Inverter SPI125K-B 125 kW 3F Kehua

Inverter SPI125K-B 125 kW (on‑grid) is a three-phase photovoltaic inverter from the SPI-B series designed for commercial and industrial installations. The device converts direct current from PV fields into three-phase alternating current and feeds it into the grid, offering a high input voltage range, multi-channel MPPT, and advanced protective and communication features.

About the manufacturer

Design and production: Kehua Data Co., Ltd. (Kehua Tech). The company is based in Xiamen, Fujian, China, and offers solutions in power electronics and energy management systems, including photovoltaic inverters from the SPI series.

Key electrical parameters

• Maximum PV input voltage: 1100 V
• Start voltage / minimum input voltage: 200 V / 250 V
• Nominal input voltage: 585 V
• MPPT range: 200 V to 1000 V
• MPPT configuration: 9 MPPT channels (6 channels optionally)
• Maximum MPPT input current: 9 × 30 A (optionally 6 × 40 A)
• Max. short-circuit current DC: 9 × 50 A (optionally 6 × 50 A)
• Nominal output power: 125 kW
• Maximum output power: 137.5 kW
• Grid voltage (output): 3/N/PE, 230 V / 400 V (three-phase operation)
• Grid voltage range: 320 V to 460 V
• Frequency: 50 Hz / 60 Hz (operating range 45–55 Hz or 55–65 Hz)
• Nominal output current: 180.5 A
• Maximum output current: 198.5 A
• Power factor: >0.99 (at nominal power); regulation range ±0.8
• THD (total harmonic distortion): <3% (at nominal power)
• DC component (direct current) at output: <0.5% of input
• Maximum efficiency: ~98.7%

Mechanical and environmental parameters

• Dimensions (W × H × D): 1 030 mm × 610 mm × 345 mm
• Weight: 80 kg
• Protection class: IP66 (suitable for outdoor installation)
• Mounting type: wall mounting
• Cooling: intelligent air cooling system
• Operating temperature range: -35 °C to +60 °C
• Operating humidity: 0–100%
• Maximum operating altitude: 4 000 m (above 3 000 m with derating of nominal power)
• Display and local interface: LED, Bluetooth + app (APP)
• Communication interfaces: RS485; optionally GPRS / WI‑FI; supports PLC (option)
• DC input terminal type: MC4
• AC output terminal type: OT terminal (maximum cable cross-section area up to 240 mm²)
• Self-consumption at night: <2 W