Ministry of Environment, Forest The Energy and Resources

Download Ministry of Environment, Forest The Energy and Resources

Preview text

Ministry of Environment, Forest and Climate Change, Government of India

The Energy and Resources Institute

What is Solar Rooftop?
A rooftop photovoltaic (RTPV) system is an efficient technique that generates electricity from the sun using the solar panels mounted at the roof of the residential, commercial, institutional, or industrial building. These roof mounted systems are smaller in size as compared with ground-mounted photovoltaic power stations and features a capacity of 5–25 kW.

Why Solar Rooftops?
 The very first advantage of solar rooftop is that it reduces the requirement of land for addition of solar capacities.
 If we look at the consumer perspective  It reduces the dependency on grid power  It also mitigates diesel generator dependency and, of course, is a long-term reliable source.
In today’s world, RTPV is emerging as the most reliable concept for smart future

70 KWP Solar Power Plant at Government Model Senior Secondary School, Sector-10, Chandigarh

Is solar rooftop cheaper than diesel/ grid power?
Today, people are dealing with a dilemma about the cost of solar rooftops and diesel/grid power.
 At current pace, the cost of generating solar power is a little higher than the tariff charged from consumers by DISCOMS in most cases (other than commercial). However with the capital subsidy (up to 30 per cent) or so, it may be possible to generate power between `5.0 and `6.50 per unit for the next 20 years.
 According to an analysis (, there are several categories of consumers (both residential and commercial) for whom RTPV is cheaper than grid power.

Rooftop solar PV offers an opportunity to fix a part of energy cost for the next 25 years. The levelized cost of power from solar PV plant remains constant through the lifetime of the plant, but the cost of both grid and diesel power will keep on increasing. A rooftop solar power plant installed today will provide cheaper-than-grid power in a few years’ time once the grid tariffs rise beyond the cost
of solar power.

The concept of RTPV segment is very new

to India, but it is grooming itself and has

a very strong growth potential. Earlier,

Ministry of New and Renewable Energy

(MNRE) formulated a rooftop subsidy of

30 per cent, which further reduced to

15 per cent and now it is at zero per cent,

but MNRE is in process of formulating a

new rooftop policy based on net-metering,

including consideration of a

capital subsidy.

 In India, states like Gujarat, Andhra Pradesh, Himachal Pradesh, Delhi, and

Potential of rooftop solar power generation in Delhi for different area types

many more have already initiated

their first step towards RTPV in commercial as well as residential complexes.

 Delhi NCR itself has a great potential of implementing about 2.6 GW of solar PV at its rooftops. The total land area of the NCT is around 1,484 km2 with around 700 km2 of built area.

Rooftop Solar in Delhi’s Residence
Being an inspiration for Delhi’s residents, Mr Ashwani Kapoor of Kailash Colony and Mr Ravi Bansal of Ishwar Nagar took a remarkable initiative to implement RTPV model at their residences. Not only this, Mr Kapoor is the first person to get net-metering installed to his plant by BSES members and Mr Bansal has the highest capacity RTPV plant under residential level in Delhi till date.

Mr Ashwani Kapoor standing below his installation

 As per the analysis done by Mr Kapoor, his electricity bill has decreased by 50–60 percent from `25,000–30,000 to `8,000–10,000.
 Mr Bansal have not received any bill till date as his power need is met by the plant itself and the surplus power is transferred to the grid.

Mr Ravi Bansal (left) and Mr Surindar Ahuja (right) Vicepresident, Medors Renewable Energy Pvt. Ltd. Solar panels are mounted in the form of shades so that the roof space is not occupied

Inverter at Bansal’s residence is Fronius
Symo 20

Key features of the RTPV plant

Mr Ashwani Kapoor’s Installation
 He invested around 15 lakh to install 7.2 kWp (9 kW) grid-connected solar panel and 2.4 kWp (6 kW) off-grid connections.
 The solar panels installed are Medors 300 Wp, 72 cell mono-crystalline modules with 24 panels.
 PV inverter at his residence is SMA Sunny Tripower 9000 TL rated for 9 kVA with dual MPP tracker and four strings.
 The off-grid inverter is coupled to 30 number of Ah 12 V batteries (Artheon) with 5 years warranty, which stores the power generated from solar during daytime.
 The off-grid system is used to power up the lighting loads and security systems of the building.
 There is a bidirectional energy meter installed for net-metering both for import and export of the power and also a gross meter for total solar generation.
 Regarding the monitoring of the system there is an inbuilt data logger and web server with a mobile app.

Mr Ravi Bansal’s Installation
 He invested around Rs.14.25 lakhs to install 20 kW on-grid connected solar rooftop model to meet his total consumption.
 The solar panel installed in his residence is, Fronius Symo 20 rated for 20 kVA with dual MPP tracker and six strings and its maximum efficiency is 98.1 per cent.
 He has a bidirectional energy meter for net metering both for imports and exports of the power and a gross meter.
 The monitoring of this system is very easy and efficient, as it has an in-built data logger and web-server, with mobile app for remote monitoring just like Mr Ashwani Kapoor.
 As far as the maintenance of the plant is concerned, it requires proper washing of the solar panels. And for that he is planning to install water canon system at his place.

Mr Ravi Bansal and Mr Ashwani Kapoor have done a great job by installing solar rooftops at their residence. They are green citizens of Delhi who took an initiative
to trust non-conventional sources of energy over conventional source and are in no loss today.
Now it’s your turn to put a step forward and remove Delhi from the list of ‘Most polluted city’ to a list of ‘Most clean and intelligent
city’ or let’s say a ‘Smart City’.

Mobile app for remote monitoring

Cost of components for 1 kW plant
A rooftop solar PV system costs approximately `100,000 per kWp (kilowatt peak) including installation charges but without batteries and without considering incentives (which are discussed further down). The cost breakup for a 1 kWp system is given below:

Bidirectional energy meter for analyzing import and
export of the power

PV modules (Crystalline) Inverters
Balance of system (cables, etc.) Installation Total

52,000 23,000 17,000 8,000 100,000

Percentage of total cost
52% 23% 17% 8%

Channel Partners as empanelled under MNRE

S.No. 1 2 3
4 5

Name of Companies A. Energys Pvt Ltd
Bluebird Solar SBU of Bluebird Power Controls Pvt. Ltd.
Boond Engineering & Development Pvt. Ltd.
Medors Renewable Energy Pvt. Ltd.

8/26, Ist Floor, East Patel Nagar, New Delhi–110008
103, FIE, Patparganj Industrial Area, Delhi–110092
70, Rajasthani Udyog Nagar Industrial Area, G.T. Karnal Road (Opposite Jahangirpuri Metro Station) Delhi–110033
202 Mavilla Apartment Mayur Vihar Phase 1 New Delhi–110091 B-552, New Friends Colony, New Delhi–110065

Contact Details
01145008391, 9910904778
01122156913, 981824471
01147052209, 9643838009
01126169056, 9717349377

[email protected] atlantaenergy.
in [email protected]
[email protected] bluebirdsolar.
[email protected]
[email protected]

http:// atlantaenergy.
in/ http://www.
http://www. bluebirdsolar.
http://boond. net/
www.medors. in

For more information:
The Energy and Resources Institute (TERI)
Darbari Seth Block, IHC Complex, Lodhi Road, New Delhi-110003 Tel: +91 (0) 11 24682100 or 41504900 | Fax: +91 (0) 11 24682144 or 24682145
E-mail: [email protected]; [email protected] | Web:

Preparing to load PDF file. please wait...

0 of 0
Ministry of Environment, Forest The Energy and Resources