SolaX X3-MEGA G2 50kW Three-Phase String Inverter

A higher-capacity commercial inverter with more tracking flexibility

SolaX X3-MEGA G2 50kW Three-Phase String Inverter is built for commercial and industrial projects where the system scale is clearly beyond mid-sized rooftop solar and where extra MPPT flexibility becomes just as important as extra output. It sits above the 40kW version in both capacity and layout freedom, giving buyers and installers a stronger option for more ambitious three-phase solar systems.

This matters because larger commercial roofs are often not simple, uniform spaces. As system size grows, the ability to split arrays across more trackers can be crucial to keeping the design clean and commercially sensible. The 50kW X3-MEGA G2 answers that need by combining higher power with five MPPTs and strong DC headroom.

Why the 50kW model is a meaningful step up

The biggest difference here is not just the jump in output. It is the combination of 50kW rated AC power, support for up to 75kWp of recommended PV input and five MPPTs with two strings per tracker. That gives the inverter much broader scope on larger or more segmented commercial roofs, where four MPPTs may start to feel restrictive.

For many commercial projects, this allows the system to stay within one well-specified inverter platform rather than being split across more units than necessary. That can help keep overall system architecture cleaner while still giving the design flexibility the roof actually needs.

Key specifications and what they mean

• 50kW rated three-phase output
• Up to 75kWp recommended PV input
• Five MPPTs with two strings per tracker
• 150% PV oversizing and 110% overload output
• 180 to 1000V MPPT range with 200V start-up voltage
• 32A maximum input current and 46A short-circuit current per MPPT
• Type II SPD on both AC and DC
• Built-in export power control
• Remote setting and upgrading support
• Smart I-V curve diagnosis and string current monitoring

Those figures make the inverter especially relevant to current commercial module classes and larger array layouts. The wider MPPT count is the clearest advantage, but the strong current handling and generous PV allowance also help ensure the inverter feels properly matched to modern commercial design rather than tied to older module expectations.

Monitoring, maintenance and commercial visibility

SolaX clearly designed the X3-MEGA G2 family for connected commercial operation, and the 50kW model reflects that. It supports remote setup and upgrading, smart diagnostics, string current monitoring and multiple communications paths. On a larger site, that matters because remote visibility and easier fault identification reduce service friction and help keep long-term performance management more efficient.

Export control is another major practical strength. On commercial projects, managing export is often an essential part of the job rather than a secondary extra. Built-in capability at inverter level helps streamline that side of the system and reduces the need for awkward add-on workarounds.

Protection, durability and installation

The 50kW X3-MEGA G2 includes Type II surge protection on both DC and AC sides, backed by a broader safety package that includes grid monitoring, anti-islanding protection, over-current protection, over-temperature protection and string fault detection. Optional AFCI support is available where the project requires it. These are the sorts of features expected on serious three-phase commercial hardware.

Physically, the inverter uses an enclosure of around 630 x 521 x 286 mm and weighs about 44.5kg. Smart fan cooling and IP66 ingress protection reinforce its suitability for demanding commercial conditions, whether mounted externally or in semi-exposed service areas where normal installation practice is followed.

Who it suits best

This inverter is best suited to larger commercial rooftops, industrial buildings, agricultural sites and other three-phase properties where the system needs more capacity and more tracker flexibility than the 40kW model offers. It is particularly attractive where five MPPTs make a real difference to roof segmentation or array grouping.

Compared with the 60kW version, it is the more proportionate choice when the project is very substantial but does not yet justify the maximum inverter size in the family. That balance is exactly what makes it commercially valuable.

Final view

SolaX X3-MEGA G2 50kW Three-Phase String Inverter is a highly capable commercial inverter that combines strong output, five-MPPT design flexibility and a well-developed monitoring and protection package. With support for up to 75kWp of PV input, 150% oversizing, 110% overload output, export control, Type II SPD on AC and DC and IP66 protection, it is a very strong option for larger three-phase commercial solar projects.