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					</table><p>High-power string inverters can significantly reduce the balance of system (BOS) costs compared to central inverter solutions as they require fewer inverters per block and have a better DC-to-AC conversion ratio, a panel of industry experts at a webinar hosted by Mercom India said.</p>
<p>The impact of inverters on project performance, stability, and the levelized cost of energy (LCOE) is substantial.</p>
<p>The webinar, titled &#8220;<strong>How to Save Costs with High Power String Inverters in Large Scale Projects,&#8221;</strong> highlighted how high-capacity string inverters could help save costs for large-scale solar projects.</p>
<p>The panelists were Nilesh Mahajan, CEO and Director of <a href="https://roofsol.com/" target="_blank" rel="noopener">Roofsol Energy</a>; Yogish HN, AVP-BD at <a href="https://enerparc.in/" target="_blank" rel="noopener">Enerparc</a>; Kannan Devaraji, Senior Manager at Enerparc; Gajanan Sawant, Senior Manager – Design and Engineering at <a href="https://www.cleanmax.com/" target="_blank" rel="noopener">Cleanmax</a>; Sunil Panigrahi, Country Manager – India at <a href="https://en.hopewind.com/" target="_blank" rel="noopener">Hopewind</a> and Rakesh B P, Solution Manager at Hopewind.</p>
<p>Priya Sanjay, Managing Director, Mercom India, moderated the session.</p>
<p><strong>Cost Savings</strong></p>
<p>As high-power string technology requires fewer inverters per block, the costs associated with cabling, combiner boxes, junction boxes, mounting structures, and other electrical equipment are reduced. This brings down installation, operations, and maintenance expenses over the project&#8217;s lifecycle.</p>
<p>&#8220;We have calculated that using high-power string inverters in large-scale projects can save around $8,000 to $9,000 per MW in costs,&#8221; said Panigrahi . &#8220;For a 100 MW project, the savings become really substantial when you multiply across the entire capacity.&#8221;</p>
<p>&#8220;On the DC side, you can reduce the number of cables, and on the AC side, you can reduce the cable size. By this, you can reduce the project cost,&#8221; he added.</p>
<p>Apart from reduction in capital costs, developers also look at savings in LCOE over the life of the inverter, explained Nilesh Mahajan. &#8220;At the end of the day, we also want to see how the inverter will perform. Apart from capital costs, developers and EPC contractors also look at the costs associated with the inverters after installation, during maintenance, and the lifespan of the inverters and the critical components that need to be replaced.&#8221;</p>
<p><strong>Better Conversion Ratios</strong></p>
<p>Another key advantage highlighted was the higher AC/DC conversion ratios achievable with string inverters. &#8220;This higher DC overloading allows capturing more energy from the solar modules and accounts for any mismatch losses or degradation over time,&#8221; explained Rakesh.</p>
<p>Distributed string inverter configurations also provide more design flexibility than centralized solutions. If a fault occurs in one string, the entire plant is not shut down, unlike a central inverter.</p>
<p><strong>Flexibility in OEMs</strong></p>
<p>The introduction of high-power string inverters also offers increased flexibility when using various original equipment manufacturers (OEMs). Implementing high-power string inverters allows for the integration of multiple module technologies and ratings, providing developers and EPC firms greater flexibility.</p>
<p>&#8220;By introducing high power inverters, we have the flexibility to use different OEM and different technology because module costs are one of the deciding factors in the system as well as BOS costs,&#8221; said Kannan Devaraji.</p>
<p>Earlier conventional solar setups with a single central inverter could utilize only a single OEM of modules, limiting options when it came to costs and supply timelines.</p>
<p>&#8220;The cost and supply of a module also plays a role in overall costs,&#8221; added Devaraji.</p>
<p><strong>Technological Challenges</strong></p>
<p>However, string inverters also face technology challenges that need to be addressed. A major concern was derating, especially for hot, arid regions like Rajasthan, where temperatures routinely exceed 50°C. Developers stressed the need for more intelligent cooling systems.</p>
<p>&#8220;One of the major criteria before selecting an inverter is how it performs in extreme temperatures, along with reliability and safety aspects,&#8221; said Mahajan. &#8220;Certification is another aspect we look for. Since the projects are connected to the grid, we have to comply with the requirements of the grid operator,&#8221; he added.</p>
<p>Another requirement is faster response time to support dynamic reactive power requirements for large plants. Gajanan Sawant felt that under one-second response time is needed to provide grid services like frequency regulation, as opposed to about five seconds currently.</p>
<p>Highlighting the advantage of string inverters when it comes to response time, Rakesh explained that a lower number of inverters usually leads to faster response time. &#8220;When you connect a lower number of inverters, the response time is faster.&#8221;</p>
<p>Cyber security to safeguard the distributed assets from potential hacking was another area of focus for the panelists. They felt that inverters must have advanced security measures, certifications, and secure servers to prevent any data breaches or manipulation attacks.</p>
<p>Later this month, Mercom will host a <a href="https://www.mercomindia.com/webinars/how-to-protect-renewable-energy-projects-from-commercial-cyber-threats-with-insurance" target="_blank" rel="noopener">webinar</a> on how insurance can help protect renewable energy projects from commercial cybersecurity attacks.</p>
<p>Last year, Mercom <a href="https://www.mercomindia.com/smarter-inverters-crucial-from-advanced-solar-modules" target="_blank" rel="noopener">hosted</a> a webinar exploring the rising demand for high-capacity string inverters and larger solar modules with a power rating of 600W+. The webinar found that the shift to larger modules had prompted upgrades in project designs and other equipment to accommodate higher generation.</p>
<p><strong>Sign up for Mercom&#8217;s next webinar on &#8211;</strong> <a href="https://www.mercomindia.com/webinars/how-to-protect-renewable-energy-projects-from-commercial-cyber-threats-with-insurance" target="_blank" rel="noopener">How to Protect Renewable Energy Projects from Commercial Cyber Threats with Insurance</a></p>


High Power String Inverters in Solar Projects Perform Better, Save Costs


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					</table><p>Given the benefits of easy installation and swapping, higher efficiency, and cost-effectiveness, high-power string inverters are increasingly being used in large-scale solar power projects across the world.</p>
<p>Due to their small size, they can be easily installed and quickly swapped in case of faults. Like central inverters, they are highly efficient in terms of DC to AC conversion.</p>
<p>These inverters are also known to reduce equipment costs and installation expenses for BOS components while enhancing monitoring and control capabilities.</p>
<p>Mercom&#8217;s Webinar &#8216;<a href="https://www.mercomindia.com/webinars/how-to-save-on-costs-with-high-power-string-inverters-in-large-scale-solar-projects" target="_blank" rel="noopener">How to Save on Costs with High-Power String Inverters in Large-Scale Solar Projects</a>&#8216; will explore projects where these inverters are a prudent choice over smaller models and central inverters.</p>
<p>The panel of experts will also discuss how the costs could be reduced during construction and the lifetime of the project with the use of high-power string inverters.</p>
<p>The panelists are Nilesh Mahajan, CEO and Director of <a href="https://roofsol.com/" target="_blank" rel="noopener">Roofsol Energy</a>; Yogish HN, AVP-BD at <a href="https://enerparc.in/" target="_blank" rel="noopener">Enerparc</a>; Gajanan Sawant, Senior Manager – Design and Engineering at <a href="https://www.cleanmax.com/" target="_blank" rel="noopener">Cleanmax</a>; Sunil Panigrahi, Country Manager – India at <a href="https://en.hopewind.com/" target="_blank" rel="noopener">Hopewind</a> and Rakesh B P, Solution Manager at Hopewind.</p>
<p>Priya Sanjay, Managing Director at Mercom India, will moderate the session.</p>
<p>The webinar is scheduled for March 12, 2024, at 03:00 PM IST. Viewers can register for the webinar <a href="https://www.mercomindia.com/webinars/how-to-save-on-costs-with-high-power-string-inverters-in-large-scale-solar-projects" target="_blank" rel="noopener">here</a>.</p>
<p>Utility-scale solar projects demand simplified grid integration for ease of operation. High-power string inverters with multi-channel maximum power point tracking (MPPT) design help to effectively reduce module mismatch, increase system power generation, and help lower the levelized cost of energy.</p>
<p>Mercom India&#8217;s recent webinar in December 2023, titled &#8220;Optimal Sizing of PV Inverters for Robust Performance in High Ambient Temperatures,&#8221; saw industry experts <a href="https://www.mercomindia.com/lcoe-primary-driver-choosing-right-solar-inverter-size" target="_blank" rel="noopener">discussing</a> the factors involved in optimally sizing solar photovoltaic inverters for diverse locations and temperatures and achieving higher performance.</p>


Exploring Benefits of High-Power String Inverters


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					</table><p>Chhattisgarh, which has traditionally relied on coal sources for its energy requirements, has recently seen a surge in solar capacity additions, accounting for about 5% of the 13.6 GW installed capacity in the state as of September 2023.</p>
<p>The state has witnessed a dramatic increase in open access solar from 3 MW in the second quarter (Q2) of 2023 to 28 MW in Q3 2023, according to <a href="https://www.mercomindia.com/product/q3-2023-mercom-india-solar-open-access-market-report" target="_blank" rel="noopener">Q3 2023 Mercom India Solar Open Access Market Report</a>.</p>
<p>By the end of September 2023, Chhattisgarh&#8217;s cumulative open access solar capacity reached 380.7 MW, making it the ninth highest in the country, accounting for 3.5% of the country’s total.</p>
<p>The state&#8217;s recent policy adjustments, particularly certain exemptions for open access, have decisively boosted Chhattisgarh&#8217;s overall solar capacity.</p>
<p>The Chhattisgarh State Electricity Regulatory Commission (<a href="https://cserc.gov.in/" target="_blank" rel="noopener">CSERC</a>) <a href="https://www.mercomindia.com/distributed-solar-projects-chhattisgarh-exempted-transmission-charges" target="_blank" rel="noopener">amended</a> the Grid-Interactive Distributed Renewable Energy Sources Regulations 2019 to provide financial incentives for the development of open access solar projects.</p>
<p>The amendments exempt the first 500 MW of such projects from transmission, wheeling, state load dispatch center (SLDC) charges, and the cross-subsidy surcharge for the entirety of their operational life.</p>
<p>This exemption was applicable to projects that achieved commercial operation by December 27, 2023.</p>
<p><strong>Policy Reboot Driving Renewables</strong></p>
<p>The exemptions granted on surcharge accelerated solar capacity additions under open access.</p>
<p>Ashish Verma, Vice President of Business Development at <a href="https://www.gensol.in/" target="_blank" rel="noopener">Gensol</a>, confirmed the positive impact of the policy changes on the market. “With Chhattisgarh being home to numerous heavy industries, including steel and metal, and the emergence of decarbonization plans, the state is witnessing a positive shift.”</p>
<p>Taking advantage of Chhattisgarh&#8217;s favorable open access policy, developers are actively exploring the state&#8217;s potential for renewable energy projects. According to Mercom India’s research, a 20% quarterly increase in the state&#8217;s open access solar capacity by the end of the fourth quarter of 2023 is likely.</p>
<p>The regulations also aim to democratize access by reducing the minimum power contract requirement from 500 kW to 100 kW, making it possible for even smaller consumers to adopt solar.</p>
<p>Surajit Chanda, AVP of Business Development of <a href="https://www.adityabirlarenewables.com/" target="_blank" rel="noopener">Aditya Birla Renewables</a>, said, “Incentives are pivotal to attracting developers to a state, ensuring savings on the project cost. Karnataka&#8217;s success with similar measures five years ago serves as a testament to the effectiveness of such approaches. The state is experiencing growth, and with increasing confidence in the market, more relaxations are welcome, which will catalyze a boost. Chhattisgarh has had a promising start and is poised to become a prime destination for open access developers to sell power.&#8221;</p>
<p>The state&#8217;s exemptions on open access charges have also prompted commercial and industrial (C&amp;I) customers to consider transitioning to solar through open access models, with the aim of achieving significant cost savings on their energy expenses.</p>
<p>The C&amp;I consumers stand to benefit substantially, with industrial consumers expected to save ₹3.55 ($0.04)/kWh and commercial consumers ₹4.75 ($0.05)/kWh. The state extends exemptions on charges for all open access models, including third-party arrangements.</p>
<p><img loading="lazy" decoding="async" class="aligncenter size-full wp-image-62275" src="https://mercomindia.s3.ap-south-1.amazonaws.com/wp-content/uploads/2024/01/Chhattisgarh-Net-Savings-For-OA-with-Exemption.png" alt="Chhattisgarh Net Savings For OA with Exemption" width="698" height="447" srcset="https://mercomindia.s3.ap-south-1.amazonaws.com/wp-content/uploads/2024/01/Chhattisgarh-Net-Savings-For-OA-with-Exemption.png 698w, https://mercomindia.s3.ap-south-1.amazonaws.com/wp-content/uploads/2024/01/Chhattisgarh-Net-Savings-For-OA-with-Exemption-300x192.png 300w, https://mercomindia.s3.ap-south-1.amazonaws.com/wp-content/uploads/2024/01/Chhattisgarh-Net-Savings-For-OA-with-Exemption-650x415.png 650w, https://mercomindia.s3.ap-south-1.amazonaws.com/wp-content/uploads/2024/01/Chhattisgarh-Net-Savings-For-OA-with-Exemption-624x400.png 624w, https://mercomindia.s3.ap-south-1.amazonaws.com/wp-content/uploads/2024/01/Chhattisgarh-Net-Savings-For-OA-with-Exemption-600x384.png 600w" sizes="(max-width: 698px) 100vw, 698px" /></p>
<p>Chhattisgarh&#8217;s distribution companies (DISCOMs) have also been instrumental in promoting open access projects with their robust energy banking policy.</p>
<p>The energy banking policy includes the provision for annual energy banking, accompanied by a reduction in banking charges from 5% to 2%. Additionally, all open access consumers are now permitted to bank 100% of their surplus energy annually.</p>
<p>Collectively, these measures present an attractive and financially favorable opportunity for both renewable energy developers and consumers.</p>
<p>Operational solar projects in the state and those slated for commissioning in the coming quarters may find benefits in the favorable energy banking policy outlined in the amended regulations.</p>
<p>With the aim of streamlining calculations and improving transparency for intra-state open access participants, CSERC has imposed a 20% ceiling on the cross-subsidy surcharge applicable to open access power consumers, determined by the average power supply cost.</p>
<p>Effective from April 1, 2024, this modification offers stakeholders a more defined and predictable long-term outlook regarding their net landed energy costs.</p>
<p>For projects commissioned after December 2023, the amendments offer long-term visibility by determining cross-subsidy surcharges for twelve years from the project&#8217;s operation date.</p>
<p><strong>Current Challenges</strong></p>
<p>The introduction of the incentives is a response to the historical underutilization of open access markets for renewables in Chhattisgarh. But challenges still remain.</p>
<p>Verma highlighted the unique challenges of the state and why Chhattisgarh had remained a dormant open access market. He said many projects, especially captive ones, received approvals before 2019. However, the onset of the COVID-19 pandemic presented a new dynamic for Chhattisgarh, disrupting planned price structures and rendering them unviable.</p>
<p>“In response, developers adopted a &#8216;wait and watch&#8217; approach, navigating the uncertainties brought about by the pandemic for the state&#8217;s developmental trajectory,&#8221; he said.</p>
<p>Nilesh Mahajan, Director at <a href="https://roofsol.com/" target="_blank" rel="noopener">Roofsol Energy</a>, however, noted that there is currently more momentum for rooftop solar among C&amp;I consumers compared to open access. Mahajan noted that open access projects require a well-established infrastructure, without which developers are likely to encounter challenges in executing projects in this domain.</p>
<p>“We have seen an acceleration in recent years. Earlier, Chhattisgarh was not a good market. I believe the lack of infrastructure is still prominent. For instance, in other states like Maharashtra and Madhya Pradesh, open access is robust. Maharashtra has the highest generating capacity and caters to 20-25 GW of power. But this isn’t the case with Chhattisgarh. There are limitations in its generating capacity in order to ensure that the grid remains stable.”</p>
<p>Verma emphasized the importance of thorough preparation for the anticipated growth in renewables and that DISCOMs need to adapt to the higher percentage of renewables in the system. According to him, managing 1 GW of projects compared to managing a substation, which would support those 1 GW projects, presents a distinctly different challenge.</p>
<p>Rahul Mishra, Sr VP &amp; Head C&amp;I at <a href="https://blupineenergy.com/" target="_blank" rel="noopener">BluPine Energy</a>, said, &#8220;The recent amendments in Chhattisgarh&#8217;s electricity regulations will not significantly impact our solar projects; incentives were expected to be temporary triggers. We foresee continued scalability with the new policy. We believe that the projects in Chhattisgarh will continue to be economically viable, provided that land challenges are successfully managed and that banking provisions for 100% generation are adhered to. There may be short-term impacts, but stability is anticipated.&#8221;</p>
<p>Chanda spoke about another crucial roadblock stemming from the amendment. &#8220;While the initial policy lacked caps on transmission or wheeling charges, rendering the market highly attractive, the amendment introduced a 500 MW cap, causing policy uncertainty and adversely affecting investor confidence.”</p>
<p>Without the exemption of charges on captive and group captive green open access models would result in substantial savings for industrial consumers. While industrial consumers would save ₹3.55 ($0.04)/kWh with the exemption on charges, the savings would fall to ₹2.91 ($0.035)/kWh without the exemptions.</p>
<p>For commercial consumers, savings under the third-party model would fall from ₹4.75 ($0.05)/kWh with exemptions to ₹1.76 ($0.021)/kWh without. Under the captive and group captive model, without the exemption of charges, the savings would still be substantial at ₹4.11 ($0.049)/kWh.</p>
<p><img loading="lazy" decoding="async" class="aligncenter size-full wp-image-62276" src="https://mercomindia.s3.ap-south-1.amazonaws.com/wp-content/uploads/2024/01/Chhattisgarh-Net-Savings-For-OA-without-Exemption.png" alt="Chhattisgarh Net Savings For OA without Exemption" width="693" height="440" srcset="https://mercomindia.s3.ap-south-1.amazonaws.com/wp-content/uploads/2024/01/Chhattisgarh-Net-Savings-For-OA-without-Exemption.png 693w, https://mercomindia.s3.ap-south-1.amazonaws.com/wp-content/uploads/2024/01/Chhattisgarh-Net-Savings-For-OA-without-Exemption-300x190.png 300w, https://mercomindia.s3.ap-south-1.amazonaws.com/wp-content/uploads/2024/01/Chhattisgarh-Net-Savings-For-OA-without-Exemption-650x413.png 650w, https://mercomindia.s3.ap-south-1.amazonaws.com/wp-content/uploads/2024/01/Chhattisgarh-Net-Savings-For-OA-without-Exemption-624x396.png 624w, https://mercomindia.s3.ap-south-1.amazonaws.com/wp-content/uploads/2024/01/Chhattisgarh-Net-Savings-For-OA-without-Exemption-600x381.png 600w" sizes="(max-width: 693px) 100vw, 693px" /></p>
<p>Chanda said this underscores the need for clearer timelines in project planning. Despite concerns expressed in public hearings and applications to the government, the Commission&#8217;s decisions have not been favorable. Stakeholders are advocating for waivers for projects in advanced stages of development, particularly those that have procured materials outside the 500 MW allotted capacity.</p>
<p>According to Mercom sources, there is no further update if the deadline of December 27, 2023 will be extended or if the project capacity cap (500 MW) eligible for exemption will be increased.</p>
<p>While the policy has played a favorable element in boosting the open access capacity in the state, a more simplified and clearer approach to these policies would help the open access market grow further.</p>


Chhattisgarh’s Open Access Solar Projects Surge With Policy Boost


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					</table><p><a href="https://www.tatapowersolar.com/" target="_blank" rel="noopener">Tata Power Solar</a>, <a href="https://amplussolar.com/" target="_blank" rel="noopener">Amplus Solar</a>, <a href="http://www.fourthpartner.co/" target="_blank" rel="noopener">Fourth Partner Energy</a>, <a href="https://roofsol.com/" target="_blank" rel="noopener">Roofsol Energy</a>, and <a href="https://www.havells.com/en/industrial/solar.html" target="_blank" rel="noopener">Havells India</a> were the top solar rooftop companies in India in the first half (1H) of the calendar year (CY) 2022, according to Mercom&#8217;s recently released <a href="https://mercomindia.com/product/mercoms-india-solar-market-leaderboard-1h-2022-market-shares-and-profiles" target="_blank" rel="noopener">India Solar Market Leaderboard 1H 2022</a>.</p>
<p>The report provides insight into the industry leaders&#8217; market share and shipment rankings across the Indian solar supply chain.</p>
<p>The top three companies accounted for 40% of the market share in 1H 2022.</p>
<p style="text-align: center;"><a href="https://mercomindia.com/wp-content/uploads/2022/11/Top-Rooftop-Installers.png"><img loading="lazy" decoding="async" class="alignnone wp-image-45141 size-full" src="https://mercomindia.com/wp-content/uploads/2022/11/Top-Rooftop-Installers.png" alt="Top Rooftop Installers" width="523" height="343" srcset="https://mercomindia.s3.ap-south-1.amazonaws.com/wp-content/uploads/2022/11/Top-Rooftop-Installers.png 523w, https://mercomindia.s3.ap-south-1.amazonaws.com/wp-content/uploads/2022/11/Top-Rooftop-Installers-300x197.png 300w" sizes="(max-width: 523px) 100vw, 523px" /></a></p>
<p>Tata Power Solar has a portfolio of 1.2 GW rooftop and distributed generation projects across the country. It operates a manufacturing unit in Bangalore, with a production capacity of 635 MW of modules and 500 MW of cells. Tata Power Solar tied up with several banks to offer loan facilities to residential consumers and Micro, Small, and Medium Enterprises (MSMEs) to switch to solar solutions</p>
<p>Amplus owns and manages a portfolio of over 1 GW of operational and under-construction distributed solar assets.</p>
<p>Amplus Solar <a href="https://mercomindia.com/mercom-india-solar-awards-2022/" target="_blank" rel="noopener">won</a> the award for the best residential project in Mercom India Awards 2022. The award was accorded to Atrium, a designer edition solar pergola from HomeScape by Amplus Solar.</p>
<p>Fourth Partner Energy has installed over 500 MW of rooftop solar projects for India&#8217;s top businesses and institutions. It has <a href="https://mercomindia.com/british-international-investment-89-million-solar-projects/" target="_blank" rel="noopener">received</a> $47 million as a follow-on investment from British International Investment (BII). Fourth partner, in total, has received $80 million in investments from BII.</p>
<p>Roofsol Energy commissioned a 5 MW rooftop solar system for textile manufacturer ST COTTEX in Ludhiana, Punjab. The system installed under the RESCO model is expected to generate 6.7 million units of electricity in the first year and replace 7,000 tons of greenhouse gases annually.</p>
<p>Tata Power Solar, Fourth Partner Energy, and Amplus Solar were also the <a href="https://mercomindia.com/tata-power-solar-fourth-partner-sunsure-leading-rooftop-solar-2021/" target="_blank" rel="noopener">top</a> solar rooftop companies in India in 2021. Havells India was a top solar engineering, procurement, and construction (EPC) company in 2021.</p>
<p>A complete list of the solar rooftop installers and their market share is available through Mercom&#8217;s <a href="https://mercomindia.com/product/mercoms-india-solar-market-share-tracker/" target="_blank" rel="noopener">India Solar Market Share Tracker</a>.</p>


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