Description

Product Description

• Turnkey, containerised MV PV inverter station built on the SG4400UD-MV platform with advanced three-level inverter technology for high efficiency and reliability.

• Engineered for 1500 V DC high-voltage PV system compatibility with multiple independent MPPTs to maximise energy harvest from solar fields.

• Integrated MV transformer steps up low-voltage AC to 33 kV for direct grid connection, with built-in MV switchgear and LV auxiliary power supply.

• Modular design simplifies transport, installation, service and maintenance while housing protections and control systems in a 20-foot container footprint.

• Includes grid support functions such as low/high voltage ride-through (L/HVRT), active/reactive power control and power ramp rate control to satisfy grid code requirements.

• Comprehensive protection and monitoring features cover DC/AC protection, surge protection, insulation and ground-fault monitoring, and optional “Q at night” support.

Technical Specifications

DC (PV) Input

• Maximum PV input voltage: 1500 V DC.

• MPP voltage operating range: ~895 V – 1500 V.

• Number of independent MPPTs: 4.

• Number of DC inputs: 20 (optional up to 28).

• Maximum PV input current: 4 × 1435 A.

AC (Output) / Power Ratings

• Rated AC output power: ~4400 kVA @ 45 °C.

• Maximum AC power: up to ~5060 kVA (at lower ambient temperatures).

• Nominal medium-voltage output level: 33 kV (configurable within 10 kV–35 kV).

• Maximum AC current: ~292.2 A.

• Power factor: > 0.99 nominal; adjustable 0.8 leading to 0.8 lagging.

• Grid frequency: 50 Hz (45–55 Hz) and 60 Hz (55–65 Hz) variants.

Efficiency & Performance

• Maximum inverter efficiency: ~99 %.

• European (weighted) efficiency: ~98.7 – 98.8 %.

• Total harmonic distortion (THD) < 3 % at nominal power.

Transformer & Grid Interface

• Integrated MV transformer with step-up from LV to 33 kV.

• Transformer vector: typically Dy11 (common configuration).

• Transformer cooling: ONAN (oil-natural, air-natural).

Protection & Grid Support

• DC input protection: load break switch + fuse.

• Inverter output and AC MV output protection: circuit breakers.

• Surge protection: DC Type II and AC Type II.

• Grid monitoring, ground-fault monitoring, insulation monitoring and overheat protection.

• Grid support functions: L/HVRT, active/reactive power control, ramp rate control and optional Q-at-night.

Physical & Environmental

• Tank/container dimensions: ~6058 × 2896 × 2438 mm (20-foot standard).

• Protection degree: Inverter IP65; other components IP54 (typical).

• Operating ambient temperature: −35 °C to +60 °C (derating above ~45 °C).

• Relative humidity range: 0 %–100 % non-condensing.

• Cooling method: temperature-controlled forced air.

• Maximum standard operating altitude: ~1000 m (higher with options).

• Auxiliary power supply: ~15 kVA (optional up to 40 kVA).

Communications & Monitoring

• Displays: LED and WebHMI/status indicators.

• Communication interfaces: RS485, Ethernet; optional optical fibre.

Compliance & Standards

• Conforms to CE and international standards including IEC 62109, IEC 61727, IEC 62116, IEC 62271-202, IEC 62271-200 and IEC 60076 among others.