the
project but also enjoys the confidence of industries, investors and banks alike.
Solar EPC Services
Gensol, being a channel partner of Ministry of New and Renewable Energy (MNRE) has attained amongst the highest
allocation of subsidies for the Solar Rooftop Projects on account of its superior engineering, standardized procurement and
quick execution. Gensol has executed projects in the range of 1 kW powerpacks to 100 kW single rooftop power plants.

27. Advisory Experience Snapshot
Gensol is among the leading consultants to Project
Developers, Financial Institutions and Investors. Total
portfolio of Solar Power Projects commissioned or under
construction under advisory at Gensol is more than 800 MW.
Owner’s Engineer:
Lender’s Engineer:
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
33 MW - Sterling & Wilson, Rajasthan
25 MW - Alex Astral Solar Power Ltd., Gujarat
20 MW - Essel Infraprojects, Maharashtra
17 MW - Sunrays Power Solutions, Rajasthan
15 MW - NALCO, Orissa
6.5 MW - Haryana Power Generation Corporation Ltd,
Haryana Govt Enterprise
10 MW - Ghodawat Group, Rajasthan
5 MW - Konark Group, Gujarat
5 MW - Alex Spectrum Radiation Pvt Ltd, Rajasthan
3 MW - Par Solar, Rajasthan
1 MW - Agarwal Infratech Ltd, Gujarat
350 kW - Mapro Foods Pvt Ltd, Maharashtra
•
•
•
•
•
20 MW - Client Confidential, Gujarat
8.5 MW - Jain Irrigation, Maharashtra
5 MW - ABB Ltd, Gujarat
1 MW - L&T ECC Division, Rajasthan
2 MW - R V Akash Ganga, Uttarakhand
Detailed Designing & Design Vetting
50 MW - Welspun Energy Ltd, Rajasthan
25 MW - Sun Edison, Gujarat
20 MW - PLG Power, Gujarat
15 MW - MI Mysolar 24, Gujarat
15 MW - Dreisatz Mysolar 24, Gujarat
10 MW - Greeninfra Solar, Gujarat
10 MW - Millenium Synergy, Gujarat
6.5 MW - Sun Group, Gujarat
6 MW - Indiabulls Power, UP & Maharashtra
5 MW - ESP Urja, Gujarat
Feasibility Analysis & DPR:
•
•
•
•
•
•
•
•
20 MW - Sai Sudhir Energy, Andhra Pradesh
10 MW - Sai Sudhir Energy, Karnataka
5 MW - Chemtrol Industries, Rajasthan
2 MW - Shri Bhagirathi Textiles Ltd, Maharashtra
15 MW - Boyance Infrastructure, Rajasthan
5 MW - Sattva Salarpuria Group, Karnataka
3 MW - MWP Energy, Karnataka
1 MW - NIT Hamirpur, Himachal Pradhesh

28. Experience Snapshot
Gensol is among the forefront of Solar Rooftop execution
with more than 1 MW as its clientele ranging from 1 kW
power packs upto 130 kW single rooftop power plants.
Advisory:
•
163 MW Grid Connected
Gujarat
•
129 MW Grid Connected
Rajasthan
•
35 MW Grid Connected
Maharashtra
•
18 MW Grid Connected
Karnataka
•
15 MW Grid Connected
Odisha
•
6.5 MW Grid Connected
Haryana
•
2 MW Grid Connected
Uttarakhand
•
2 MW Grid Connected
Uttar Pradesh
•
1 MW Grid Connected
Himachal Pradesh
•
130 kW Rooftop Grid tied
Kerala
•
100 kW Rooftop Grid tied
Andhra Pradesh
•
92 kW Grid Tied & Off Grid
Gujarat
•
20 kw Grid Tied & Off Grid
Delhi
•
5 kW Off Grid
Rajasthan
•
2 kW Off Grid
Uttar Pradesh
•
Empanelled with ANERT, Kerala for 10,000 Rooftops
Execution:
Solar Program

29. Gensol Engineering Pvt Ltd | Gensol Consultants Pvt Ltd
Corporate Office
108, Pinnacle Corporate Park
Prahalad Nagar
Ahmedabad - 380015
Gujarat, India
Email:
Website:
Phone:
Fax:
Twitter:
solar@gensol.in
www.gensol.in
+91 79 40068235
+91 79 40068239
gensol_tweets
Gensol is one of the leading consultants and system integrators for Solar Power Plants. We boast of a portfolio of over 800
MW of Solar Photovoltaic Plants. Gensol is also a channel partner to Ministry of New & Renewable Energy and installs kW
scale Solar Rooftop systems on a turnkey basis with more than 1 MW of cumulative installations across the country.
The information contained herein is of a general nature and is not intended to address the circumstances of any particular
individual or entity. Although we endeavor to provide accurate and timely information, there can be no guarantee that such
information is accurate as of the date it is received or that it will continue to be accurate in the future. No one should act on
such information without appropriate professional advice after a thorough examination of the particular situation.