About This Product

The Sigenergy 99.9kW 3 Phase C&I PV Solar Inverter 4 MPPT IP66 is a commercial and industrial three-phase solar inverter for larger PV systems. It is part of Sigenergy’s Sigen PV commercial inverter range and is designed for high-capacity rooftop or ground-mount solar arrays. The inverter provides 99.9kW nominal AC output, supports up to 199.8kW of PV input, and uses an IP66-rated enclosure for outdoor installation.

Who This Product Suits

The Sigenergy 99.9kW 3 Phase C&I PV Solar Inverter 4 MPPT IP66 suits commercial solar jobs where a large three-phase inverter is required, such as warehouses, factories, farms, schools, retail sites and other high-consumption facilities. It is best suited to installer-designed systems with multiple panel strings, high-power solar modules and a compliant commercial switchboard and protection setup.

Specifications Explained

The Sigenergy 99.9kW 3 Phase C&I PV Solar Inverter 4 MPPT IP66 has a 99.9kW nominal output rating for three-phase commercial grid-connected solar systems. Its 199,800Wp maximum PV input capacity allows designers to oversize the solar array where appropriate under local rules and project design limits. The inverter has a maximum DC input voltage of 1,100V, a 180V start-up voltage, and an MPPT operating range of 160V to 1,000V. It also includes safety and installation features such as AFCI protection, PV reverse connection detection, surge protection, residual current protection, anti-islanding protection and smart air cooling.

Summary

The Sigenergy 99.9kW 3 Phase C&I PV Solar Inverter 4 MPPT IP66 is a high-capacity C&I inverter for larger Australian solar installations. It offers strong PV input capacity, three-phase output, outdoor-rated construction and built-in electrical protection features. It is a practical option for commercial projects where installers need a large inverter platform with flexible string design and straightforward monitoring integration.

Further Information From The Manufacturer

The Sigenergy 99.9kW C&I PV Solar Inverter (Sigen PV 99.9M1 AU) is a powerful, high-efficiency inverter designed for large commercial and industrial solar installations. Built to support high-capacity solar arrays, this advanced three-phase inverter combines exceptional energy conversion efficiency, extensive safety features, and flexible system design in a durable, compact form factor.

With an impressive maximum PV input power of 199.8kW and eight independent MPPTs (Maximum Power Point Trackers), each supporting two strings, the inverter allows highly flexible string configurations. This makes it ideal for complex commercial rooftop systems or ground-mounted solar projects where panels may be installed across multiple orientations or subject to varying shading conditions. The 98.6% peak efficiency ensures optimal energy conversion and maximum solar generation.

Designed for reliability in demanding environments, the IP66-rated enclosure enables safe outdoor installation while protecting internal components from dust and water ingress. Integrated Arc Fault Circuit Interruption (AFCI), residual current protection, and DC/AC surge protection provide advanced system safety and help safeguard both the inverter and connected equipment.

The inverter also features an intelligent air-cooling system to maintain stable operating temperatures and ensure long-term performance in Australia’s harsh climate conditions. High current input capability of up to 32A per MPPT allows compatibility with modern high-power solar modules, further enhancing system performance and flexibility.

For installers and system designers, the Sigen PV 99.9M1 AU simplifies planning and deployment. The inverter shares the same physical dimensions and weight as other models in the Sigen PV series, making logistics, mounting, and system expansion easier across projects. Parallel operation is supported without the need for an external data logger, helping reduce balance-of-system (BOS) costs.

Key Features:

• 99.9kW three-phase commercial & industrial solar inverter
• Maximum PV input power of 199,800 Wp
• 8 MPPTs with dual string inputs for flexible solar array design
• Up to 98.6% maximum efficiency for optimal energy conversion
• IP66-rated enclosure for full outdoor installation
• Built-in AFCI, residual current protection, and surge protection
• Smart air cooling system for reliable thermal management
• High current inputs up to 32A per MPPT for high-power solar modules
• Consistent dimensions and weight across Sigen PV inverter models for easier project planning

Benefits:

• Ideal for large commercial rooftop and ground-mounted solar systems
• Multiple MPPTs support complex solar array layouts and maximise energy yield
• Reduced installation costs with parallel operation and no external logger required
• Compatible with the latest high-output solar panels
• Simplified logistics thanks to consistent inverter size and weight across the range

The Sigenergy Sigen PV 99.9M1 AU 99.9kW Commercial Solar Inverter is engineered to deliver maximum performance, advanced safety, and installation flexibility, making it a reliable solution for large-scale commercial and industrial solar power systems

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.