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1New Renewable Energy Convergence Core Technology Development Project

Developed and certified: S40K grid-connected photovoltaic inverter 4kw
  • The highest efficiency in Korea (97.5%)
  • Certified in Korea in Jan 2014 (PV-GT1-1-0087)
4KW Inverter – Front View, Inverter – Lower Part, S40K  for indoor
Production suspended

2Developed and certified: 3.5kw grid-connected photovoltaic inverter for outdoor

Currently developing S35K grid-connected high-efficient photovoltaic inverter models
photovoltaic inverter with higher efficiency of 97.0% than other foreign models of the kind are under development - this new development is based on the waterproof, moisture-resistance, compact and light technologies for stability and convenience for outdoor installation.
3.5kw  Inverter – Front View , Lower part of Inverter , S30K for outdoor
Sample available: FEB. of Dec 2015

3Grid-connected 3.5kw and 4kw outdoor type photovoltaic Inverter Specification

Grid-connected 3kw and 4kw outdoor type photovoltaic Inverter Specification
Description S35K(Out-Door Type) S40K(In-Door Type)
Operate Galvanic Separation Public Grid / None-Isolated Public Grid / None-Isolated
PV Input Control MPPT (Maximum Power Point Tracking) MPPT (Maximum Power Point Tracking)
DC INPUT Maximum DC Voltage DC 500V DC 500V
Operating Voltage DC90~500V DC90~500V
Optimized Voltage DC370V DC370V
Max Input Current 16A 16A
MPPT Voltage Range DC100~460V DC100~460V
AC OUTPUT Supply Phases Single, 2 wire Single, 2 wire
Output Power AC220V / 13.6A / 3.0KW AC220V / 18.2A / 4.0KW
Output Voltage Range AC193V~242V AC193V~242V
Rated Voltabge & Frequency AC220V / 60Hz AC220V / 60Hz
Total Harmonic Distortion THD less than 5% at rated output THD less than 5% at rated output
Power Factor Over 0.95 at rated output Over 0.95 at rated output
Maximum Efficiency 97.00% 97.50%
European Efficiency 96.50% 97.10%
STRUCTURE Cooling Concept Air Cooling system Air Cooling system
Protecting Rating IP65 IP24
Noise Emission Under 50dB(A) Under 50dB(A)
Dimensions 410 * 150 * 310mm(W*D*H) 460 * 128 * 280mm(W*D*H)
Weight 12.1Kg 11.3Kg
Built_in Wall Mount Type Wall Mount Type
PROTECTION PV Input DC Over Voltage protection (over DC510V) DC Over Voltage protection (over DC510V)
Over Current protection (over 16A) Over Current protection (over 20A)
SPV Leakage Current detection SPV Leakage Current detection
AC Output AC over Voltage (Over AC242V) AC over Voltage (Over AC242V)
AC under Voltage (Under AC193V) AC under Voltage (Under AC193V)
Over Frequency(Over AC242V) Over Frequency(Over AC242V)
Under Frequency (Under 59.3Hz) Under Frequency (Under 59.3Hz)
Anti Islanding(Within 0.5sec) / RPV (reactive-power-variation) Anti Islanding(Within 0.5sec) / RPV (reactive-power-variation)
Over Temperature protection(refer IGBT Heat_Sink 85℃) Over Temperature protection(refer IGBT Heat_Sink 85℃)
DC Leakage Current protection DC Leakage Current protection
Environmental Operating Temperature -10~40℃ (No Freezing, No Dew condernsation) -10~40℃ (No Freezing, No Dew condernsation)
Storage Temperaature -20~65℃ (No Freezing, No Dew condernsation) -20~65℃ (No Freezing, No Dew condernsation)
Humidity 25~85%RH 25~85%RH
Cummunication Interface RS -232C/RS-485 RS -232C/RS-485, LAN

4S40K & S35K grid-connected photovoltaic inverter - Certificates

Certificate of New Excellent Technology
S40K grid-connected photovoltaic inverter

5NeT (Certificate for New Technology)

Manufacturing technology for independent operation of single-phase inverter up to 5km without ESS
Certificate for New Technology