Sungrow SG4.0RT-EU 3-phase grid inverter 4.0 kW

The Sungrow SG4.0RT-EU grid inverter is a three-phase string inverter designed for PV systems with a maximum AC power of 4.0 kW. The device offers a high maximum efficiency of 98.2% and a wide MPPT input range (160 V – 850 V) with a nominal input voltage of 600 V, making it a suitable solution for installations with modules up to 1000 Vdc.

The manufacturer of the device is Sungrow Power Supply Co., Ltd., an international company specializing in solutions for solar energy. The company provides grid and system inverters with built-in protective features (including AFCI, DC/AC SPD) and communication options (WLAN/Ethernet/RS485), ensuring monitoring support and remote updates.

Electrical Parameters

• Rated AC power (@230V, 50Hz): 4000 W
• Max. AC output power: 4400 VA
• Max. AC output current: 6.8 A
• Nominal AC voltage / voltage range: 3 / N / PE, 230 / 400 V; 180 V – 276 V / 311 V – 478 V
• Nominal frequency / range: 50 Hz / 45 – 55 Hz (also available in 60 Hz / 55 – 65 Hz version)
• Max. efficiency: 98.2 %
• European efficiency: 97.0 %
• MPPT range: 160 V – 1000 V (MPP), MPPT range for nominal power 160 V – 850 V
• Max. PV input current: 25 A (12.5 A / 12.5 A)
• Max. current at DC connector: 30 A
• Protections: network monitoring, reverse DC connection protection, AC short-circuit protection, current leakage protection, DC Type II / AC Type II SPD, arc-fault circuit interrupter (AFCI), PID recovery function

Mechanical Parameters

• Dimensions (W×H×D): 370 × 480 × 195 mm
• Weight: 18 kg
• Protection rating: IP65
• Mounting method: wall mounting (wall-mounting bracket)
• Cooling: natural cooling
• Operating temperature range: -25 °C to 60 °C
• Permissible relative humidity (non-condensing): 0% – 100%
• Max. operating height: 4000 m (above 2000 m with derating)
• Noise level (typ.): 35 dB (A)
• Display and communication type: LED; WLAN / Ethernet / RS485 / DI / DO