Inverter – SOLAX – X3-ULT-25K – hybrid – AFCI – HV

The SolaX X3-ULT-25K hybrid inverter is a three-phase HV class device designed for residential and commercial photovoltaic installations with energy storage capability. It allows for on-grid operation and EPS (backup) mode, supports high power photovoltaic panels (oversize up to 200%), and provides quick emergency switching while maintaining significant peak power.

Manufacturer: SolaX Power. The company offers advanced energy storage solutions and hybrid inverters, ensuring integration with the X-Cloud, support for resource aggregators (OpenADR), and communication options such as Modbus (RS485). SolaX devices are designed for flexible scenarios: on-grid, off-grid, micro-grid, and integration with generators and parallel systems.

Electrical and Functional Parameters

• Nominal AC Power (On-Grid): 25,000 VA
• Max. Apparent AC Power: 27,500 VA
• Grid Voltage / Configuration: 3P4W, 400 / 230 V
• Grid Frequency: 50 / 60 Hz
• Nominal AC Current: 36.3 A
• PV Input – Max. Recommended Array Power: 50,000 Wp
• Max. DC Input Power: 50,000 W
• Max. DC Voltage: 1000 V
• MPP Voltage Range: 160 – 950 V
• Number of MPPT / Strings per MPPT: 3 (2/2/2) – PV3 input available for 25K and 30K variants
• Battery Charging / Discharging Current: max. 60 A (30 × 2)
• Battery Voltage Range: 180 – 800 V
• EPS (with battery) – Peak Power: 2× nominal power for 10 s
• EPS – Continuous Power: 25,000 VA
• Switching Time to EPS: < 10 ms
• Max. Efficiency / European: 98.0% / 97.7%
• Battery Charging/Discharging Efficiency: 98.5% / 97.0%
• Electrical Protections: anti-islanding, reverse DC polarity protection, insulation monitoring, RCM, AC overcurrent, overload, and surge protection; SPD type II (AC and DC); optional AFCI

Mechanical and Environmental Parameters

• Protection Degree: IP65
• Operating Temperature: -35 °C to +60 °C (power reduction above +45 °C)
• Relative Humidity: 0 – 100 %
• Altitude: < 3000 m
• Storage Temperature: -40 °C to +70 °C
• Dimensions (W×H×D): 696 × 526 × 240 mm
• Weight: 47 kg
• Cooling: intelligent (smart cooling)
• Topology: transformerless
• Communication: Modbus (RS485), meter interface (RS485), DI ×5, DO ×2