SEOUL - South Korean solar energy is entering a new phase. After years of rapid capacity expansion, the industry is now prioritizing structural quality and sustainability over the sheer speed of growth, marking a fundamental shift in how the country approaches its renewable energy transition.
Annual solar installations in 2026 are projected to reach approximately 4 GW, a figure largely unchanged from 2025. Yet industry observers say this plateau is not a sign of stagnation but rather evidence of a maturing market where the rules of the game are being rewritten.
From RECs to Auctions: A Policy Overhaul
The biggest change occurring is that South Korea's Renewable Portfolio Standard (RPS) is being phased out. The RPS has governed the solar markets in Korea for nearly six years. Under the current RPS framework, large producers of electricity are required to produce a certain percentage of their total production from renewable sources or purchase Renewable Energy Certificates (RECs).
From 2017 to 2025, the Korea Energy Agency (KEA), through its fixed-price contract bidding program, has awarded a total of 14.81 GW of solar capacity and has selected 10.64 GW of that to be implemented.
That system is now giving way to a government-led auction model. Legislation to replace the RPS with capacity-based government auctions has cleared South Korea's Climate, Energy, Environment and Labor Committee and is awaiting a plenary National Assembly vote. Under the proposed overhaul of the Renewable Energy Act, new projects would be required to enter exclusively through government-run auctions from 2027, with the REC spot market closed to new entrants that year and abolished entirely by 2029.
The first-half 2026 solar fixed-price contract tender-expected to open in early June with results due by late July-may be the final procurement round under the existing RPS framework. For developers, this represents a last opportunity to lock in 20-year stable revenue under the familiar REC-based structure. From 2027 onward, the market will place greater emphasis on project revenue stability, bidding competitiveness, and developer financial health.
Carbon Scoring Reshapes Competition
Perhaps the most telling indicator of the industry's new direction is the introduction of carbon emissions assessment for solar modules in the 2026 tender. For the first time, projects can receive up to 20 points based on the carbon footprint of the modules they use, with lower-emission modules earning higher scores. Modules with carbon emissions of 630 kg CO₂/kW or less will receive the highest rating, while those exceeding 710 kg CO₂/kW will receive the lowest.
The bidding price weighting has gone from 90 to 70 points, with 20-point carbon score filling the gap between the two. This rebalance sends the message to bidders that environmental performance is now an important factor in making procurement decisions after the lowest bid.
The desire to move toward more sustainable practices therefore goes beyond tenders and procurement only; also, the government of South Korean has expanded tax incentives for low-carbon technology in the photovoltaic (PV) manufacturing sector with investment tax credits for production facilities that produce less than 655 kg of CO₂ generated per kilowatt hour of energy produced beginning in April 2026. This policy includes all levels of the PV manufacturing supply chain and is indicative of a comprehensive approach taken by the South Korean government to decarbonize PV and the solar industry from end-to-end, starting very early in the development cycle.
Electricity as Risk, Not Expense
The market's evolving mindset is perhaps best captured in how companies and public institutions now view electricity. Rather than treating power as an expense to be minimized, they increasingly see it as a long-term risk to be managed. This perceptual shift is driving a broader transformation: the market is moving from a supply logic centered on power generators to a choice logic centered on electricity consumers.
This consumer-centric orientation is already visible in new business models. H Energy's "SolarShare Baro" platform, for example, allows businesses to buy electricity directly to meet RE100 goals, installing and operating solar facilities on corporate rooftops with no upfront investment required and delivering power at approximately 28% less than Korea Electric Power Corp. Meanwhile, the government is investing KRW 321 billion ($222.6 million) in 2026 to upgrade regional distribution networks, deploy 85 energy storage systems, and pilot microgrids and market reforms.
Community Solar Projects, Agrivoltaics and Integrated Solar-Storage Systems are all ways that Distributed Solar is becoming one of our fastest growing Development paths. A great example of this is the "Sunlight Income Village" Project, where local residents join together to create Co-operatives that own and operate Solar Farms on their Vacant Land.
The Cost Challenge
While recent developments have led to improvements in the renewable energy sector, there continues to be obstacles to overcome. For instance, the cost of producing solar energy in South Korea is still over twice as expensive than the worldwide average. The cost of levelized electricity (LCOE) generated from solar energy in 2024 was estimated to be R115-R136/kwH ($0.076-$0.090), while the world average for LCOE was approximately $45/mWh. The price difference in producing solar energy can be attributed primarily to the high cost of land for solar plants, delays associated with long permitting processes, opposition by locals toward renewable energy projects, restrictions on connecting to the electrical grid and conditions associated with financing.
Today, the domestic markets for solar modules and inverters are priced at approximately two times more than equivalent products manufactured in China, and the market share of South Korean produced solar modules has decreased from 70% in 2020 to approximately 30%, primarily because of low-cost imports from China. The Korea Energy Agency has proposed several options to overcome these barriers; these include providing more stable revenues to solar developers, establishing clearer regulations and increased government purchasing of Korean built solar equipment.
The government has established a goal of reducing the cost of generating solar energy by approximately 50% within the next decade (R150 to R80/kwH) by 2035. Accomplishing this goal will necessitate the combination of significant amounts of capital being invested, obtaining land at reduced costs, obtaining financing rates lower than those currently available and producing solar generated electricity on a larger scale by means of public projects and purchasing domestic manufactured solar equipment via bulk-buying agreements.
A New Trajectory
South Korea's solar industry stands at a crossroads. The 4 GW expected in 2026 represents a pause for reflection rather than a retreat. As the country works toward its goal of 100 GW of renewable energy capacity by 2030-up from approximately 29.5 GW of solar at the end of 2024-the focus is shifting from how much can be built to how well it can be built.
The transition from RPS to auctions, the introduction of carbon scoring, the rise of consumer choice, and the push for cost competitiveness all point to a more sophisticated, more sustainable solar market. In this new phase, structural quality and sustainability are not just aspirations-they are becoming the currency of competition.
