Endangered power plants

  • 97%

    • 97% of all power plants in Korea are small and medium-sized with capacity of less than 300kW.
    • Power plants without professional O&M services
  • 49%

    • Power plants lacking post-maintenance due to the modules and bankruptcy of contractors
    • The test results by Germany’s TUV-Rheinland show that approximately 49% of installed modules have issues in the long-term performance guarantee

Types of hidden module defects

  • Damage inside modules

  • Modules with reduced efficiency

  • Burnt-out internal terminals

  • External issues of unknown cause

Technical due diligence is recommended to the following.

  • Those who are concerned about lower energy output
    compared to nearby power plants or expected outcome

  • Those who require an overall diagnosis
    before/after various warranty periods for defects

  • Those who require a system status diagnosis
    before operating a new plant or after acquiring an existing plant


  • Professional manufacturer

    • 20 years’ know-how in solar energy
    • Production and partial repair of solar power modules
    • Operation of professional research facilities and organizations
  • Operation and maintenance (O&M) capability

    • Current maintenance capacity modified to 338.85 MW
    • Accumulated O&M data
    • Actual data-based energy output analysis
  • Visiting service

    • Analysis of past energy output (As is)
    • Estimation of future energy output (To be)
    • Proposal of improvement direction for energy output

Technical due diligence performance

Project name Conclusion date Installation capacity
2012-2015 in all 13 29.2 MW
2016 in all 13 34.2 MW
2017 in all 34 61.2 MW
2018 in all 42 176.3 MW
2019 in all 39 133.6 MW
Total 141 434.5 MW
Central No. 3 Dec. 2019 0.8 MW
Samdeok Dec. 2019 11.5 MW
Wangsin, Gyeongju Oct. 2019 2.0 MW
Chambit No. 1 Oct. 2019 0.9 MW
Pyeongsan Oct. 2019 2.6 MW
Deokwol Oct. 2019 1.3 MW
Central Oct. 2019 4.0 MW
Boseong Oct. 2019 1.0 MW
Hadong Oct. 2019 8.6 MW
Sejong No. 1 & 2 Oct. 2019 1.0 MW
12 locations including Miso Solar Power Sep. 2019 9.3 MW
Muan Solar Power Sep. 2019 2.0 MW
Gwangmyeong Solar Power Sep. 2019 9.0 MW
Solar Field No. 3 Aug. 2019 1.0 MW
Wonha-ri Solar Aug. 2019 1.0 MW
GTC Solar No. 7 Aug. 2019 1.3 MW
Won Solar Power and 8 other locations Aug. 2019 11.9 MW
Haeom Jul. 2019 1.0 MW
Duri Green Jul. 2019 3.0 MW
Power Green Jul. 2019 3.0 MW
Ganggyeong Solar Farm II Jul. 2019 2.0 MW
Solar Story No.5 Jul. 2019 2.0 MW
SD Sunflower Jun. 2019 2.3 MW
Cheonnyeon Dream No. 1, 2 & 3 Jun. 2019 2.4 MW
Howon Solar Power May 2019 1.0 MW
Dak Nong, Vietnam Apr. 2019 4.0 MW
Ganggyeong Solar Farm II Uljin No. 2 & Samcheok No. 3 Apr. 2019 1.0 MW
Sangwon Solar Power Mar. 2019 0.2 MW
Solar Story Mar. 2019 2.0 MW
Dongjoo Solar Power (Samseong No. 11/Goheung) Mar. 2019 0.9 MW
  • We find and improve the cause of hidden loss in energy output to provide more stable and improved returns on power generation.
  • Total analysis of modules, systems, structures, sites, etc. based on the operation and maintenance (O&M) know-how of Korea's largest O&M company
    ※ It is a subsidiary of S-Energy Co., Ltd. with more than 20 years’ history based on outstanding solar module manufacturing and analysis technology.
  • Provides module precision analysis services in accordance with the IEC 61215 regulations
  • Site review

    3D mapping

  • Material and equipment review

    IR drone, Portable EL, Lab test

  • Energy output review

    Simulation & real raw data analysis

  • Solution provision

    Re-powering / renovation

Comparison to the services of other companies

Diagnostic category other companies S-Power
(PV + ESS)
Diagnostic category V V
Visual inspection of plants V V
Determination of adequacy of design and construction V V
Visual inspection of plants V V
Visual inspection of connector boards V V
Voltage/Current measurement for connector boards V V
Inverter operation and installation status V V
Inverter system diagnosis V V
Diagnosis of electrical performance of modules V
Measurement through thermal imaging cameras V
Estimation of energy output & analysis of potential loss V
Technical support for maintenance V
Presentation of measures to improve energy output V
Experimental analysis based on international electrotechnical standards (specialized labs and testing equipment in operation) V
Verification of defects in major products V
Verification of module components and scope of product repairs V
Power analysis V
Analysis of module and array output V
Shading element analysis V
Amount of insolation forecast data V
Capable of diagnosing PV+ESS power plants V
Inspection of civil engineering status (additional matters) V
Drone shooting of thermal images V