What the SolaX X3-MEGA G2 50kW is built for

SolaX X3-MEGA G2 50kW Three-Phase String Inverter is intended for commercial and industrial on-grid solar installations where the project scale is clearly beyond mid-sized commercial rooftops and moving into larger, more segmented PV designs. It sits in the commercial and industrial string inverter class within the SolaX range and is aimed at businesses, agricultural sites, workshops, warehouses and industrial premises that need substantial inverter output with enough MPPT flexibility to keep system design efficient.

The main value of the 50kW version is that it adds both output and tracking flexibility over the 40kW model. That matters because once roof space and array size start to grow, more MPPT channels can be as important as higher AC output. More trackers allow cleaner array grouping and better design discipline across varied roof sections. The 50kW X3-MEGA G2 therefore does more than just raise power. It broadens how the project can be laid out.

Why the 50kW variant matters

The defining difference of this model is its combination of 50kW rated output, support for up to 75kWp of recommended PV array power and five MPPTs with two strings per tracker. That is a meaningful step up from the 40kW version and makes the inverter particularly attractive where commercial roofs are larger, more broken up or simply carrying more modules than four MPPTs would comfortably support.

That difference has real buying implications. A 50kW inverter can make better sense than installing more smaller units when the goal is to keep system architecture simpler and reduce balance-of-system complexity. At the same time, this model still sits below the 60kW version, which means buyers can choose it when the project is ambitious but does not yet demand the maximum size in the family.

Key features and practical benefits

• 50kW rated AC output for larger commercial and industrial PV systems
• Up to 75kWp recommended PV array input power
• Five MPPTs with two strings per tracker for more flexible array design
• 150% PV oversizing input and 110% overloading output
• 180 to 1000V MPPT range with 200V start-up voltage
• Maximum 32A PV input current and 46A short-circuit current per MPPT
• Built-in export power control and remote setting and upgrading
• Smart I-V curve diagnosis and smart string current monitoring
• Type II SPD on AC and DC sides, with optional AFCI, APS and PLC

Those features are valuable because they help the inverter align with current commercial system requirements rather than older, simpler PV designs. Five MPPTs provide better separation across multiple roof zones or grouped strings. The wide MPPT range and strong tracker current handling support present-day module classes. Export control and remote configuration make the inverter more practical where site management and monitoring expectations are higher.

Technical details that matter in practice

The X3-MEGA G2 50kW shares the same platform fundamentals as the rest of the range, including 1100V maximum PV input voltage, 600V nominal input voltage, 180 to 1000V MPPT voltage range and 200V start-up voltage. On the AC side, it is rated at 50kW with 55kVA maximum apparent power. Rated AC output current is 75.8A or 72.5A depending on grid voltage, and maximum AC output current is 83.3A or 79.7A. These figures place the inverter comfortably in higher-capacity commercial work, while still keeping it within a manageable single-inverter format.

Power factor range is 0.8 leading to 0.8 lagging, and THDi at rated power is below 3%. Maximum efficiency is 98.4% and European efficiency is 98.1%. Those numbers are commercially relevant because they show the unit is not only high-capacity but also built for efficient day-to-day operation. In projects where performance, grid behaviour and bankability all matter, those details help support specification confidence.

Monitoring, maintenance and system visibility

SolaX has clearly designed the X3-MEGA G2 family with operational visibility in mind. The 50kW model supports remote setting and upgrading, smart I-V curve diagnosis, smart string current monitoring, optional 24-hour operation monitoring and optional PLC. Communication interfaces are listed as RS485, USB and DRM, with optional monitoring dongles including Pocket WiFi, Pocket LAN and Pocket 4G. On a larger commercial site, these features are not nice-to-haves. They help reduce maintenance friction and make performance review much more efficient.

Night-time reactive power compensation is another useful platform feature. For some commercial installations, power behaviour outside straightforward daytime generation can still matter. This makes the 50kW model feel like a more complete system component rather than just a converter sized for higher output.

Protection and site robustness

Protection is strong across the X3-MEGA G2 family, and the 50kW version is no exception. Type II surge protection is included on both DC and AC sides, and the datasheet lists over and under voltage protection, over current protection, DC isolation protection, grid monitoring, DC injection monitoring, residual current detection, anti-islanding protection, string fault detection and over-temperature protection. Optional AFCI adds another layer where project requirements justify it.

IP66 ingress protection and smart fan cooling reinforce the model’s suitability for real commercial conditions. SolaX also states that advanced heat dissipation technology helps make the system more than 10% lighter and smaller. For installers, this is meaningful because high-output commercial hardware still needs to remain practical in plant rooms, external mounting positions and service zones.

Physical installation and fitment

The 50kW inverter measures 630 × 521 × 286 mm and weighs 44.5kg. Operating ambient temperature range is -30 to +60°C, with derating above 45°C, and maximum operating altitude is 4000m, with derating above 3000m. Relative humidity range is 0 to 100%. These are important numbers because they confirm that the product is intended for demanding commercial deployment rather than sheltered indoor-only environments.

Five MPPTs also change the fitment story. This inverter suits sites where roof layout is more fragmented or where different array groups benefit from clearer independent tracking. That is often the real reason to choose it over the 40kW version, even before output differences are considered.

Who this inverter suits best

The 50kW X3-MEGA G2 is best suited to larger commercial rooftops, warehouse and industrial buildings, agricultural PV projects and three-phase sites with substantial array capacity and more complex layout requirements. It is especially relevant where five MPPTs help keep design cleaner and where built-in export control, remote diagnostics and connected monitoring are important parts of the brief.

Compared with the 40kW model, it gives more DC headroom and one extra MPPT. Compared with the 60kW version, it is the more proportionate choice where the project is very large but does not need the maximum size in this family. That balance is what makes it so commercially useful.

Final view

SolaX X3-MEGA G2 50kW Three-Phase String Inverter is a highly capable commercial inverter that combines substantial output, five-MPPT design flexibility and strong operational features in one platform. With support for up to 75kWp PV input, 150% oversizing, 110% overloading output, Type II SPD on AC and DC, export power control, smart diagnostics and IP66 protection, it is a strong fit for larger three-phase commercial solar projects.

Loading delivery information...