Certifications and product development
| 2019 | Jun. | 100kW ESS-purpose PCS developed |
| Feb. | 100kW LV photovoltaic inverter (junction box NOT included) developed and KS certification obtained | |
| 2018 | Dec. | PV monitoring system (wired/wireless) developed |
| Nov. | 34kW junction box-integrated PV inverter developed and KS certification obtained | |
| Oct. | 100kW LV photovoltaic inverter developed and KS certification obtained | |
| Sep. |
– Obtained CE Marking for 15kW, 20kW and 50kW PV inverters – 100kW HV photovoltaic inverter developed and KS certification obtained |
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| Jun. | Obtained KS certification for 3KW PV inverter (DSP-123K6-OD) | |
| 2017 | Jun. | 15kW, 20wW and 25kW PV inverters developed and KS certification obtained |
| 2016 | Dec. | Slated to obtain KS certification for 34KW PV inverter |
| Oct. | – Anticipated to obtain CE Marking for 34KW PV inverter – Expected to obtain CE Marking for 3KW PV inverter |
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| Aug. | Planned to develop 1M PV inverter | |
| Jul. | 350KW and 500KW PV inverters developed | |
| Jun. | 700KW PV inverter developed | |
| May | 34KW PV inverter developed | |
| Mar. | Obtained KS certification for 3KW PV inverter (DSP-123K5) | |
| 2015 | Dec. | Obtained CE Marking for 620KW inverter (DSP-33620K(T)) exported to Thailand |
| Jan. | Obtained new & renewable energy facility certification for 3KW PV inverter (DSP-123K) | |
| 2014 | 2014. | 75KW and 100KW PV inverters developed |
| 2013 | Dec. | Obtained ETL certification for 250kW PV inverter (DSP-M33250KUS) |
| Feb. | – Obtained TUV certification for 75kW and 100kW PV inverters – Obtained TUV certification for 200kW and 250kW PV inverters |
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| 2010 | Dec. | Obtained Australian certification for 3kW PV inverter (DSP-123K2) |
| Jul. | Obtained CE Mark for 255kW, 510kW and 1000kW PV inverters (DSP-M331000K, M33250K, M33500K) |
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| Jun. | – TR-based PV inverters (10K, 20K, 30K, 50K) developed – Obtained CE Mark for 3kW PV inverters (DSP-123K2, DSP-123KH) |
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| Apr. | – 50kW and 500kW PV inverters (M33250K, M33500K) developed for the first time in the Republic of Korea – Obtained new & renewable energy facility certification for 3kW PV inverters (DSP-123K2, DSP-123KH) |
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| Mar. | Obtained TUV certification (quality system certification) | |
| 2009 | Jun. | 255kW PV inverter (DSP-33255K) developed |
| May | Obtained CE Mark for 3kW PV inverter (DSP-M123KE) | |
| Apr. | 200kW PV inverter (DSP-33200K) developed | |
| Mar. | Obtained overseas standards for single-phase PV inverters | |
| 2008 | Aug. | 100kW PV inverter (DSP-33100K) developed and mass production launched |
| Jun. | Single-phase 3kW waterproof multi-MPPT PV inverter developed | |
| Apr. | Obtained new & renewable energy facility certification for 3kW waterproof multi-MPPT PV inverter (DSP-M123K) and mass production launched | |
| Jan. | 30kW PV inverter (DSP-3330K) developed and mass production launched | |
| 2007 | Nov. | 50kW PV inverter (DSP-3350K) developed and mass production launched |
| Jul. | – Uninterruptible power system (UPS) with single-phase 2KW PV power generation developed – Uninterruptible power system (UPS) with single-phase 3KW PV power generation |
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| Jun. | – 20kW PV inverter (DSP-3320K) developed and mass production launched – R&D Centre established |
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| 2006 | Dec. | Obtained new & renewable energy facility certification for 2.5kW PV inverter (DSP-1225K) and mass production launched |
| Nov. | 10kW PV inverter developed and mass production launched | |
| Oct. | Obtained new & renewable energy facility certification for 3kW PV inverter (DSP-123K) and mass production launched | |
| 2005 | Oct. | 1.5kW, 3kW and 5kW PV inverters successfully developed |
Patents
| 2018 | Jun. | The junction box system with temperature and humidity control features and temperature/humidity control methods using the junction box |
| 2017 | Jul. | Maximum power point tracking (MPPT) method for the PV system |
| Jan. | The PV system with ground fault detection and power storage features | |
| 2016 | Dec. | A stage for electric plating apparatus for plating on the flexible/glass substrate |
| Nov. | – Plating apparatus with counter electrode including the curved surface – A method to measure the PV module’s insulation resistance |
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| Oct. | Plating/rinsing-enabled plating apparatus and method | |
| 2014 | Nov. | A method for fabricating the thin-film compound solar cell |
| Oct. | Structures for PV power generation | |
| Mar. | Substrate-moving, mist-spraying chemical vapor deposition (CVD) and methods for fabricating the transparent conductive oxide (TCO) and thin-film CIS solar cell | |
| 2013 | Jul. | A method for fabricating the B/BⅢ/BⅥ-type, thin-film solar cell, applying both single electrolyzer deposition and multi-electrolyzer deposition simultaneously |
| Jan. | A method for fabricating the CIGS solar cell | |
| 2012 | Jan. | A method to control the PV module’s parallel operation |
| 2011 | Sep. | – A single-phase inverter circuit for the PV grid-connected type – A method for fabricating the CIS solar cell, using the ultra-thin flexible glass substrate |
| 2008 | Jul. | PV system-equipped uninterruptible power system (UPS) |
| Jun. | Battery charge equalizer | |
| 2007 | Oct. | – An active clamp current-fed push-pull DC-DC converter
– Single-stage converter compensating power factor |
| 2004 | Feb. | – Single-stage converter compensating power factor – Half-bridge converter with high power factor |
| 2000 | Jun. | Overcurrent protective circuit for a power semiconductor device |
Government-funded projects
| 2019 | May | A 100kW high-efficiency, high-power-density PV inverter with wideband gap power semiconductor developed |
| 2018 | Oct. | An ultra-small and high-efficiency WBG-based residential PV system developed |
| 2017 | Sep. | An NB-IoT PV monitoring system developed and distributed |
| 2015 | Dec. | A grid-connected, high-efficiency and highly reliable 1KW mini-inverter for self-powered new & renewable distributed generation developed (Industrial Technology Innovation Program) |
| Oct. | A building energy-saving PV-LED convergence system developed (Industrial Technology Innovation Program) | |
| May | A regeneration energy storage system for elevator safety developed (Economic Cooperation Zone Incubation Program) | |
| 2014 | Nov. | Power generation efficiency improvement technology for the micro-PV system developed and commercialized (2014 Special Zone Commercialization Program) |
| 2012 | Jul. | PV system module output stabilized; demonstration test website developed and operated; business model developed (Regional Economic Cooperation Program) |
| Jun. | – Module-level PV monitoring parts and system developed (Leading Industries in Chungcheong Regional Economic Zone) – SoC regular (95% or higher in power generation efficiency) and low-price ($0.3/W or lower) MiC smart PV systems (Source Technology Development Program for New & Renewable Energy Convergence) |
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| May | A quality-upgraded and cost-saving version of the grid-connected 250KW PV inverter developed (Health Care R&D Support Program) | |
| 2011 | Jun. | 4KW high-efficiency, grid-connected PV inverter developed (Source Technology Development Program for New & Renewable Energy Convergence) |
| 2010 | Jul. | An electron relay enhance (ERE) for maximizing solar cell efficiency (Chungcheong Economic Zone Cooperation Program) |
| May | A power-storage, PV active-grid power converter developed (Leading Industries in Honam Economic Zone) | |
| 2009 | Dec. | DMPPT module and system developed for enhancing the efficiency of the PV system (Chungcheong Economic Zone Cooperation Program) |
| Oct. | Electrodeposition-based CIGS precursor developed and super-low and high-efficiency CIGS solar cell developed, using the precursor (Leading Industries in Honam Economic Zone) | |
| Jun. | – Cost-down technology for the fuel-cell power converter developed (New & Renewable Energy Technology Development Program) – A high-performance DSP controller needed in the PV converter designed and fabricated (Academia-industry Technology Development Support Program) |
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| 2008 | Dec. | A 1MW module PV inverter developed (100KW module inverter adopted) (New & Renewable Energy Technology Development Program) |
| Jul. | A Study of the Islanding Detection for State Estimation Method-based PV System (Academia-industry Technology Development Support Program) | |
| 2007 | Jul. | A single-phase 3KW waterproof multi-MPPT PV inverter developed (SMSE Technology Innovation Development Program) |