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Advancing solar PV integration: A vision for a sustainable energy future

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During the Eng. (Prof.) R. H. Paul Memorial Oration 2025, Prof. Lilantha Samaranayake emphasised the urgent need for advanced solar photovoltaic (PV) integration to create a resilient and sustainable energy future. Speaking on the Future of Renewable Energy, he highlighted projections from the International Energy Agency (IEA) that forecast global renewable electricity generation will exceed 17,000 TWh by 2030, representing an almost 90% increase from 2023. Solar PV is anticipated to become the leading source of renewable electricity, followed by wind and hydroelectric power.

Sri Lanka has set an ambitious target of achieving 100% renewable energy. Policymakers are working towards a people-centric, equitable, and affordable energy transition. The government also aims to reduce electricity tariffs by 30% within five years, though no specific timeline has been set for net-zero emissions.

Challenges in Solar PV Integration—While renewable energy adoption is increasing, challenges remain. A major issue is grid stability due to solar energy’s intermittent nature. Grid stability refers to the ability of an electrical power grid to maintain a consistent voltage and frequency while balancing electricity supply and demand. One of the main challenges with integrating solar energy into the grid is its intermittent nature, meaning that solar power generation fluctuates depending on sunlight availability. This variability can cause instability in the grid.

Why is Solar Energy Intermittent? Solar panels generate electricity only when exposed to sunlight. At night, there is no generation, requiring alternative power sources. Cloud cover, rain, and seasonal changes affect solar energy output. On cloudy days, solar generation can drop suddenly, causing fluctuations in power supply. Unlike conventional power plants that provide a steady output, solar energy can vary within minutes, making it challenging to maintain a stable power flow.

How Does This Affect Grid Stability? The Electricity grids operate at a specific frequency (e.g., 50 Hz or 60 Hz). A sudden drop in solar power generation can lead to a decrease in frequency, potentially causing power outages. Solar energy injections can cause voltage levels to rise or drop unpredictably, affecting equipment performance and consumer supply quality. Traditional power plants have rotating generators that provide inertia, helping to stabilise the grid. Solar PV systems do not have this natural inertia, making the grid more susceptible to instability.

Prof. Samaranayake explained that Sri Lanka’s current power generation mix, as of November 2024, includes:

27% from hydroelectric power

19.6% from rooftop solar

14.3% from coal

13.6% from oil

5.1% from private oil plants

Smaller contributions from wind, biomass, and other renewable sources

A key concern is the lack of inertia in renewable energy sources. Unlike conventional power plants, solar and wind do not provide inherent grid stability, leading to frequency fluctuations.

Prof. Samaranayake proposed an innovative solution for grid stability: implementing Virtual Inertia using advanced power electronic control systems. This approach mimics the stabilising effect of traditional rotating generators, ensuring a steady frequency supply in the grid.

Other potential solutions include:

Adding rotating machines such as LNG or nuclear power plants

Energy storage systems like pumped storage, flywheels, and large-scale battery systems

Enhancing grid regulations to support the integration of rooftop solar PV systems

The introduction of advanced Virtual Inertia technology is expected to complement regulatory changes that relax statutory voltage limits and improve the quality of electricity supply.

Another controversial yet forward-looking strategy discussed was the possibility of nuclear energy. According to sources from the Sri Lanka Atomic Energy Board (SLAEB), the country’s first nuclear power plant, leveraging integral pressurized water reactor (iPWR) technology, could be operational by 2032. Given Sri Lanka’s proximity to India, which already operates nuclear plants, proponents argue that nuclear energy could be a viable option for stabilizing the power grid.

Prof. Samaranayake stressed the need for a holistic approach, as solar PV continues to be vital to Sri Lanka’s energy future. This involves investing in energy storage, enhancing grid infrastructure, and enacting regulatory reforms. He called on policymakers, engineers, and the public to collaborate in creating a more sustainable and resilient energy landscape.

The Eng. (Prof.) R. H. Paul Memorial Oration reminds us of engineering and innovation’s critical role in tackling global energy challenges. With strategic planning and technological advancements, Sri Lanka can pave the way for a cleaner, more sustainable future.

The oration paid tribute to the late Prof. R. H. Paul, a distinguished academic and former Dean of the Faculty of Engineering, University of Peradeniya, who made significant contributions to electrical and electronic engineering in Sri Lanka. His legacy continues to inspire advancements in the energy sector.



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Cargills adopts Crow Island Beach in partnership with Clean Ocean Force Lanka

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Cargills Food and Beverage Ltd. through its brands KIST and Knuckles, has signed a Memorandum of Understanding (MoU) with Clean Ocean Force Lanka (COF) to adopt Crow Island Beach for one year, reinforcing its commitment to long-term coastal conservation in Sri Lanka.

This pioneering initiative is designed to protect and preserve the coastal environment through several key measures, including the removal of plastic and other pollutants from the beach and surrounding coastal area. As part of the adoption programme, the beach will be maintained daily with the support of dedicated beach caretakers, while also supporting their livelihoods by providing meaningful income opportunities.

Marking the partnership and in celebration of World Recycling Day, a coastal clean-up programme was conducted at Crow Island Beach to remove plastic and other manmade pollutants. Volunteers from Cargills, Clean Ocean Force Lanka, the Interact Club of Colombo, the Colombo Municipal Council and the Women’s Force of COF Negombo (Sri Vimukthi Association) participated in the clean-up with support from the Marine Environment Protection Authority (MEPA), the Sri Lanka Police Environmental Division and the Ministry of Local Government and Environment as well as the Crow Island Beach Park Society.

Jerome Fernando, Chairman & Co-founder of Clean Ocean Force Lanka said that, “Marine & Coast Conservation demands a unified front. Our unique Public-Private-People Partnership model is the cornerstone of our mission, and today, we are thrilled to welcome Cargills (Ceylon) PLC as a vital partner in this journey adopting the Crow Island Beach for the next one year. This collaboration will not only amplify our efforts to eliminate plastic and manmade pollutants from our beaches, but also reinforce our commitment to empowering marginalized communities through sustainable livelihood opportunities. Cargills’ deep-rooted dedication to environmental sustainability and community wellbeing perfectly aligns with our vision.”

Jagath Gunasekara, General Manager of MEPA added, “The Marine Environment Protection Authority consistently promotes active private sector engagement in marine and coastal conservation, as well as pollution control initiatives. This approach aligns closely with our Beach Caretaker Programme. We are pleased to collaborate with Cargills (Ceylon) PLC in the adoption of Crow Island Beach through our long-standing partnership with Clean Ocean Force Lanka.”

During the event, Knuckles also launched Sri Lanka’s first tethered bottle cap, introducing a packaging innovation aimed at improving plastic waste management and supporting recycling efforts. The tethered cap is designed to remain attached to the bottle after opening, reducing the likelihood of caps being discarded separately. Bottle caps are among the most commonly littered plastic items globally and frequently enter landfills and waterways due to their small size and low collection rates.

Speaking on the initiative, Arjuna Kumarasinghe, Managing Director of Cargills Food & Beverage Ltd., said, “Cargills has always believed in taking responsibility for the communities and environments around us. By adopting Crow Island Beach, we’re able to work closely with our partners and local volunteers to protect this part of our coastline. Launching the tethered bottle cap is another way we’re addressing plastic waste and making recycling easier for everyone.”

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CBSL adopts cautious stance in the face of economic uncertainties

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Dr. Nandalal Weerasinghe; focus on inflation stabilization

The Central Bank is keeping its overnight policy rates unchanged, adopting a cautious stance amid uncertainty over the inflationary impact of energy prices due to the Middle East crisis.

‘We maintained the overnight policy rate at 7.75 percent, considering low inflation and a restrained approach on the fallout of the US-Israeli war on Iran, Central Bank Governor Dr Nandalal Weerasinghe said.

The Governor made these remarks yesterday at a press briefing held at the Central Bank head office in Colombo to announce the monthly monetary policy stance.

Dr Weerasinghe added: ‘Inflation is now expected to reach the Central Bank’s target of 5 percent in the second quarter of 2026, after Sri Lanka raised fuel prices by about 35 percent this month.

‘However, spillovers from the ongoing conflict could weigh on domestic economic activity in the period ahead should the conflict be prolonged.

‘The rates were steady since last May as the nation recovers from a 2022 financial crisis driven by a severe dollar shortage.

‘Supported by a US$ 2.9 billion programme with the IMF, Sri Lanka posted a strong economic recovery last year, growing by 5 percent and now targeting growth between 4 percent and 5 per cent in 2026.

‘What stands out is that they see space for inflation to rise because of energy prices but still stay contained.

‘From now to June, underlying economic momentum has the space to keep pace despite the disruption because domestic liquidity and credit has been quite substantial as well.

‘An IMF team will arrive in Colombo on Friday for the combined fifth and sixth reviews of the bailout.

‘Furthermore, Gross Official Reserves increased to US$ 7.3 billion at end February 2026 and the Central Bank purchased a substantial amount of foreign exchange from the market in the first two months of the year.

‘However, the ongoing conflict in the Middle East poses risks to Sri Lanka’s external sector outlook, particularly through energy, tourism, trade and remittance flows, although the overall magnitude of the impact remains uncertain.

‘While the Sri Lanka rupee remained relatively stable in early 2026, some depreciation pressures were observed following the onset of the Middle East conflict, similar to the exchange rates of regional peers.

‘Meanwhile, the Monetary Policy Board remains prepared to implement appropriate policy measures to ensure that inflation stabilizes around the target, while supporting the economy to reach its potential.’

By Hiran H Senewiratne

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Dialog Unveils Dialog Play Mini with Netflix and Apple TV

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Dialog Television, Sri Lanka’s #1 Pay-TV service provider, has announced the latest upgrade to its smart entertainment lineup with the Dialog Play Mini, featuring seamless access to global streaming platforms including Netflix, Apple TV and YouTube, alongside the Dialog Play entertainment ecosystem for a unified viewing experience. Previously known as the ViU Mini, the device has now been reintroduced as the Dialog Play Mini, reflecting the evolution of Dialog’s digital entertainment platform under the Dialog Play brand.

The Dialog Play Mini transforms any television into a smart 4K entertainment hub by enabling hybrid multi-platform streaming across leading global and local content platforms, delivering a smoother, more intuitive viewing experience. Whether enjoying Netflix originals, Apple TV exclusives, or local favorites, households can now experience world-class entertainment in one compact device.

The Dialog Play Mini brings a streamlined, user-friendly experience to any home setup. Its single numeric-keypad remote controls both the TV and the device, offering simplicity and convenience for everyday viewing. With multiple connectivity options including Wi-Fi, hotspot, LAN, or wingle, the device ensures uninterrupted entertainment even in areas without smart TVs or advanced broadband setups.

Bridging the gap between entry-level set-top boxes and premium Android TV devices, the Dialog Play Mini offers a plug-and-play smart experience. Supported by Dialog’s nationwide service network, local warranty, and after-sales care, it delivers a reliable, feature-rich entertainment experience for Sri Lankan homes.

“With Dialog Play Mini, entertainment becomes more directly accessible for every Sri Lankan home – with or without a Smart TV,” said Lim Li San, Group Chief Operating Officer of Dialog Axiata PLC. “By bringing Netflix, Apple TV, YouTube, and Dialog Play together in one compact 4K-ready device, we’re redefining home entertainment through simplicity, innovation, and the power of connectivity.”

The Dialog Play Mini is now available at Dialog Experience Centers and authorized retailers islandwide. To purchase online, please visit

https://dialog.lk/dialog-play-mini

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