Connect with us

Features

Devoid of preconceptions and bias for and against

Published

on

A Fresh Look at Solar Energy:

By Eng Parakrama Jayasinghe

Parajaysinghe@gmail.com

The earth receives enough solar energy in one hour, adequate to meet the entire energy needs of the world for a year. In this equation Sri Lanka is placed in a most advantageous position being a tropical island with over 200 days of sunshine annually anywhere . Also the intensity of solar radiation as estimated by the NREL and published in the documents of the Sustainable Energy Authority show that the Global Horizontal Irradiation (GHI) is over 1700 kWh/m2 over most of the country, except for some small segment of the hill country. The best areas can boast of over 1750 kWh/m2/year. This relates to a solar PV potential up to 1637 kWh/kWp in the best locations. ( See www.energy.gov.lk) Those who have opted to install roof top solar PV, including me, which are not necessarily the optimal orientation can safely expect the generation to be 110 kWh/kW/month averaged over the year including the cloudy and rainy days.

So Sri Lanka is very well endowed with this bounty of nature!

But with all this energy year round why is solar energy is not being pursued diligently in Sri Lanka?

Even with the projected demand of 30,890 GWh in 2030, the area required, if we want to get this entire energy form the sun is only 390 square kilometers. Which is only 0.60 % of the total land area of the country. The DG of the SLSEA Dr. Asanka Rodrigo has calculated that this area amounts to only 10 % of the scrub lands, reported as 1.6 million ha by the Ministry of lands. But then no one is planning to get all our electricity from solar PV. The current annual electricity demand is 18542 GWH. Suppose we target a contribution of say 25% of this demand, the area requirement of only 53.5 square kilometers or 5350 ha.( Ref Draft LTEGP 2020-2039) Does not sound too daunting does it?

But the inescapable reality is that sun shines only during the day even if we are lucky to get 12 hours of it, the solar insolation varied during the sunshine hours. And there are cloudy days and even a passing cloud would reduce the intensity of energy received.

It is this none firm nature and the diurnal availability which has been the main disadvantage and the barrier for wider exploitation of this unenviable natural resource. Also the cost of solar PV was found prohibitive even 5-10 years ago.

 

Winds ( Solar?) of Change

But all that is in the past. Now solar energy is the cheapest source for power generation except perhaps wind power and major hydro. Solutions have been found to overcome the problem variability and diurnal nature, in many countries.

This is done in two ways, first by accepting the reality of variable nature and system of forecasting the weather patterns and also taking advantage of the wide distribution of the solar systems, particularly the roof top installations. Thus taken as a combined system and not as single installations, present a less formidable picture. Of course the utilities must be clever enough to factor in this diversity.

On the other hand the use of storage devices, particularly storage batteries has solved this problem entirely. The 100 MW battery installed by Tesla in Hornsdale south Australia initiated a revolution. Now other utilities are vying with each other to install larger and larger. That is of course except for Sri Lanka which opts to remain in the last century when it comes to the electricity sector.

But we in Sri Lanka has the largest battery already installed in the shape of major Hydro reservoirs supporting 1399 MW of power generation capacity. All we lack is the courage and are too backwards in our thinking to recognize this asset and its immense value in conjunction with the literally unlimited solar potential and also coupled with the wind resource.

So it is time to consider and how we can use this bounty to the maximum, and not looking for reasons why it cannot be done, when it is already proven it to be technically and commercially feasible.

So let us look at the often stated problems.

Lack of Adequate Land

As already shown we need only 0.6 % of the land area even if we depend 100% on solar in 2030. But a more pragmatic vison indicated that we need only 0.33 % of the land for us to elevate the contribution up to 25% by 2030. But even this extent of lands, need not be targeted as there are other options. What should be our target for 2030, if we are to strive to achieve the President’s goal of 80% RE by 2030? As a viable and eminently achievable target I suggest 5000 MW, which would yield 8760 GWH per year or 28% of the total energy demand of 30890 GWH. How much of this can come from solar roof tops? An estimate of 3000 MW has been suggested as shown below.

Total Number of bill paying consumers 6,350,000 ( CEB own statistics 2018)

Assume 20% would opt for roof top solar 1,250,000 consumers

Tottal Solar Capacity @ 3 kW 3,750 MW

So the land requirement is only for the balance 2000 MW of solar parks or only 109 Sq Km or 10900 ha.

The thousands of reservoirs and lagoons would eminently serve our space requirement for the solar parks, with the added advantage of improved conversion efficiency on one hand, and the reduction of evaporation loss of the reservoir water on the other.

Sri Lanka has 62500 ha of reservoir area and 161,500 ha of lagoons dotted all over the country. So even a significant proportion of the area required, can be considered to come from these water bodies making this question of land availability a storm in a tea cup.

How do we handle variability?

The first option is to live with it however, idiotic that may sound. So as mentioned earlier with adequate number of installations there is a certain fraction of firm power that would be available but of course during the sun shine hours. The engineers at CEB must work out how to handle this to the best advantage, which of course needs thinking big and planning big to consider a little more than the area covered by a distribution transformer. But also we have the advantage of 1340 MW of hydro power which could be kept entirely away from the grid during day time, as well as shutting down the diesel guzzlers for good. In case someone asks the question, recently South Australia managed the entire day time hours with only solar energy as shown below.

Is there any technical reason why we in Sri Lanka cannot do the same thing, perhaps with a battery/batteries only of adequate capacity to iron out the dips to be expected during the day and to manage the night peak as shown below. That’s the challenge we must accept.

 

Where are we now?

It is not all gloom and doom. Over the past few years many things have been moving forward albeit much too slowly for our liking. We have now over 250 MW of grid connected Solar PV roof top installations by about 25,000 consumers and the number is rising. Added to that are over 50 MW of solar parks already connected and hopefully, at least some out of the 300 MW of 1 MW scale solar parks already tendered for should get built.

Sri Lanka can be proud of being most innovative and progressive by the introduction of the net metering system further improved by the three systems under the Surya Bala Sangraamaya. This is the most important shift in policy which led to the exponential growth in the solar PV roof top , which brought in its wake, many more spin off benefits, too many to list here. Therefore Sri Lanka should salute those who had the courage to bring in this legislation, whoever wishes to take credit for it. It is the responsibility of those claiming parentage of this innovation to ensure it is not allowed to be sabotaged as unfortunately some people are trying , including those in authority who fail to appreciate its value and immense potential. It is sad to see propaganda based on entirely incorrect numbers perhaps purposely designed to deceive, being used in this disruptive campaigns.

 

What does the immediate future offer us?

If the present format of the Surya Bala Sangraamaya is allowed to continue as it should, including the tariff structure , a most ambitious and visionary program has been proposed by the State Minister to install 100,000 rooftop solar PV systems targeting the Samurdhi Recipients. The capacity of each is estimated to be about 5-6 kW under the Net Plus scheme. Leveraging on the ADB funded loan scheme and an attractive low interest rate of 4%, this project can be entirely funded by the loan scheme and has the greatest advantage of the loan installment payments being made from the monthly income of exporting the generated energy to the national grid. It is also expected that the consumer will have a surplus in excess of the normal Samurdhi payment he would have otherwise received from the government, which will now not be forthcoming. Once the loan is paid up the consumer will receive a very substantial monthly income way above the Rs 2,500, he would otherwise have received, and would also have the satisfaction of being a contributor to the national energy mix thus joining the growing band of ” Prosumers”

This is indeed a win-win opportunity where by the country will gain at least 500 MW addition to the grid, without any capital expenditure by the treasury and an added saving of Rs 3000 Million every year by offsetting the 100,000 Samurdhi payments. The CEB too will make a saving by the avoidance of equivalent amount of expensive oil based power generation. We only hope that the CEB will proactively work towards ensuring the success of this project without trotting out the usual slogans.

The most tantalizing target is the 1.4 Million Samurdhi recipients who can be up lifted from eternal poverty at no cost to the government.

The State Ministers programme deserves the proactive support of all concerned by removing any road blocks that could appear in implementing this courageous by daunting project.

The CEB must be congratulated for launching a similar innovative project in parallel to clear the way for local investors to implement 10,000 mini solar parks, targeting the 100 kW distribution transformers dotted round the country. A recent Cabinet decision has already approved the project with the identified 7000 transformers that could be used for this scheme. Thus the possibility of adding a further 1000 MW of Solar power to the grid is already on the cards with the blessing of the CEB who are best placed to ensure its success.

 

Therefore if the above two schemes are implemented, not deterred by any minor glitches which should be addressed proactively, Sri Lanka too can play catch me with our neighbours in the race for solar power.

Several other larger solar parks have been in the planning for some time. The 100 MW solar park in Siyambaladuwa is expected to be tendered for soon.

 

The major challenge ahead

Our energy future needs to be “Electrical”. Solar energy paves the way and could also become the most important player by democratising the electrical generation industry. Thus the future generators of the electricity will be the consumers themselves as ” Prosumers”

The most important nationwide impact it the indigenization of the energy industry both the resources as well as the owners and operators of the facilities. This has immense impacts on the balance of payments and long term energy security and in meeting the Sustainable Development Goals.

This note is designed only to highlight the great opportunity awaiting us, only if we have the courage and the vision to exploit same for Sri Lanka. The feasibility of doing so has been proven all over the world, even where the resource is much less pronounced. Do we as professionals accept this challenge to justify our claim for excellence and national service?



Features

Approach to constitutional reform

Published

on

SWRD Bandaranaike

The S.J.V. Chelvanayakam KC Memorial Lecture delivered on 26 April, at Jaffna Central College, by Professor G.L. Peiris, an academic with outstanding credentials, was published, under the title, “Federalism and paths to constitutional reform,” in The Island of 27 April, 2026.

In Part II of the publication, titled “Advocacy of Federalism: Origins and Context,” Professor Peiris states: “At the core of political convictions he held sacrosanct was his unremitting commitment to federalism…”. Contrary to popular belief, however, federalism in our country had its origins in issues which were not connected with ethnicity. At the inception, this had to do with aspirations, not of the Tamils but of the Kandyan Sinhalese. The Kandyan National Assembly, in its representations to the Donoughmore Commission in 1927, declared: “Ours is not a communal claim or a claim for the aggrandizement of a few. It is the claim of a nation to live its own life and realise its own destiny”.

Commenting on S.W.R.D. Bandaranaike’s views, Professor Peiris states: “Soon after his return from Oxford, as a prominent member of the Ceylon National Congress, was an advocate of federalism. He went so far as to characterise federalism as ‘the only solution to our political problems”.

THE COMMON THREAD

The thread that is common to the sources cited above is that while their focus was on the political framework, there is not even a hint as to the territorial units to which the political framework of federalism is to apply. With time the Tamil “nation” claimed that their federal State was to be the Northern and Eastern Provinces of Sri Lanka. However, the Kandyan “nation” was silent on this issue. Since Britain annexed the Kandyan Kingdom and the unified, then Ceylon in 1815, for all intents and purposes it would be reasonable to assume that the claim of the Kandyan “nation” was to be the region under the last Kandyan King, leaving the Western and Southern coastal regions for the Rest of the “nation”.

Chelvanayakam

Sri Lanka, while being a colony under the British, was not interested in political frameworks. Instead, the British were interested in structural arrangements that facilitated Administration. It is evident from the evolutionary processes explored by the British that subdivided units of a State are critical not only for effective Administration but also for the political framework that ensures political stability. Federalism, advocated by the Tamil and Kandyan Leaderships for territorial units, as claimed by them, would inevitably lead to political instability. The lesson to be learnt is not to start with political frameworks, such as Federalism, but to first decide on the territorial units, within which a State functions, to ensure stability, and then frame political aspirations of the People belonging to such a State, in order to ensure political and structural stability.

LESSONS of HISTORY

Material from an article, dated 16 June, 2016

“When the British took control of the Dutch possessions in former Sri Lanka, in 1796, the Kandyan Kingdom was independent and separate from the Maritime region. The Kandyan Kingdom consisted of the “central highlands with the eastern and southeastern coastal strips”. It was after ceding of the Kingdom, at the Kandyan Convention of 1815, and after the rebellion of 1817-1818, that the two regions were merged. However, despite the merger, the administration of the two regions remained divorced from each other, with the Kandyan region being divided into 11 Districts, and the Maritime region into five, creating a total of 16 Districts for the administration of the whole country (Sir Charles Collins, Public Administration of Ceylon, 1951, p. 49).

“The above arrangements continued until the recommendations of the Colebrook – Cameron Commission. In 1832, the recommendations of the Commission were accepted , “… and the separate administrative system for the Kandyan provinces was abolished and amalgamated with the territories on the littoral acquired from the V.O.C. in a single unified administration structure for the whole island. The existing provincial boundaries within the two administrative divisions – the Kandyan and maritime provinces – were redrawn, and a new set of five provincial units, of which only one – the Central Province – was Kandyan pure and simple, was established. The new provincial boundaries cut across the traditional divisions and placed many Kandyan regions under the administrative control of the old maritime provinces” (K.M.de Silva, A History of Sri Lanka, 1981, p. 263), continued until as late as 1889, resulting in nine Provinces for the sole purpose of facilitating the Colonial administration. In point of fact, the Province never functioned as the administrative unit. Instead, the administrative unit was essentially the District, and the situation has remained so throughout the Colonial period and into this day. According to Sir Charles Collins cited above: “Most provinces were divided into districts, each Government Agent having charge of his own district, with general supervision over the whole province. The districts not in the direct charge of Government Agents were under the control of assistant Government Agents”. (Ibid, p. 62.)

PRIORITISING POLITICS OVER STABILITY

The lesson learnt by the British was that if a Colony is to be Administered effectively, the Colonizer had to choose the most appropriate unit of administration. Similarly, to an Independent Sovereign State, Territorial Stability should be its foremost priority. This means deciding on the most structurally secure territorial unit within which political power sharing should operate and not prioritise political frameworks, such as Federalism, at the expense of the structural stability of the State. Political instability would have been inevitable had Sri Lanka succumbed to pressures from the Tamil and Kandyan Leaderships.

Although Britain was not concerned with territorial stability, they recognised that the District was the most effective unit for effective administration. In fact, the 1977 Constitution describes the Territory of Sri Lanka in terms of Administrative Districts. Despite this, it was the Indo-Lanka Accord that first recognised the Northern and Eastern Provinces as political units. Following this, the 13th Amendment of 1987 extended this recognition to all Provinces.

The adoption of the Province as the political unit may not have had an impact on the territorial integrity of the Sri Lanka State, except for the Northern and Eastern Provinces, judging from the events that followed over three-plus brutal decades. The transformation of the territory of Sri Lanka, from Administrative Districts to Provinces and Provincial Councils, is the direct result of prioritising politics over territorial stability. For India to be the handmaiden of this transformation is beyond comprehension because instability in Sri Lanka, in whatever form, would impact on India’s own territorial integrity. This serious blunder cannot be ignored any further for the sake of both Sri Lanka and India. It is imperative that measures are taken to engage in a course correction through Constitutional Reform.

PROPOSED CONSTITUTIONAL REFORMS

The path to Constitutional Reform should start with the territorial subdivision of the Sri Lankan State into Districts, not only to ensure the territorial integrity of the State but also to improve administrative and development efficiencies coupled with Local Government units; a lesson learnt from the British. Any political powers devolved/decentralised to Districts should be the responsibility of District Councils, elected by representatives to Local Governments within each District.

Political power at the Centre should reflect the commitment to a single Sri Lankan Nation, through an elected Legislature, with Executive Powers being shared by a President/Prime Minister, with a Cabinet made up of all communities, in the ratio represented in Parliament. An attempt to share Executive Power with all communities, in an inclusive Cabinet, has not been the practice in the past, and under the present government, as well, despite its strident calls for unity and reconciliation. Consequently, the tendency for minority communities is to seek peripheral power to the maximum extent possible.

CONCLUSION

The approach to Constitutional making has been how best to accommodate political power in the form of Federalism, first by the Kandyan “nation” and later by the Tamil “nation”. The claim by the Tamil Leadership morphed from Federalism to a Separate State resulting in tragedies of an unimaginable order, to the point of threatening the very existence of the Sri Lankan State.

The current arrangement is based on Power being devolved to Provinces, in the form of Provincial Councils, with no regard the Province, makes to the territorial durability of the Sri Lanka State. How successive Governments hope to prevent threats to territorial vulnerabilities is to curtail the operation of sensitive provisions of devolved powers. This is being disingenuous.

On the other hand, the more direct and forthright approach to Constitutional Reform is to make the District the unit of peripheral power in order to ensure territorial stability and effective peripheral development and share Executive Power with communities in the ratio of their representation in the Legislature. The first could be achieved through a referendum and the second by the President/Prime Minister of any government. This approach prioritises territorial stability over political power; a change that has eluded policymakers. Therefore, it is imperative that territorial stability is given the foremost place in Constitutional Reform processes for the sake of not only Sri Lanka but also for India, for reasons of connectivity.

by Neville Ladduwahetty

Continue Reading

Features

Time to get ready to face power

Published

on

The power cuts are already here. Perhaps, even before the date predicted by the Public Utilities Commision of Sri Lanka (PUCSL. The peak load has gone well past the threshold they indicated as the tipping point of 3030 MW of peak load. It is now will past 3100 MW and growing, perhaps triggered by the continued heatwave making the use of air conditioners and fans more frequent and by a wider group of consumers. The government insists there is no intention of power cuts but each of us have experienced some form of power outage, without notice, at some time or other.

It is in this scenario that the Ceylon Electricty Board (CEB), or whatever it is called now, had directed all roof top solar projects, over 300 MW capacity, to shut down for the period 10th April to 20th April.

This is in addition to the curtailment of all ground mounted solar and wind projects, and even mini hydro projects, without compensation, going on for some months.

One year of inaction by CEB with the problem staring in the face

If will be recalled that the same demand was made in April, 2025, after the debacle of the countrywide blackout on 9th February, 2025, whether caused by a monkey or otherwise.

The question to be raised is what steps have been taken by the then CEB, or the Ministry to anticipate the situation this year, too, and to try and mitigate the same.

The easy answer is absolutely nothing. If at all what has been done is unilaterally prevent any further addition of Roof Top Solar PV, under the provisions of the Surya Bala Sangramaya (SBS), is, undoubtedly, the only short term and economical means to add low cost renewable electrical energy to the grid.

The architect of the SBS, the Sustainable Energy Authority is deafening by their silence, when their signature project of prime national importance has been sabotaged, and now even the performance of the already installed systems are being curtailed.

This action is totally unbelievable when the use of expensive oil-based generation will continue unabated, even during the day, when there is so much solar energy already installed. Of course, the age-old excuse will be trotted out, of the non-firm nature of Solar and Wind and problems of grid stability, etc.

Many useful and practical solutions to face the growing issue of how to integrate the essential low cost but variable resources of solar and wind to the grid as an aftermath of the blackout were discussed over a year ago.

But nothing seems to have even been attempted. The most prominent among these was the proposal to add 300 MW of grid scale batteries, as indicated in the already-approved Long Term Electricity Generation Plan ( LTEGP 2024 – 2044,) of which 100 MW should have been in use by 2026. The tender for the addition of 16 X 10 MW battery storage at selected grid substations was called over a year ago. Some expectation of sanity

It is under these circumstances that the PUCSL called for a stakeholder consultation on the 10th April, 2026, after circulating a concept note, which was well attended. It was a breath of fresh air, in view of the downhill slide of the entire electricity sector in the recent months compounded by the raging controversy of the coal scam and the rapidly increased use of expensive diesel, in addition to the other fossil fuels, just to keep up the generation to match the demand. The double whammy of the doubling of the fuel prices , exacerbated the hit on not only the consumer’s monthly bill, but the national economy and balance of payments.

Therefore, it was most encouraging to note from the PUCSL’s concept note that sanity has prevailed at last. We have been demandin–g some concrete strategies and time based targets to rid at least the electricity sector from the use of expensive, polluting fossil fuels, commencing with oil. This is the only means by which the utility could hope to achieve some degree of economic and financial viability. They have continued to burden the consumer and the country by continually jacking up the consumer tariff, while ignoring any prudent means to clean up their Act. As a matter of interest, the CEB’s own data of 2023 shows that it is possible to save some Rs 113 Billion annually by replacing all oil-based generation using renewables. The country could have saved over $ 700 Million in Foreign Exchange and the Consumer Tariff could have been lowered by Rs 7.00 per Unit across all segments of consumers.

Therefore, the PUCSL concept paper out lines, some credible measures to eliminate the use of all of forms of oil for power generation in stages. The three tier of approach, outlined as option 1 to 3, reproduced here, should be commended for adopting a pragmatic approach, with very good chance of success.

Proposed options by PUCSL

(See Options 1 Peak Shaving Approach by 2027 and Option 2: Eliminating 2.06 GWh/day of diesel-based generation)

Considering even the recent past when we achieved a status of zero oil use, as compared to the present sorry status, this is not an extremely difficult task. We will have to substitute Solar PV to bridge the gap of reduced Hydro during dry months.

(See diagram 1)

RE Contribution 69% % Oil Usage 6.2 % No Diesel

(See diagram 2)

In Contrast on 30th March RE Contribution was only -43,5%

and oil use has gone up to -29.59%

However, as outlined in the introductory paragraphs of the concept paper, the driving force to promote this change is the early declaration of appropriately worked out tariffs for installation of storage batteries and delivery of the stored energy to the grid.

With the total lack of progress of proposals in the LTEGP 2025-2044 by the state institutions, it is prudent to assume any future initiatives can only come from private sector participation.

Using the power granted by the recently ratified Electricity Act NO, 36 (As amended) the PUCSL has moved with commendable speed to develop the Feed in Tariff declarations needed to enable the achievement of the above objectives and a further stakeholder consultation was held on the 24th of April when more detailed proposals were put forward.

However, although the responsibility of publishing the tariff remains with the PUCSL, unless the National System Operator ( NSO ), tasked with the planning and implementation of Electricity Sector developments , takes urgent action to implement the desired changes as a highest priority task, nothing will be gained to help the country to get out of this quagmire.

The Consumer Continues to be Burdened.

Further, as the time table proposed by the PUCSL itself indicates, even the first of the options can be implemented only in 2027, with the others following up to the year 2030.

These are very encouraging time targets and the consumers will eagerly await their achievement.

However, the threat of power cuts, as well as continuing increase in consumer tariff to fuel the use of diesel for power generation, is real and current. A further tariff increase of 18% has been demanded by the NSO, on top of the 15% granted on 1st April, 2026.

The Immediate Options Available to Consumers.

a) The CEB now refuses to provide any grid connection for integration of any rooftop solar PV systems under the Surya Bala Sangraamaya.

b) The only way available to the consumers is to install Off grid roof top solar systems with adequate batteries to be none dependent on the grid. Use the grid only during the off peak hours.

c) During most periods of the year, even under cloudy conditions there is some solar generation. To ensure the daily consumption is more than covered by the solar input and any surplus is used to charge the battery, to the level adequate to manage the evening and peak hour demand, the capacity of the solar panels and battery have to be determined.

d) It is to be noted that although only the relatively high-end domestic consumers could find the proposed scheme financially feasible under the present cost regimes, which will improve further when the second tariff increase is announced shortly, to those consuming over 250 Units/Month, their engagement has a sector wise positive implication which is beneficial to all levels of consumers.

e) The scheme will operate in an off grid mode, without exports to the grid at any time. Therefore, they will not contribute to the often voiced worries of over voltage, instability and variability in the national grid.

f) Once the PUCSL announces the required FIT and the NSO or the Distribution Companies institutes the necessary facilities, such as smart meters, such consumers, too, can further assist the grid by export of any excess they generate.

Proposal to Avoid Power Cuts Implementable by Domestic Consumers

There are several drivers which will attract the potential ” Prosumers” to adopt this option without delay.

* The consumer tariff will continue to rise

* Even the former Roof Top Solar Systems, without batteries, does not provide power during the power cuts or blackouts

* At present day prices, the investment is financially feasible, based on the savings of the current level of monthly electricity bill. A substantial bank loan can be comfortably settled from the savings

* Now cooking with electricity is no longer a financial burden but can save one from the cost and danger of LPG shortages and queues

* What you, do based on your economic ability, will be a service to all consumers as the resultant reduction of Peak Demand means the use of Diesel can be gradually reduced and the lower end consumers, too, will benefit.

* You will enhance your green credentials with your own financial benefits.

The overall benefit to the grid and other consumers

If the element of exorbitant cost of diesel-based generation is removed then there is no need for the increase of consumer tariff for all consumers.

What is more important is that trimming the peak load would drastically reduce the need for any power shredding that is happening on the sly now and thereby benefit all consumers,

The summary of Financial Analysis illustrating the viability based on currently available data is given here. This will improve drastically if a further increase in consumer tariff is granted, which appears inevitable. (See Table 01 – The basic data used for this analysis is available on request.)

by Eng Parakrama Jayasinghe

parajayasinghe@gmail.com

Continue Reading

Features

From Coal to Solar: China’s sunken mines power a Green Revolution: Lessons for Sri Lanka

Published

on

A floating solar farm on a coal mining subsidence area in Panji district of Huainan, Anhui province, China, on June 7, 2017. (Image courtesy China Daily)

In a striking symbol of the global energy transition, vast stretches of once-abandoned coal mines in China have been reborn, not as relics of an industrial past, but as shimmering hubs of renewable energy.

What were once scarred landscapes, destabilised by years of mining, and later submerged by landslides and floods, have now been transformed into expansive artificial lakes.

Floating atop these waters are some of the world’s largest solar power installations, quietly generating clean electricity on a massive scale.

Among the most notable are the Fuyang Floating Solar Farm and the Huainan Floating Solar Farm. Together, they represent a remarkable engineering and environmental achievement.

The Fuyang facility boasts an installed capacity of 650 megawatts, producing approximately 700 million kilowatt-hours of electricity annually. Even more impressive, the Huainan project reaches a staggering 1 gigawatt capacity, generating nearly 1.8 billion kilowatt-hours each year. Combined, these floating giants produce enough electricity to power millions of homes without burning a single lump of coal.

A former General Manager of the Ceylon Electricity Board (CEB), a veteran electrical engineer, described the development as “a glimpse into the future of energy systems.”

“What China has demonstrated is not just technological capability, but strategic foresight. Turning environmentally degraded land into clean energy assets is the kind of thinking countries like Sri Lanka must begin to adopt,” he said.

Why solar on water?

Floating solar, or “floatovoltaics,” offers a range of advantages that traditional land-based solar farms cannot easily match.

Water naturally cools solar panels, improving their efficiency by an estimated 10 to 15 percent. In hot climates, this cooling effect can significantly boost electricity generation.

Additionally, the panels reduce water evaporation, a crucial benefit in regions facing water stress. By limiting sunlight penetration, they also help suppress algae growth, improving water quality.

Perhaps, most importantly, floating solar eliminates the need for large tracts of land. In densely populated or agriculture-dependent countries, this is a game changer.

A dual economy: Fish and power

In an innovative twist, some of these floating solar farms incorporate aquaculture beneath the panels. Known as the “fisheries + solar” model, it allows communities to cultivate fish in the shaded waters below, creating a dual-income system, energy production above, food production below.

This integrated approach not only maximises resource use but also supports local livelihoods, blending sustainability with economic resilience.

Environmental dividends

The environmental benefits are substantial. The Fuyang project alone reduces carbon dioxide emissions by an estimated 580,000 tons annually, while the Huainan facility cuts emissions by around 1.6 million tons each year.

Beyond emissions, these projects reclaim landscapes once deemed unusable—areas heavily damaged by coal extraction. In doing so, they rewrite the narrative of industrial decline into one of ecological restoration and innovation.

Sri Lanka: A nation poised for floating solar For Sri Lanka, the implications are profound.

Unlike China’s abandoned coal pits, Sri Lanka possesses thousands of irrigation tanks, reservoirs, and hydropower catchments that could serve as ideal platforms for floating solar. From the ancient tank systems of the dry zone to major reservoirs like Victoria Dam and Randenigala Reservoir, the country holds untapped potential to generate clean electricity without sacrificing precious land.

The country’s reliance on thermal power, particularly during drought periods when hydropower declines—has long been a challenge. Floating solar could provide a stabilising solution, reducing dependence on costly fossil fuels while complementing existing hydroelectric infrastructure.

Energy analysts note that integrating floating solar with hydropower reservoirs can create a hybrid system: solar power during the day, hydropower balancing supply at night. This synergy enhances grid stability and reduces overall generation costs.

The former CEB official stressed the urgency:

“Sri Lanka cannot afford to delay. With rising energy demand and climate pressures, we must explore every viable renewable option. Floating solar on our reservoirs is one of the most practical and scalable solutions available.”

Challenges and the road ahead

However, experts caution that careful planning is essential. Environmental assessments, grid integration, and financing mechanisms must be properly addressed. Community engagement, especially where fisheries are involved—will also be key.

Yet the blueprint already exists.

China’s transformation of submerged coal mines into renewable energy hubs offers more than inspiration—it provides a working model. For Sri Lanka, adapting that model to its own geography could mark a decisive step toward energy independence.

China’s floating solar farms stand today as one of the clearest symbols of a world in transition—from fossil fuels to renewables, from environmental degradation to restoration.

For Sri Lanka, the message is equally clear: the future of energy may not lie on land alone—but on water, where sunlight meets innovation.

If harnessed wisely, Sri Lanka’s  vast network of reservoirs could one day mirror that transformation, turning calm waters into engines of sustainable growth.

by Ifham Nizam

Continue Reading

Trending