Corporate History


1978/79 Start of Korean Government’s solar research testing for extreme cold winter solar performance by Passive Thermosyphon SHWS (x6) at Seoul’s Gwacheon Housing Estate. On-site testing evolved the modifications for a later high winter performance product for diffuse or dissipated winter radiation.
1979/80 2nd Winter Tests across six months proved the high performance modifications on same government owned buildings at Gwacheon Housing Estate. All solar Test results collated under worst winter conditions of sub zero -20C to -30C.
1981 First solar hot water system sales & installations began around Seoul suburbs for varying styles of residential roof types; plumbing methods and auxiliary heating to show case the technology for residential applications.
1982/83 Commenced multi-dealer network around Seoul suburbs to increase rate of residential solar hot water system installations.
1984/85 Seoul dealer network extended Nationwide ROK based upon the successful concept of the Seoul dealers – with large residential sales increase.
1986/87 First Commercial solar hot water applications for full roof solar arrays pumped to/fro large ground mounted thermal storage and gas booster stand-by


Established Jehin Corporation as a Government approved solar system “Engineering” company for solar water heating systems
Major ROK Nationwide recognition by winning the award for the Solar Design & Installation for the ROK Athlete’s Village at Olympic Park in Seoul.
1988 Jehin Corporation established for Research & Development Engineering & Installation for advanced solar thermal applications.
“Jehin’s New Office Opening:” 1st February ‘89 Official ribbon cutting ceremony at Seoul’s KOEX by Rt. Honourable Mr & Mrs. Robert Hawke, Prime Minister of Australia with the ROK Energy Ministry.


1990 Jehin Corporation achieved the officially licensed government upgrade to Jehin Co.Ltd as a fully registered Korean Manufacturer.
1994 1st Technical Collaboration Agreement (T.C.A.). Signed with “Solahart International” in Australia. This first international (TCA) was signed with “Solahart” the worldwide solar energy industry leader based in Australia. 


1996 Jehin’s Umsong Factory was opened for ROK R & D and manufacture of ultra-performance (blue-sputter copper) solar collectors and close coupled passive thermal storage.


1997 Jehin secured first registered patents for solar thermal devices & applications for ultra performance hot water systems.


2000 Jehin secured 2nd T.C.A. and exclusive Distributorship with Colmac (HP) International Inc. for the Heat Transfer R & D, and technology of Colmac Heat Pump Manufacturing, U.S.A.
2003 Jehin awarded the advanced (MEP) license for Machinery and Plumbing Installation by MOICE(Ministry of Industry, Commerce and Energy) of Korea.
2004 The Award Certification for Jehin’s designed & manufactured ultra-performance solar collectors and solar water heating system from KEMCO(Korea Energy Management Corp)


2005 MOICE officially lists Jehin Corporation for specialized expertise in Renewable Energy – and the Award of “INNO-BIZ Certificate” for innovations in R.E. Technology.
2006 Jehin’s Umsong Factory awarded accreditation for ISO 99001/2000 Certification
2007 Full listing achieved as a Venture & Engineering Company under ROK statutes.
2008  Jehin’s R & D Patent registrations:

1.     “Differential Temperature Control System”


2.     Integrated Window Solar Collector…..(with ROK Government   R&D Fund)


3.     Solar District Heating system …..(with KIET, Korean Institute of Energy Research)



2009/10 R & D completion for the Patents of the “MEGA” Collector





211/12 Jehin’s Award for a “Green Corporate Certificate” by final assessment for an “A-Grade Technical Appraisal” from KOTEC (Government Appraisal Organization)
2013 Official Jehin performance audit determines accumulated Jehin product installations have now a renewable energy thermal generation >19,500 GWh (inclusive 38,000 residential homes & commercial facilities) plus large community District Heating (in winter) reversible to District Cooling (in summer).
2014/15 Jehin began a new research program for vertical building wall Solar Façade System (JH-SFS) installation with KIET 2016 under ROK Government R & D fund.