About This Product

The Sigenergy 125kW 3 Phase C&I Hybrid Solar Inverter 8 MPPT IP66 is a high-capacity three-phase hybrid inverter for commercial and industrial solar systems. It is designed for large PV arrays and can also be integrated with Sigenergy SigenStack battery modules, making it suitable for projects that need solar generation now with energy storage capability built into the system design.

This model provides 125 kW nominal AC output, supports up to 220 kWp of PV input, and uses eight independent MPPTs with two PV strings per MPPT. That gives installers more flexibility when designing arrays across different roof faces, tilt angles or string layouts.

Who This Product Suits

The Sigenergy 125kW 3 Phase C&I Hybrid Solar Inverter 8 MPPT IP66 suits large commercial rooftops, industrial buildings, warehouses, schools, farms and energy-intensive business sites using three-phase power.

It is a strong fit where the site needs a large solar inverter with battery-ready capability, multiple MPPT inputs, outdoor-rated protection and the ability to form part of a larger Sigenergy commercial energy system. It is best suited to professional C&I installations where system design, grid connection and battery integration are being handled by qualified installers.

Specifications Explained

The Sigenergy 125kW 3 Phase C&I Hybrid Solar Inverter 8 MPPT IP66 has a nominal AC output of 125 kW and a maximum apparent output of 137.5 kVA. On the DC side, it supports up to 220 kWp of PV input, a maximum DC input voltage of 1,100 V, a start-up voltage of 180 V and an MPPT operating range of 160 V to 1,000 V.

The eight MPPT design allows more flexible stringing than smaller commercial inverters, with two PV strings per MPPT and up to 40 A input current per MPPT. For storage integration, it is compatible with SigenStack BAT 12.0 modules, supporting configurations from 4 to 21 battery modules with up to 137.5 kW charge and discharge power.

Efficiency is rated up to 98.6% on 380/400 V systems and up to 98.8% on 480 V systems. Built-in protection features include DC reverse polarity protection, insulation monitoring, residual current monitoring, AFCI, AC overcurrent and overvoltage protection, short-circuit protection, Type II DC and AC surge protection, and anti-islanding protection. Communication options include WLAN, Fast Ethernet, RS485 and Sigen CommMod for mobile network connectivity.

Summary

The Sigenergy 125kW 3 Phase C&I Hybrid Solar Inverter 8 MPPT IP66 is a large three-phase hybrid inverter for commercial solar projects that need high PV capacity, flexible MPPT design and battery-ready operation. Its 125 kW output, 8 MPPT layout, SigenStack battery compatibility and IP66 enclosure make it well suited to demanding Australian commercial and industrial installations.

For installers, the main advantages are the wide PV operating range, high input capacity, integrated safety functions, outdoor-rated design and the ability to connect into Sigenergy’s broader C&I energy storage platform.

Further Information From The Manufacturer

The Sigenergy 125kW 3 Phase C&I Hybrid Solar Inverter (Sigen PV 125M1-HYA-AU) is a high-capacity, industrial-grade hybrid inverter designed for large commercial and utility-scale solar installations. Combining robust power output, advanced safety protections, and seamless battery integration, this inverter delivers a reliable, efficient, and future-ready solution for demanding solar energy projects.

With 125kW of three-phase output, the Sigen PV 125M1-HYA-AU is ideal for industrial rooftops, commercial facilities, or utility-scale solar farms. Equipped with eight independent MPPTs (Maximum Power Point Trackers) supporting two strings each, the inverter provides flexible solar array design, maximising energy harvest across varying roof orientations and shading conditions.

The inverter is fully battery-ready, compatible with SigenStack BAT 12.0 modules, supporting 4 to 21 battery units for scalable energy storage integration. Parallel operation is supported without requiring an external data logger, allowing easy system expansion and reducing balance-of-system (BOS) costs.

Efficiency and performance are key highlights, with up to 98.6% efficiency at 400V and 98.8% at 480V, ensuring maximum energy conversion for high-demand commercial and industrial systems.

Engineered for safety and reliability, the inverter features Arc Fault Circuit Interruption (AFCI) detection, Type II surge protection, DC reverse polarity protection, residual current monitoring, and anti-islanding protection. Instant PV reverse connection alerts make commissioning safer and faster.

Built for harsh environments, the Sigen PV 125M1-HYA-AU features a durable IP66-rated enclosure and smart air cooling, capable of operating across a wide temperature range (-30°C to 60°C) and altitudes up to 5,000 m (derating above 4,000 m). Despite its high capacity, the inverter is compact (918 x 640 x 340 mm) and lightweight at 78 kg, simplifying transport and installation.

Key Features:

• 125kW three-phase hybrid solar inverter for industrial and utility-scale applications
• Battery-ready, compatible with SigenStack BAT 12.0 (4-21 modules)
• 8 MPPTs for flexible solar array configuration
• High efficiency: up to 98.6% at 400V, 98.8% at 480V
• Parallel operation supported without external data logger
• IP66-rated enclosure and smart air cooling for reliable outdoor operation
• Lightweight and compact design for easy installation

General Specifications:

• Dimensions: 918 x 640 x 340 mm
• Weight: 78 kg
• Nighttime power consumption: <3.5 W
• Operating temperature: -30°C to 60°C
• Storage temperature: -40°C to 70°C
• Relative humidity: 0% – 100%
• Maximum altitude: 5,000 m (derating above 4,000 m)
• PV connection: MC4, max 6 mm²
• AC connection: OT/DT terminal, max 240 mm²
• Communication: WLAN, Fast Ethernet, RS485, Sigen CommMod (4G/3G/2G)

Safety & Protections:

• AFCI detection for advanced fire protection
• DC reverse polarity protection
• Type II surge protection
• Residual current monitoring
• Anti-islanding protection
• Instant PV reverse connection alerts

Benefits:

• Easy upgrade from PV-only to PV + ESS systems
• Supports parallel units for larger installations without external loggers
• Industry-leading AFCI safety detection ensures reliable operation
• Instant alerts simplify commissioning and reduce downtime
• IP66-rated outdoor protection for all-weather reliability
• Lightweight, compact design reduces transport and installation costs

The Sigenergy Sigen PV 125M1-HYA-AU Hybrid Solar Inverter delivers efficient, scalable, and safe energy conversion for large-scale commercial and industrial solar installations, making it an ideal solution for businesses and utilities seeking a future-proof solar plus energy storage system.

Weights & Measurements Information

About Sigenergy

Sigenergy develops premium hybrid inverters and modular battery systems commonly used in residential and light-commercial energy-storage projects. Their products focus on safety, rapid installation, and high-power backup capability. With strong attention to software and user interface design, Sigenergy systems provide reliable day-to-day performance and detailed monitoring.