What the SolaX X3-Pro G2 8kW is built for

SolaX X3-Pro G2 8kW Three-Phase String Inverter is designed for residential on-grid solar systems on three-phase supply where array size, roof layout and household demand have moved beyond the smaller inverter classes. It belongs in projects that need more PV capacity, more tracking flexibility and a more capable three-phase platform, while still staying firmly within residential specification rather than drifting into a commercial product that feels excessive for the job.

The 8kW version is the entry point into this X3-Pro G2 group, but it is not a stripped-down model. SolaX gives it the same core platform strengths that matter across the range, including built-in export power control, IP66 ingress protection, Type II surge protection on AC and DC sides, built-in global MPP scan and support for 24-hour monitoring via the wider X3-Pro G2 communications ecosystem. For larger homes, premium domestic solar projects and three-phase residential properties, that creates a very credible starting point.

Why the 8kW variant matters

The 8kW model makes sense where a three-phase home needs a capable inverter without jumping straight to the higher-output versions in the family. Rated output is 8kW, maximum output apparent power is 8.8kVA and maximum recommended PV array power is 12.0kWp. That combination is important because it gives the system meaningful headroom for modern panels while still matching the needs of many larger domestic roofs in a balanced way.

In practice, that means buyers can build a substantial residential array without choosing a model that is larger than the project needs. The X3-Pro G2 8kW also benefits from 150% DC oversizing and 110% AC overloading output, which helps keep the inverter commercially sensible in an era of higher-wattage solar modules. Rather than forcing a conservative array size, it gives installers room to design around available roof space and expected generation priorities.

Key features and practical benefits

• 8kW rated three-phase output for larger residential PV systems
• Up to 12.0kWp recommended PV array power
• 150% DC oversizing and 110% AC overloading output
• Dual MPPT design with up to 32A input current per MPP tracker
• 160 to 980V MPPT range with 200V start-up voltage
• Type II SPD on both AC and DC sides
• Built-in export power control function
• IP66 ingress protection for exposed installation environments
• Built-in global MPP scan and optional AFCI support

Those specifications are commercially useful because they translate into real installation flexibility. Dual MPPT design helps when the array is split across two roof sections or where the layout benefits from cleaner separation of strings. The 32A per MPP tracker figure is especially relevant with modern high-current modules. The wide MPPT operating window also gives installers more scope when designing strings on larger three-phase domestic systems.

Technical details that matter in practice

The X3-Pro G2 8kW uses a maximum PV input voltage of 1100V, rated PV input voltage of 650V and operating voltage range of 135 to 985V. MPPT range is 160 to 980V and start-up voltage is 200V. Rated output current is 12.2A and maximum output continuous current is 13.2A. Those are not just catalogue figures. They shape the kind of residential array this inverter can support and the level of flexibility installers have during system design and commissioning.

SolaX also specifies a broad protection package that includes over and under voltage protection, DC isolation protection, DC reverse-polarity protection, grid monitoring, DC injection monitoring, back-feed current monitoring, residual current detection, over-temperature protection, AC overcurrent protection and AC short-circuit protection. Certifications listed on the datasheet include VDE4105, EN 50549, AS 4777.2, IEC 61727, IEC 62116, IEC 61683, IEC 60068, EN 50530 and IEC/EN 62109-1 and -2. For specifiers and installers, that keeps the product grounded in serious three-phase residential work.

Monitoring, control and system integration

Monitoring and control are important parts of the X3-Pro G2 proposition. The family literature highlights 24-hour monitoring through WiFi, LAN and 4G options, plus smart loads management for applications such as heat pumps and smart EV chargers. Built-in export power control is equally useful because it supports residential jobs where export needs to be managed as part of the installation brief. Optional meter support is also listed in the communications specification.

That means the 8kW variant is not simply about DC to AC conversion. It is also suited to homes that are becoming more electrified and more actively managed. Where solar is being paired with broader household energy loads, the inverter offers a better level of control than a simpler three-phase unit aimed only at basic generation.

Installation and fitment considerations

Dimensions are 482 × 417 × 186 mm and ingress protection is IP66, so the inverter is sized for serious residential use without becoming difficult to place. Operating temperature range is -30 to 60°C and maximum operating altitude is 4000m. Communication interfaces are listed as RS485 and DRM, with optional meter support. Power consumption at night is under 3W and the topology is non-isolated. Those details all contribute to a product that is practical to specify and live with over time.

The 8kW model is particularly attractive on homes where three-phase supply is already present and the roof area can support a higher-output solar array. It is also a cleaner choice than trying to stretch a smaller inverter into a job that really needs more PV allowance and stronger three-phase capability.

Who this variant suits best

The X3-Pro G2 8kW suits larger three-phase homes, domestic properties with generous roof space, homes planning higher-output solar generation and projects that want dual-MPPT flexibility without stepping unnecessarily high in the range. It also suits residential installations where smart load interaction or export power control matter as part of the design brief.

Compared with the 10kW, 12kW, 15kW and 20kW versions, the 8kW model is the proportionate choice when the system is clearly beyond small-home solar but not yet at the upper end of residential three-phase design. That balance is what makes it commercially useful.

Final view

SolaX X3-Pro G2 8kW Three-Phase String Inverter is a well-judged residential three-phase inverter for higher-output domestic PV systems that need credible headroom, dual MPPT tracking and modern protection features. With support for up to 12.0kWp of PV, 150% DC oversizing, 110% AC overloading, Type II SPD on AC and DC, export power control, built-in global MPP scan and IP66 protection, it gives larger homes a strong platform for current solar system design.

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