Professor urges Korea to revise public investment rules for railway energy hubs
Park Young, Head of Electrical Systems Engineering at Hanbat National University, proposes that Korea adopt a "Railway Energy Hub" model and revise public investment criteria to unlock the energy potential of its railway infrastructure.
Our take
Is there a private investment route into solar and storage on Korea's railway infrastructure?
Private capital can reach Korean railway energy only through solar site leases for now, because larger hub projects stall on who pays and on screening that counts only electricity bill savings, a professor argues.
The agency that funds upgrades and the operators that save on bills keep separate books, so the same project can pass or fail depending on whose accounts are used. The deciding step is whether ministries set investment shares and operating rules, including any private role, which are not published.
What the source says
- Ministry of Land, Infrastructure and Transport The Ministry of Land, Infrastructure and Transport announced on September 14, 2025, its plan to expand the utilization of solar PV on railway idle land.
- The Public Institution K-RE100, launched in February 2026, made renewable energy performance a management evaluation item for public institutions.
- Korea Railroad Corporation (KORAIL) Korea Railroad Corporation established an RE100 Promotion Team under its CEO in August 2025 and began standardizing bidirectional metering and regenerative power settlement.
- Park Young proposes a 'Railway Energy Hub' model where solar PV on station roofs and trackside land, along with surplus regenerative power from braking trains, is stored and used for station loads first, then transferred to depots at night.
- Park Young suggests that the Railway Energy Hub could also function as emergency power for platform lighting and communication during wide-area blackouts.
- Park Young notes that Korea's railway energy initiatives are currently in the testing phase, unlike commercial operations in France and Japan.
- The economic viability of railway energy projects changes depending on whether the investment is accounted for by Korea National Railway (facility improvement) or Korea Railroad Corporation/other operators (electricity bill savings).
- The public institution renewable energy installation mandate applies only to new, expanded, or renovated buildings exceeding 1,000 sqm, excluding the replacement of old substation equipment with the same capacity.
- Park Young argues that current investment screening criteria are insufficient, as they only consider electricity bill savings as benefits, omitting deferred benefits from peak load reduction, basic fee savings, and the value of maintaining essential facilities during blackouts.
- Park Young recommends that the Ministry of Land, Infrastructure and Transport, Ministry of Trade, Industry and Energy, Korea National Railway, Korea Railroad Corporation, and Korea Electric Power Corporation define overall responsibility, investment sharing, and operating principles.
For investors — Solar developers should treat railway sites as lease opportunities and should not model self-supply or storage revenue until investment shares are set.
Infrastructure funds should watch whether pilot sites enter the next facility improvement plan, since an allocated budget would show who carries the investment.
Watch: Monitoring for any government announcements or pilot project initiatives that establish clear investment responsibilities, benefit-sharing mechanisms, or revised public investment screening criteria for railway DER.
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