Korean Solar Groups File Constitutional Complaint on Grid Data
Climate Solutions and the Korea National Photovoltaic Power Association filed a constitutional complaint on October 15, 2026, against the Korean government. They argue the government's 7-year failure to establish specific grid connection information disclosure standards, mandated by the Electricity Business Act Article 20-2, violates developers' rights and causes significant investment risk for solar projects.
Our take
Will a constitutional complaint make Korea publish the grid connection data solar developers need?
It may, but nothing changes until the Constitutional Court rules or the ministry writes the missing disclosure rule first, so for now grid connection risk for new solar in Korea is a project-by-project diligence item, not something investors can read from published data.
On the ministry's side: capacity data is already published through KEPCO ON, and the September plan for power grid innovation adds hosting capacity, so connection itself is getting easier in many areas. On the developers' side: what the data does not show, queue position and the curtailment terms that apply after connection, is what decides project revenue, and the ministry's response does not commit to publishing it. The deciding factor is whether the ministry issues the disclosure rule on its own or waits for the court; no timetable for either is published.
What the source says
- Electricity Business Act Article 20-2, which mandates disclosure of electricity facility capacity and usage, was established in 2019, but specific sub-regulations for disclosure criteria and methods have not been prepared for 7 years.
- Solar developers incur pre-investment costs ranging from tens of millions of won to billions of won for site acquisition and permitting before receiving definitive grid connection terms.
- Korea National Photovoltaic Power Association The Korea National Photovoltaic Power Association states that the current system leads to investment capital being stranded and developers facing bankruptcy due to the inability to know grid capacity changes during the months or years of permitting.
- Korea National Photovoltaic Power Association The association points to a 'blame game' where local governments deny permits without KEPCO's connection confirmation, while KEPCO refuses connection applications without a permit, creating a deadlock for small and medium-sized developers.
- Climate Solutions Climate Solutions clarified that the constitutional complaint aims for the government to create legal information disclosure standards to allow project feasibility and risk assessment, not to guarantee connection or profit.
- Ministry of Climate, Energy and Environment The Ministry of Climate, Energy and Environment plans to increase distribution line connection capacity from 14MW to 16MW and transformer capacity from 50MW to 60MW.
- Ministry of Climate, Energy and Environment The government aims to secure approximately 20GW of additional grid absorption capacity by 2030 by reflecting actual grid operation methods in connection review standards, and stably accommodate over 100GW of renewable energy by 2030.
- Ministry of Climate, Energy and Environment On October 1, 2026, the designation of 164 grid management substations in the Honam region was lifted, allowing existing waiting projects to apply for early connection, following the 'Power Grid Innovation Measures' announced on September 29, 2026.
- Ministry of Climate, Energy and Environment The Ministry of Climate, Energy and Environment states that KEPCO ON provides grid capacity information, updated quarterly for transmission grids (7-year outlook, application volumes, breaker status) and daily for distribution grids (substation, transformer, line capacity, connection plans).
- Korea National Photovoltaic Power Association The Korea National Photovoltaic Power Association demands that disclosed information include exact remaining connection capacity per facility, anonymized waiting project counts and total capacity, queue numbers, and substation/line expansion plans with completion targets, as well as past and expected curtailment history per connection point.
For investors — Solar and wind developers: Treat published capacity figures as a screen, not a commitment. The binding answer comes only after permitting and a formal connection application, so stage land and permitting spend with that gap in mind.
Lenders and buyers of permitted projects: A generation permit is not evidence of a connection date. Ask for the agreed connection timing, and for flexible connection projects, the curtailment conditions that apply until the grid is reinforced.
Watch: A decision by the Constitutional Court of Korea regarding the constitutional complaint, or the issuance of specific sub-regulations by the Ministry of Climate, Energy and Environment for Electricity Business Act Article 20-2.
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