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					</table><p>Retail and wholesale businesses with substantial daytime electricity consumption can use rooftop solar to offset grid power purchases during operating hours. Stores with lighting, cooling, ventilation, and other daytime electrical loads can consume solar power as it is generated, reducing their electricity bills.</p>
<p>Ratna Store, a clothing and uniform retailer and wholesaler in Kollam, Kerala, has installed a 20 kW rooftop solar system to reduce its electricity expenses. High power bills were the main reason the business switched to solar.</p>
<p><a href="https://wattsun.in/" target="_blank" rel="noopener">Wattsun Energy India</a> installed the rooftop system.</p>
<p>Before the installation, Ratna Store consumed about 70 kWh to 100 kWh of electricity per day, or about 2,100 kWh to 3,000 kWh per month.</p>
<p>The solar system is expected to reduce the store&#8217;s electricity expenses by approximately ₹16,000 (~$166) to ₹20,000 (~$208)/month, resulting in annual savings of ₹192,000 (~$2,000) to ₹240,000 (~$2,500).</p>
<p>Based on the estimated savings, the project is expected to recover its investment in approximately 3.3 to 4.2 years.</p>
<p>The system uses Reliance heterojunction technology (HJT) solar modules and Sungrow inverters. Wattsun used continuous long-rail mounting structures along with fiber-reinforced polymer (FRP) walkways.</p>
<p>The wide roof span presented alignment and access challenges during installation. Wattsun used the continuous long-rail mounting structures to maintain alignment and distribute loads evenly across the rooftop.</p>
<p>The FRP walkways provide maintenance access across the rooftop while adding relatively little structural load. Their non-conductive and corrosion-resistant properties also make them suitable for rooftop electrical installations. The design lets cables run beneath the system and gives maintenance personnel dedicated access without stressing the solar modules.</p>
<p>&#8220;By pairing custom long-rail mounting with lightweight, non-conductive FRP walkways, our engineering team delivered a seamless 20 kW installation that prioritizes long-term structural safety, effortless maintenance, and maximum solar yield,&#8221; said Terance Alex, Founder &amp; CEO at Wattsun Energy India.</p>
<p>Wattsun had <a href="https://www.mercomindia.com/kerala-apartment-complex-targets-lower-power-bills-with-rooftop-solar/" target="_blank" rel="noopener">recently</a> installed a 20 kW rooftop solar system at Vintage View, a residential apartment complex in Thiruvananthapuram, Kerala, to reduce its electricity bills.</p>
<p>To raise awareness about the benefits of solar projects, Mercom India has been hosting a pan-India C&amp;I Clean Energy Meet series, bringing renewable energy developers and commercial and industrial power consumers together to discuss clean energy adoption. The next event in the series will be held in <a href="https://www.mercomindia.com/event/c-and-i-clean-energy-meet-2026-vizag" target="_blank" rel="noopener">Visakhapatnam</a> on September 24, 2026.</p>


Kerala Clothing Wholesaler Adopts Rooftop Solar to Lower Power Bills


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					</table><p>Residential rooftop systems have been driving India’s rooftop solar capacity additions, especially after the introduction of the PM Surya Ghar: Muft Bijli Yojana in 2024. Over 5 million households have benefited from the program so far.</p>
<p>According to Mercom&#8217;s <a href="https://www.mercomindia.com/product/rooftop-solar-market-report-q2-2026" target="_blank" rel="noopener">Q2 and 1H 2026 India Rooftop Solar Market Report</a>, residential installations accounted for 84% of the total rooftop solar additions in the country during the second quarter of the calendar year 2026,</p>
<p>Apartment complexes are increasingly turning to rooftop solar to  lower common area electricity expenses, limit exposure to rising grid tariffs, and meet a part of their daytime power requirements through on-site generation.</p>
<p>Common loads such as lifts, water pumps, lighting, security systems, swimming pools, and other shared facilities can make residential complexes suitable for rooftop solar installations, particularly where adequate roof space is available.</p>
<p><a href="https://www.ppdindia.com/projects/vintage-view-luxury-flats-kowdiar-trivandrum/" target="_blank" rel="noopener">Vintage View</a>, a residential apartment complex in Thiruvananthapuram, Kerala, has installed a 20 kW rooftop solar system to reduce its electricity bills.</p>
<p><a href="https://www.wattsun.in/" target="_blank" rel="noopener">Wattsun Energy India</a> installed the solar system. According to the installer, high electricity bills were the primary reason for adopting rooftop solar.</p>
<p>Before the solar installation, the property consumed approximately 75 kWh to 100 kWh of electricity per day. Monthly consumption ranged from around 2,200 kWh to 3,000 kWh, corresponding to annual electricity consumption of approximately 27,000 kWh to 36,000 kWh.</p>
<p>The rooftop installation is expected to generate approximately 2,400 kWh of electricity per month.</p>
<p>Based on Wattsun&#8217;s estimates, the installation could result in electricity bill savings of ₹19,200 (~$202) to ₹24,000 (~$252) per month. Annual savings are estimated at approximately ₹230,000 (~$2,415) to ₹288,000 (~$3,024).</p>
<p>The installer expects the investment to achieve full payback for the apartment complex within 3.5 to four years.</p>
<p>The project uses Adani Solar modules rated above 550 W and a Sungrow inverter. The modules have been installed on a galvanized steel mounting structure.</p>
<p>Limited rooftop space and shade from surrounding obstructions were among the main challenges that the Wattsun team faced while executing the project. Wattsun designed an elevated mounting structure to improve solar exposure while allowing the area underneath the installation to remain usable.</p>
<p>The company also used a non-invasive anchoring system for the structure. Wattsun handled coordination with the distribution company for net metering and grid approvals.</p>
<p>&#8220;Our experience combined with our zest for innovation helps us develop solar solutions that stand the test of time. We are committed to delivering top-tier quality using tier-1 components to ensure optimal performance, maximum energy savings, and a swift return on investment for our clients,&#8221; said Terance Alex, Founder and CEO of Wattsun Energy.</p>
<p>Last October, Wattsun Energy <a href="https://www.mercomindia.com/cyberpark-kozhikode-300-kw-solar-project/" target="_blank" rel="noopener">executed</a> a 300 kW rooftop solar system at the Cyberpark in Kozhikode, Kerala, to advance its sustainability goals and make productive use of parking and shaded areas.</p>
<p>To raise awareness about the benefits of solar projects, Mercom India hosts a pan-India C&amp;I Clean Energy Meet series, bringing renewable energy developers and commercial and industrial power consumers together to discuss clean energy adoption. The next event in the series will be held in <a href="https://www.mercomindia.com/event/c-and-i-clean-energy-meet-2026-vizag" target="_blank" rel="noopener">Visakhapatnam</a> on September 24, 2026.</p>


Kerala Apartment Complex Targets Lower Power Bills with Rooftop Solar


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					</table><p><a href="https://www.lifecarehll.com/" target="_blank" rel="noopener">HLL Lifecare</a>, a government-owned healthcare products manufacturer, has installed a 1 MW rooftop solar system at its premises in Thiruvananthapuram, Kerala, reinforcing its commitment to sustainability while reducing power costs.</p>
<p>The project, executed by <a href="https://wattsun.in/" target="_blank" rel="noopener">Wattsun Energy</a>, uses Rayzon 540 Wp mono PERC solar modules and Sungrow 125 kW string inverters. For HLL, the primary motivation to go solar was a combination of reducing energy costs and reinforcing their commitment to sustainability.</p>
<p>The project not only promises significant long-term energy savings but also aligns with the organization’s vision of adopting greener practices and lowering its carbon footprint.</p>
<p>Before the project, HLL Lifecare had an average daily energy consumption of about 29,062 units. With the solar system now operational, the company expects to save nearly ₹10 million annually (~$113,545), with a payback period of just five years.</p>
<p>Installation posed several challenges. One of the main challenges was dealing with multiple roof types on one of the city’s oldest buildings. To address this, Wattsun adopted specially designed raised mounting structures that offered above-average elevation, ensuring uniformity and stability across varying roof conditions. This unique design approach allowed the company to overcome structural complexities while optimizing module placement for maximum generation.</p>
<p>“HLL solar project stands out as an example of switching to solar isn’t just about saving the planet—it’s about powering your business with lower costs, higher efficiency, and a competitive edge that shines brighter every day,” said Terance Alex, Founder and CEO at WattSun Energy.</p>
<p>Commercial and industrial (C&amp;I) entities, large institutions, and residential apartment buildings are all seeking clean energy solutions at a lower cost than traditional grid power tariffs. Rooftop solar, being the most cost-effective and environmentally friendly energy source, presents an attractive option for C&amp;I businesses aiming to reduce their operating expenses.</p>
<p>Mercom India hosts a multicity ‘C&amp;I Clean Energy Meet’ series designed to provide C&amp;I energy buyers with the knowledge and tools they need to adopt clean energy solutions and lower their power costs. The next Clean Energy Meet event will be held in <a href="https://www.mercomindia.com/event/c-and-i-clean-energy-meet-2025-jaipur" target="_blank" rel="noopener">Jaipur</a> on September 19, 2025.</p>


HLL Lifecare Installs 1 MW Rooftop Solar to Cut Costs and Boost Sustainability

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