Deyeb DEYEB ST-18-21K-LV string inverters

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DEYEB ST-18-21K-LV

Grid-tie string inverter · 18–21 kW

String Inverters18–21 kW

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Technical specifications

PV String Input Date

Parameter	ST-18-21K-LV/A	ST-18-21K-LV/B	ST-18-21K-LV/C
Max. PV Input Power(kW)	27	30	31.5
Max. PV Input Voltage(V)	800	800	800
Start-up Voltage(V)	250	250	250
MPPT voltage range(V)	200-700	200-700	200-700
Rated PV Input voltage(V)	350	350	350
Max. Operating PV Input Current (A)	40+40	40+40	40+40
Max. Input Short Circuit Current (A)	60+60	60+60	60+60
No. of MPP Trackers/No. of Strings per MPP Tracker	2/3+3	2/3+3	2/3+3

AC Output Side

Parameter	ST-18-21K-LV/A	ST-18-21K-LV/B	ST-18-21K-LV/C
Rated AC Output Active Power(kW)	18	20	21
Max. AC Output Apparent Power(kVA)	18	20	21
Rated AC output current (A)	47.3/45.2	52.5/50.2	55.2/52.7
Max. AC Output Current(A)	47.3/45.2	52.5/50.2	55.2/52.7
Rated output voltage/range (V)	127V/220V, 133V/230V 0.85UN-1.1UN	127V/220V, 133V/230V 0.85UN-1.1UN	127V/220V, 133V/230V 0.85UN-1.1UN
Grid Connection Form	3L/N/PE	3L/N/PE	3L/N/PE
Rated Output Grid Frequency/range(Hz)	50/45-55, 60/55-65	50/45-55, 60/55-65	50/45-55, 60/55-65
Power Factor Adjustment Range	0.8 leading to 0.8lagging	0.8 leading to 0.8lagging	0.8 leading to 0.8lagging
Total Current Harmonic Distortion THDi	<3%	<3%	<3%
DC Injection Current	<0.5%ln	<0.5%ln	<0.5%ln

Efficiency

Parameter	ST-18-21K-LV/A	ST-18-21K-LV/B	ST-18-21K-LV/C
Max. Efficiency	98.60%	98.60%	98.60%
MPPT Efficiency	＞99%	＞99%	＞99%

Equipment Protection

Parameter	ST-18-21K-LV/A	ST-18-21K-LV/B	ST-18-21K-LV/C
DC Reverse Polarity Protection	Yes	Yes	Yes
AC Output Overcurrent Protection	Yes	Yes	Yes
AC Output Overvoltage Protection	Yes	Yes	Yes
AC Output Short Circuit Protection	Yes	Yes	Yes
Thermal Protection	Yes	Yes	Yes
Insulation Impedance Detection	Yes	Yes	Yes
DC Component Monitoring	Yes	Yes	Yes
Arc Fault Circuit Interrupter (AFCI)	Optional	Optional	Optional
Anti-islanding Protection	Yes	Yes	Yes
Residual Current Detection	Yes	Yes	Yes
Surge Protection Level	TYPE II(DC),TYPE II(AC)	TYPE II(DC),TYPE II(AC)	TYPE II(DC),TYPE II(AC)
DC Switch	Yes	Yes	Yes

Interface

Parameter	ST-18-21K-LV/A	ST-18-21K-LV/B	ST-18-21K-LV/C
Communication Interface	RS485/RS232	RS485/RS232	RS485/RS232
Monitor Mode	GPRS/WIFI/Bluetooth/4G/LAN(optional)	GPRS/WIFI/Bluetooth/4G/LAN(optional)	GPRS/WIFI/Bluetooth/4G/LAN(optional)

General Data

Parameter	ST-18-21K-LV/A	ST-18-21K-LV/B	ST-18-21K-LV/C
Operating Temperature Range (°C)	-25 to +65℃, >45℃ Derating	-25 to +65℃, >45℃ Derating	-25 to +65℃, >45℃ Derating
Permissible Ambient Humidity	0~100%	0~100%	0~100%
Permissible Altitude (m)	2000m	2000m	2000m
Noise (dB)	≤50 dB(A)	≤50 dB(A)	≤50 dB(A)
Ingress Protection(IP) Rating	IP 65	IP 65	IP 65
Inverter Topology	Non-Isolated	Non-Isolated	Non-Isolated
Over Voltage Category	OVC II(DC),OVC III(AC)	OVC II(DC),OVC III(AC)	OVC II(DC),OVC III(AC)
Cabinet Size (WxHxD mm)	330×572×206 (Excluding Connectors and Brackets)	330×572×206 (Excluding Connectors and Brackets)	330×572×206 (Excluding Connectors and Brackets)
Weight [kg]	28.7	28.7	28.7
Warranty [year]	5 years	5 years	5 years
Type Of Cooling	Intelligent Air Cooling	Intelligent Air Cooling	Intelligent Air Cooling
Grid Regulation	NBR 16149, NBR 16150, EN 50549, RD 140	NBR 16149, NBR 16150, EN 50549, RD 140	NBR 16149, NBR 16150, EN 50549, RD 140
Safety EMC/Standard	IEC/EN 61000-6-1/2/3/4, IEC/EN 62109-1, IEC/EN 62109-2	IEC/EN 61000-6-1/2/3/4, IEC/EN 62109-1, IEC/EN 62109-2	IEC/EN 61000-6-1/2/3/4, IEC/EN 62109-1, IEC/EN 62109-2
Seguridad EMC/Estándar	IEC/EN 61000-6-1/2/3/4, IEC/EN 62109-1, IEC/EN 62109-2	IEC/EN 61000-6-1/2/3/4, IEC/EN 62109-1, IEC/EN 62109-2	IEC/EN 61000-6-1/2/3/4, IEC/EN 62109-1, IEC/EN 62109-2