About This Product

The Sigenergy 99.9kW 3 Phase C&I Hybrid Solar Inverter 8 MPPT IP66 is a commercial and industrial three-phase hybrid solar inverter designed for large rooftop and ground-mounted PV systems. It provides 99.9kW output capacity, eight independent MPPTs, and battery-ready integration with Sigenergy SigenStack battery systems.

This model is suited to higher-capacity commercial solar projects where array flexibility, battery compatibility, outdoor installation, and reliable system monitoring are important. Its IP66-rated enclosure, smart air cooling, and built-in electrical protections make it a practical choice for Australian C&I installations.

Who This Product Suits

The Sigenergy 99.9kW 3 Phase C&I Hybrid Solar Inverter 8 MPPT IP66 suits commercial and industrial sites that need a high-capacity three-phase inverter with future-ready battery storage capability.

It is a good fit for warehouses, factories, large offices, farms, schools, retail sites, and other businesses with significant daytime energy use. The eight MPPT design is useful where panels are installed across multiple roof faces, orientations, tilt angles, or areas with different shading conditions.

Specifications Explained

The Sigenergy 99.9kW 3 Phase C&I Hybrid Solar Inverter 8 MPPT IP66 delivers 99.9kW three-phase output for larger commercial PV systems. Its eight MPPTs allow installers to split the solar array into multiple independently tracked sections, helping maintain performance across more complex roof layouts.

The inverter supports high-efficiency conversion, with maximum efficiency listed up to 98.6% at 400V and 98.8% at 480V. It is battery-ready for Sigenergy SigenStack BAT 12.0 systems, supporting scalable battery configurations when storage is required as part of the project design.

Protection features include AFCI arc fault detection, DC reverse polarity protection, Type II surge protection, anti-islanding protection, and PV reverse connection alerts. Communication options include WLAN, Ethernet, RS485, and Sigenergy CommMod support for mobile network connectivity where required.

Summary

The Sigenergy 99.9kW 3 Phase C&I Hybrid Solar Inverter 8 MPPT IP66 is a high-capacity commercial hybrid inverter for three-phase solar projects. It combines 99.9kW output, eight MPPTs, IP66 outdoor protection, high conversion efficiency, and compatibility with Sigenergy SigenStack battery storage.

For installers, the key advantages are flexible string design, practical safety features, battery integration, and straightforward monitoring options. It is best suited to commercial sites that need a scalable inverter platform rather than a basic residential-style inverter.

Further Information From The Manufacturer

The Sigenergy 99.9kW 3 Phase C&I Hybrid Solar Inverter (Sigen PV 99.9M1-HYA-AU) is a high-performance, scalable hybrid inverter designed for large commercial and industrial solar installations. Combining superior energy conversion efficiency, advanced safety protections, and seamless energy storage compatibility, this inverter provides a future-ready solution for businesses seeking reliable solar power and integrated battery storage.

Delivering 99.9kW of three-phase output power, the Sigen PV 99.9M1-HYA-AU is ideal for large rooftop or ground-mounted commercial solar systems. With eight independent MPPTs (Maximum Power Point Trackers), it offers maximum flexibility in array configuration, optimising energy harvest across multiple roof orientations and varying shading conditions.

Built for energy storage integration, the inverter is battery-ready and fully compatible with SigenStack BAT 12.0 modules, supporting scalable configurations of 4 to 21 battery units. This makes it easy to upgrade from a standard PV system to a fully integrated PV + ESS (energy storage system) solution without additional hardware.

Efficiency and system performance are key highlights of this inverter, delivering up to 98.6% efficiency at 400V and 98.8% at 480V. Multiple units can be installed in parallel without the need for an external data logger, reducing balance-of-system costs while simplifying installation and expansion.

The Sigen PV 99.9M1-HYA-AU is engineered for robust, safe operation, featuring Arc Fault Circuit Interruption (AFCI) detection, DC reverse polarity protection, Type II surge protection, and anti-islanding protection. Instant PV reverse connection alerts help installers ensure correct wiring during commissioning, minimising potential system downtime.

With a durable IP66-rated enclosure, intelligent smart air cooling system, and wide operating range (-30°C to 60°C), this inverter is suitable for harsh outdoor environments, including high-altitude installations up to 5,000 metres (derating above 4,000 m). Despite its high capacity, it remains compact (918 x 640 x 340 mm) and lightweight at 78 kg, simplifying transport and installation.

Key Features:

• 99.9kW three-phase hybrid solar inverter for commercial & industrial applications
• 8 MPPTs for flexible solar array design
• Battery-ready, compatible with SigenStack BAT 12.0 (4-21 modules)
• High efficiency: up to 98.6% at 400V, 98.8% at 480V
• Parallel operation supported without a data logger
• IP66-rated enclosure and smart air cooling for reliable outdoor use
• Lightweight, compact design for easier handling and installation

General Specifications:

• Dimensions: 918 x 640 x 340 mm
• Weight: 78 kg
• Nighttime consumption: <3.5 W
• Operating temperature: -30°C to 60°C
• Storage temperature: -40°C to 70°C
• 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, Ethernet, RS485, Sigen CommMod (4G/3G/2G)

Benefits:

• Future-proof solution with easy upgrade to PV + ESS systems
• Supports multiple units in parallel for larger installations without external loggers
• Industry-leading AFCI safety detection for reliable operation
• Instant alerts simplify installation and reduce downtime
• IP66 outdoor protection ensures worry-free operation in all weather conditions
• Lightweight and compact, reducing transport and installation costs

The Sigenergy Sigen PV 99.9M1-HYA-AU Hybrid Solar Inverter is a robust, high-efficiency solution for large commercial solar and energy storage projects, combining flexibility, safety, and performance in a single, installer-friendly unit.

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.