Need to setup solar power plant in India ?

Indian solar tariffs have reached a paradigm shifting new low after the final reverse auction round for 750MW capacity in Madhya Pradesh followed through into a nail biting second day.

At the time of writing, the Rewa solar park auction is still ongoing with the winner yet to be announced, but it is known that the utility-scale tariffs have gone as low as INR 2.992/kWh (US$0.045).

As the tariffs breached the US$5 cents mark for the first time ever in India and later went below 3 rupees, analysts announced that even thermal energy will now have trouble competing with these prices.

It is important to note that the tariffs in this case include an escalation of INR 0.05/kWh per annum for 15 years, but prices have plummeted to such an extent on this occasion that heads will be turned across India’s entire power system – not to mention the heads of solar advocates across the globe.

Rajnesh Trivedi, senior director, sustainable investment banking at Yes Bank, told PV Tech that there are several financial reasons for the bids being able to go so low.

Firstly, since the previous lowest utility-scale solar bid from Finnish firm Fortum at INR 4.34/kWh13 months ago, the loans tenor has gone up, meaning that banks today can give loans up to 19 years.

Secondly, interest rates have fallen further over the last 18 months to around 9.5%.

Thirdly, as has been well documented, module prices have decline 28-30% during this period, although there has been a slight correction in module prices of late.

Other reasons unique to the Rewa project include an 18-month development period, so developers can put in advance orders for modules and bank on module prices decreasing further in the interim period.

Trivedi added: “There is a guarantee which is available from Solar Energy Corporation of India (SECI), which basically means that the risk is totally protected. Secondly, there is a further upside in terms of transmission – also for evacuation – if there are any issues; the government is going to give you a protection.”

“All these bids are happening on certain calculations, which are clearly demonstrated in the market […], but going below 3.50 rupees is surely a price which nobody had anticipated.”


The first round of bidding on Wednesday had already set the tone for breaking records, with several players Sembcorp, Softbank and Solenergi putting in bids that were around the same levels that analysts had forecast to be the final prices. Meanwhile a total of 18 companies were still in the running, so it was inevitable that prices would go even lower in the final round.

Tim Buckley, director of energy finance studies, Australasia, Institute of Energy Economics and Financial Analysis (IEEFA) told PV Tech: “This is transformational and it’s a bit like the Fortum news a year ago. At the time everyone [doubted] it and said look, INR 4.34/kWh can’t be replicated; it’s not commercial; it’s not viable; it won’t be repeated.”




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The solar PV plants in India are entering a phase of maturity. The total installations will exceed 2 GW by the end of the year, and about half of them would have completed more than 1 year of operations by that time. As the plant becomes older, Operation and Maintenance (O&M) becomes more and more important for improving the performance of the plant.

In this article, some of the important aspects of O&M are highlighted. A few challenges related to them and some solutions are suggested.

Types of Maintenance
Like in any power plant, a solar PV plant requires the following types of maintenance

  • Preventive Maintenance (PM) which includes routine inspection and servicing of equipment which help prevent breakdowns and reduce energy yield losses.  PM is usually a scheduled activity.
  • Corrective Maintenance(CM) or breakdown Maintenance(BM)  includes repair of broken down equipment and is usually reactive.
  • Condition-Based Monitoring(CBM)involves monitoring of equipment condition and plant operations on a real-time basis and addresses a potential problem at a very early stage to prevent downtime. This requires a robust plant performance monitoring system.

O&M focus areas

A solar PV power plant has several components and each of the sub-system requires different O&M skillsets. A few of the sub-systems and their O&M requirements are mentioned below.

While the PV module does not have any moving parts, the yield from the module is highly dependent on the cleaning of the panels. In the dusty environments of Rajasthan and Gujarat, the cleaning frequency has to be quite high.

Electrical sub-systems
Inverter is the most complicated component of the PV plant and can be called the heart of the system. Since Inverters are predominantly electronics devices, they need to be taken very high care due to the extreme hot, humid and dusty conditions of India. World over, the system downtime is very closely correlated to the inverter downtimes. In fact, in a study conducted in 2010 by US based Electric Power Research Institute, the number of breakdowns is the highest by inverters.

From the above graph, it can be noticed that most of the energy losses happen due to the AC Sub-systems. Apart from this, it is also important to periodically check the wiring(using visual inspection and if possible, using infrared scanners). In India, rodents are known to cause damages to the underground cables and it is important to monitor this regularly. Earthing protection also needs to be checked often.

Civil and Structural sub-systems
One of the tasks of the O&M personnel will be make sure that the growth of shrubs and other vegetation are fully in control. If not, they will grow very tall and will cause shadowing effect on the panels. Snakes and other poisonous reptiles might make these shrubs their home and can cause safety hazard to the workers.

The other problems relate to the mounting structures. In some cases, bending of the structures can happen due to the improper design. If left unaddressed, the bending can damage the modules.
Similarly, during rainy season, it has been observed that the top soil gets washed away due to improper drainage system. Caving of the foundation and the structures caused by improper compaction of the ground has also been observed.  A pro-active O&M team can address this by visual inspection and take preventive action especially before rains.

Most of the solar power plants are located in remote places with unreliable communication infrastructure. Most of the remote monitoring systems need an internet connection and in the absence of a reliable connection, there could be problems of lack of data logging for long periods of time. This makes it very difficult to diagnose and rectify problems in a timely manner.

Warranty Management
The O&M personnel should have a very clear understanding of the warranty terms from the suppliers.  They also need to know the type of defects or problems that are covered under warranty, the duration of the warranty and also the key personnel from the supplier with whom warranty claims can be taken up and enforced in a timely manner.

Spare Parts Inventory Management
The inventory management is critical because this could increase or decrease the cost of the O&M as well as the working capital requirement. It is also essential for the timely completion of the different types of maintenance. The O&M personnel should know very clearly the list of the spare parts available, their quantity at the site warehouse and the lead times for delivery of spare parts from the suppliers.


In our experience in India so far, we have come across some of the problems which are very severe.

  • O&M budget – Typically, the O&M budgets are very limited for various reasons.
  • Availability of water – Dust accumulation in India is very high and requires frequent cleaning. However, most of the plants are located in arid regions with very little availability of water.
  • Skilled manpower – Since the O&M involves people who have the skills in electrical and electronics engineering, it is a challenging task to get people to move to such remote locations to work.
  • Local labour – In many places, it is mandated that local villagers need to be employed for O&M. While this is a noble objective and also is important for the economic development of local communities, in some cases the locals form unions and demand wages that make the O&M cost to go very high.
  • Theft – Theft of materials (even PV panels) is rampant in some parts of the country. This can be prevented by having a good security system and a good inventory management system.
  • Documentation – In many plants, there is no robust remote monitoring system. Instead they have a basic SCADA system which provides real-time information, but does not log the events, alarms and other maintenance issues. In such cases, there is very little documentation which can help the O&M personnel to identify, diagnose and trace the problems.


The importance of O&M is often overlooked by many developers. Considering the fact that the plant has to generate returns over a period of 25 years, a good O&M contractor, a good monitoring system and above all, a very good O&M process is very critical for the success of the plant.

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Asia's largest solar power station, the Gujarat Solar Park, in Gujarat, India

Solar energy sector more popular than wind energy

The increased focus on solar energy and recent policy changes, such as withdrawal of certain tax benefits in wind energy, could impact new investments in the latter and hamper India’s chances of achieving the target of 60 gigawatts (GW) of wind energy capacity by 2022, according to companies and analysts.

India has set itself the target of achieving 100GW of solar energy and 60GW of wind capacity by 2022. It currently has 27GW of wind and about 8GW of solar capacity installed. The country is adding solar capacity at its fastest pace and is attracting interest from global renewable energy firms, pension funds and sovereign wealth funds. In 2015-16, for instance, it added over 3GW of solar capacity and 3.3GW of wind energy. The previous year, it added 1.1GW of solar capacity and 2.3GW of wind.

“In our opinion, the increased focus on solar power has had a negative impact on wind power as the latter struggles for funding and policy support,” ICICI Securities Ltd analysts Prakash Gaurav Goel and Apoorva Bahadur wrote in an 8 August report.

India’s wind energy sector faces several challenges this fiscal, according to analysts and executives in wind energy companies. The government has proposed to end generation-based incentives (GBI) for independent power producers (IPPs) and reduce the accelerated depreciation (AD) benefits to 40% from the current 80%; it is also looking to move to a new system of reverse bidding for certain wind energy projects versus the current feed-in-tariff mechanism.

In a reverse auction, the role of buyer and seller is reversed and a business bid is won by an entity quoting the lowest price. Feed-in tariffs effectively compensate generators of wind and solar power by setting a price per unit that covers their cost and guarantees a certain rate of return.

A third problem comes by way of goods and services tax (GST) which, when implemented, will push up costs for both wind and solar project developers as some tax exemptions are likely to go away.

ALSO READ | GST to push costs up by 10-15% for renewable power companies

Taken together, these may hurt the internal rate of return (IRR) for investors and deter new investments. The reduction in tax sops, together with hike in duties and taxes can have an adverse impact on the equipment manufacturers and wind installations, brokerage firm CD Equisearch Pvt. Ltd said in a 30 May report.

Meanwhile, the cause of solar energy has been helped by a sharp fall in equipment costs.

Over the past five years, wind turbine generator (WTG) costs have fallen about 20% while those of solar modules have fallen by about 80%. This has, in part, helped solar tariffs to fall to a record-low of Rs.4.34 per kilowatt-hour (kWh) in January from around Rs.17 per kWh in 2010. This could mean a better IRR for solar energy projects. The IRR is used to measure the attractiveness of a project.

Solar is receiving preferential treatment from both investors and the policy-making community due to its higher capacity growth potential compared to a more mature wind energy market, said Jasmeet Khurana, associate director at renewable-energy-focused consultancy Bridge to India.

Expectedly, clean energy companies, which were predominantly focused on wind, are now entering the solar energy market. These include CLP India Pvt. Ltd, ReNew Power Ventures Pvt. Ltd, Ostro Energy Pvt. Ltd, and Mytrah Energy (India) Ltd.

India’s largest wind turbine maker Suzlon Energy Ltd also entered the solar energy market earlier this year. Investors, such as Finnish utility Fortum Oyj, Dutch pension fund APG Asset Management, Canadian pension fund Caisse de dépôt et placement du Québec (CPDQ), Japan’s SoftBank Group Corp., Italy’s Enel Green Power, and French utility EDF SA have announced significant investment commitments in India’s solar sector in the past year alone.

“It’s just that in terms of size of the market, solar energy is growing much faster year-on-year; a lot of wind capacity has already been installed. The good sites are already taken, and some wind projects are facing other issues, in terms of payment delays. For example, the state of Maharashtra has not signed power purchase agreements,” said Khurana.

The central government has also recently announced awarding 1GW of wind power projects connected to the Central Transmission Utility under reverse auctions in a bid to ease transmission of wind power to non-windy states. Only eight states in India are suitable for wind power projects —Gujarat, Karnataka, Maharashtra, Andhra Pradesh, Tamil Nadu, Rajasthan, Madhya Pradesh and Telangana. Almost all of India’s 29 states are conducive for solar projects.

“…solar energy is growing much faster year-on-year; a lot of wind capacity has already been installed. The good sites are already taken, and some wind projects are facing other issues, in terms of payment delays”
– Jasmeet Khurana, associate director at Bridge to India
“Our channel checks on various key wind states suggest fair amount of challenge for wind developers from timely payment to denial of PPAs (power purchase agreements) to power back-down,” Goel and Bahadur of ICICI Securities wrote.

Because there are significant variations in the amount of wind power generated, grids usually reserve the right to unplug them. This practice, called power back-down, leads to losses of billions of units of green power.

Both sources of power have their place, said a spokesperson for Suzlon Energy, India’s largest wind power company. The company estimates the wind energy sector will grow 30% this year and expects an annual increase of capacity by 5 GW by 2018-19.

“Both sources are not in competition but are complementary to each other; the real competition to renewables is coal,” the Suzlon spokesperson said in an email response.

The spokesperson added that unlike in the past, today the sector is driven mostly by independent power producers rather than investors solely focused on the accelerated depreciation benefit.

To boost wind sector’s growth, the central government has also announced a re-powering policy, which aims to replace old wind turbines with new, high-performing ones. Suzlon said it is the custodian of about 30% or 850 MW of wind assets out of the 3000 MW identified by Ministry of New and Renewable Energy (MNRE) for re-powering, which would lead to higher plant load factors (PLFs) and ultimately higher returns.

Still, at least some companies are having to choose between the two, said an executive at a renewable energy company.

“Solar is flavour of the season right now,” said Ravi Seth, chief financial officer at ReNew Power, which has over 1 GW of operational renewable energy projects. “It’s not as if the focus on wind is going down, but the way solar bids are happening, obviously everybody is very focused on that sector; there’s so much capacity coming on line. And therefore, for any company, it becomes a capital allocation issue,” said Seth.

According to Anubhav Gupta, analyst with Maybank Kim Eng Securities, wind energy currently is more profitable than solar due to lower capital costs and prevailing incentives. “Wind offers IRRs of 15-20% compared with 10-14% in solar… Solar will always add capacities at a higher rate because of the higher volume targeted in solar,” he said.


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One of the oldest scientific mysteries of the plant world as to what makes the sunflower track the sun has finally been resolved. This finding has major implications for effective tapping of solar energy. The name sunflower invariably invokes a smile, the bright yellow petals with a contrasting black at the center somehow gives the impression of a smiley the universal emoji on social media.

But to scientists the enigma was how do young buds of the plant track the sun and to what benefit. Sun is the ultimate energy bank for earth and recently the first ‘solar tree’, a solar power generation contraption resembling a tree was inaugurated by Science Minister Harsh Vardhan.

This is part of the current government’s target of ramping up solar energy to generate 100 gigawatts in the next 6 years. It has been always known that sunflower heads follow the sun, a phenomenon called heliotropism in the jargon of scientists. But till now how exactly it happens was unresolved. Now a team six American scientists working at the top notch University of California has found that it is the selective growth of the stem in one direction that makes the sunflower follow the sun. The American team studying the plant has published an elegant paper in the SCIENCE journal last week explaining in detail how this unusual plant phenomenon works and what are its evolutionary advantages to the plant.

The team reports that in the morning the head or the flower plant which is the flower will invariably face east and then it tracks the sun and at night the head re-orients itself by growing in the opposite direction so that once again in the morning the flower faces the sun. This daily rhythm is followed only by the new flowers, once they mature and seeds have been set, the flowers lock themselves in a permanent east facing outlook.

The team reports that young sunflowers track the sun as it moves from east to west because of daily or a circadian rhythm. What’s more, mature sunflowers cease this cycle and face eastward because this behaviour offers an evolutionary advantage with pollinators. While the east-to-west behaviour of maturing sunflowers is well known, the exact mechanism underlying it – be it circadian rhythm or changing osmotic pressure – has been a longstanding mystery.

In a statement, Hagop S Atamian from the University of California at Davies and the lead author who studied the common sunflower, whose botanical name is Helianthus annuus, disrupting its exposure to both sunlight and LED lights. For example, when moved to a growth chamber with constant overhead lighting, the plants maintained their directional rhythms for several days before the pattern deteriorated, suggesting that the plants were relying on a schedule dictated by circadian rhythm.

In maturing sunflowers, the researchers found that cessation of the east-to-west sun-tracking behaviour directly correlated with stem cell growth; in the same way, mutant plants with impaired growth hormones also demonstrated impaired sun-tracking behaviour. In studies, sunflower seedlings were found to respond more strongly to unilateral light in the morning than in the afternoon; the authors suggest that this sensitivity to sunlight from the east causes the plants to eventually shift to face east permanently.

The researchers also grew sunflowers in pots and rotated half of the plants to face west just as the sun was rising. The east-facing half of the potted plants was found to have warmer temperatures than its west-facing counterparts, and was also more likely to attract pollinators. When west-facing sunflowers were warmed with portable heaters, they were more likely to attract pollinators than west-facing sunflowers without artificial warming.

The results show how temperature contributes to the differential attractiveness of east- and west-facing sunflowers to pollinators, the authors report. There are many learnings from this simple piece of research, it cost the authors almost nothing since most of the work was of an observational nature, simply designed experiments has led to resolving a long standing mystery. It is amazing that none of the Indian scientists thought on these lines to conduct experiments that needed only very minimum resources but lead to a big understanding.

By tracking the sun, the sunflower some studies suggest is able to produce 10 per cent more oil simply, similarly the ‘solar tree’ installed at Vardhan’s house is able to tap more sunlight to generate more electricity even though the solar panel are stationary in the current model. The ‘solar power tree’ developed by the science ministry harnesses solar energy for producing electricity with an innovative vertical arrangement of solar cells.

Almost akin to the architecture of a tree, with central trunk and solar panels acting like large leaves. It thus reduces the requirement of land as compared to conventional solar photovoltaic layout, on one hand, while  keeping the land character intact on the other. Even the cultivable land can be utilised for solar energy harnessing along with farming at the same time. The innovation finds its viability both in rural and urban areas.

Vardhan noted that in order to produce one megawatt of solar power, it requires about 1.4 hectares of land in the conventional sequential layout of solar panels. Thus, to generate copious quantities of green energy, there will be requirement of thousands of hectares of land. Acquisition of land is a major issue in itself, he added.

Girish Sahni, Director General of the Council of Scientific and Industrial Research (CSIR), says as a future prospect, the ‘solar power tree’ would be developed in a rotatable module, which would have a motorised mechanism to align itself with the movement of the sun during the day. Hence, it would be possible to harness more power over and above the current capacity.


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Of course you’d like to choose the highest quality solar panels for your plant . So shouldn’t your installer be selected with the good level of care, you can count on ADLER solar installer to provide the highest standard of quality and customer service when it comes to installation of your solar panels.  You can rely on ADLER Solar dealer to handle all aspects of your solar panel installation for solar power plant, including design, permitting, rebate processing and system maintenance.  setup solar power plant in delhi NCR,setup solar power plant in gurgaon NCR,setup solar power plant in noida NCR,low cost best solar power plant solutions in delhi ncr,


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The heart of a photovoltaic solar system is the solar array.

Made up of multiple panels, this array absorbs the energy of sunlight and converts this energy into electrical energy.

The array is mounted on a frame of the roof, which provides the correct aspect and elevation for the array so that the maximum amount of available sunlight is received and converted into electricity.


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ADLER Solar is an integrated independent solar power developer, delivering affordable, rapidly deployable and sustainable source of clean energy India delhi gurgaon ncr noida. The company has many MW of solar power plants in operation.

At ADLER SOLAR, we believe there is no better investment than solar energy. Let us help you discover how going solar can benefit you. Contact Us Today
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ADLER Solar’s customers benefit from our progressive system innovations. Around the world, we meet our customers’ desire for the greatest possible reliability, long-term performance and aesthetic integration. No matter which kind of roof – we always have the right solution.

 ADLER Solar is a leading solar company dealing in solar products, solar power plant installations and providing complete solar energy solutions.You’ve came to the right place – give us a call!
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At ADLER Solar , we guarantee maximum quality from raw material to complete solar systems. In our panel testing laboratories, products and materials undergo meticulous and detailed inspections that exceed international standards. Our proven quality guarantees our customers decades of high performance and the security that comes with investing in a reliable product. Our quality is the best buy in the long run.

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Over many years, we have worked to earn a high level of trust from our partners and customers. Time and again, our customers confirm their basic faith in our products and services. We nurture trusting customer relationships in India


Solar energy contributes to the fair provision of energy, because in many areas photovoltaics is the cornerstone of sustainable and fair economic development. As a company, it’s an area in which we have always felt a shared sense of responsibility.


 ADLER Solar is a leading solar company dealing in solar products, solar power plant installations and providing complete solar energy solutions.You’ve came to the right place – give us a call!
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