The Knox 50kW G2 On-Grid Solar Inverter, also identified as the ASW 50K-LT-G2, is a powerful three-phase solar inverter developed for high-capacity grid-connected solar installations. It is designed to convert the DC electricity generated by solar panels into usable AC electricity that can be supplied to commercial facilities, industrial buildings, offices, agricultural operations, and other large-scale energy consumers.

For businesses looking to reduce dependence on conventional grid electricity and make better use of their solar generation, choosing an efficient and reliable inverter is essential. The Knox 50kW G2 combines high conversion efficiency, flexible PV input capabilities, multiple MPP inputs, advanced protection functions, and a durable IP65 enclosure to support dependable long-term solar system operation.

According to the available technical documentation, the inverter supports a maximum PV array power of 75,000 Wp under STC and has a maximum DC input voltage of 1100V. Its MPP voltage range extends from 200V to 1000V, providing flexibility when designing a high-capacity solar array.

High 50kW Rated Output

The Knox 50kW G2 is designed to provide a rated AC output of 50,000 watts, making it suitable for commercial and industrial solar projects where substantial power generation is required.

A 50kW inverter can serve as an important component in larger solar installations, helping businesses convert significant amounts of solar energy into usable electricity. Its three-phase configuration also makes it suitable for applications where three-phase electrical infrastructure is required.

Whether installed in a commercial building, manufacturing facility, warehouse, educational institution, agricultural facility, or other large electricity-consuming location, the inverter provides a practical solution for connecting solar generation to the electrical grid.

Up to 98.6% Maximum Efficiency

One of the most important characteristics of a solar inverter is its ability to convert available solar energy with minimal conversion losses. The Knox 50kW G2 offers a maximum efficiency of up to 98.6%, while the published European efficiency is approximately 98.3%.

High conversion efficiency can help a solar installation make better use of the energy produced by its photovoltaic panels. For commercial and industrial systems, where the solar array may generate substantial amounts of electricity throughout the year, efficient power conversion can contribute to improved overall system performance.

Supports Up to 75kWp Solar PV Capacity

The inverter can accommodate a maximum PV array power of 75kWp under standard test conditions, providing flexibility for solar system designers to pair the inverter with a suitably sized photovoltaic array.

This higher DC input capacity makes the Knox 50kW G2 particularly useful for projects where maximizing solar generation during available sunlight hours is a priority.

The actual PV array configuration should always be designed according to the inverter's electrical limits, solar panel specifications, local installation requirements, and professional system-design calculations.

Wide MPPT Voltage Range

The Knox 50kW G2 provides an MPP voltage range of approximately 200V to 1000V, with a rated input voltage of 630V. Its maximum DC input voltage is 1100V.

This broad operating range provides greater flexibility when configuring solar panel strings. It can help system designers develop appropriate string configurations while maintaining the required operating voltage for efficient energy harvesting.

A wide MPPT range is particularly useful in larger solar installations because the operating voltage of photovoltaic strings changes according to factors such as sunlight conditions and module temperature.

Five Independent MPP Inputs

The inverter features five independent MPP inputs with two strings per MPP input, according to the published technical data.

Multiple MPPT inputs can provide greater flexibility when solar panels are installed across different roof sections or orientations. When properly designed, separate MPPT channels can help the system manage different string operating conditions more effectively.

This makes the Knox 50kW G2 a suitable choice for complex commercial rooftops and solar installations where panel orientations, shading conditions, or available installation areas may vary.

Reliable Three-Phase Grid Connection

The Knox 50kW G2 is designed for three-phase grid-connected applications. Its documented AC nominal voltage options include 220/380V and 230/400V, while the maximum output current is listed at 80A.

The inverter can operate across specified grid voltage and frequency ranges, giving it flexibility for compatible electrical systems. Its rated power factor is listed as 1, with adjustable displacement power factor capability from 0.8 overexcited to 0.8 underexcited.

Advanced Protection Features

Safety is an essential part of any large solar installation. The Knox 50kW G2 incorporates multiple protection functions designed to help protect the inverter and connected electrical system.

Published specifications include:

• DC reverse-polarity protection
• DC disconnection
• DC surge protection
• AC surge protection
• Leakage-current protection
• Insulation-impedance detection
• Residual-current protection
• Anti-islanding protection
• Grid monitoring
• Ground-fault monitoring

The inverter is also listed with protection according to IEC 62109-1 and other applicable standards and certifications.

These protection systems can help improve operational safety and provide additional safeguards against common electrical faults.

IP65 Protection for Demanding Installations

The Knox 50kW G2 features an IP65-rated enclosure, helping protect the inverter against dust ingress and water jets from different directions when properly installed.

Its documented operating temperature range is -25°C to +60°C, making the unit suitable for a broad range of environmental conditions when installed according to manufacturer requirements.

For outdoor or semi-outdoor commercial installations, the robust enclosure and wide temperature range can be valuable characteristics. Proper placement, ventilation, clearance, and installation practices remain important for maintaining reliable performance.

Transformerless Design and Active Cooling

The Knox 50kW G2 uses a transformerless topology, helping provide a compact and efficient inverter architecture. The published specifications also identify active cooling as its cooling concept.

Active cooling can assist with thermal management during periods of higher operating load. This is particularly relevant for commercial and industrial solar systems where the inverter may operate at substantial power levels for extended periods.

Smart Monitoring and Communication

Monitoring is an important part of managing a modern solar energy system. The Knox 50kW G2 supports communication through Wi-Fi and RS485, with LED indicators for status, fault, and communication information.

These communication options can support system monitoring and help users or installers keep track of inverter operation. Depending on the installation configuration and compatible monitoring equipment, system information can be accessed for performance management and troubleshooting.

Low Night-Time Self-Consumption

The inverter's published specifications indicate less than 1W self-consumption at night.

Low standby consumption helps minimize the amount of electricity used by the inverter when solar generation is unavailable. This complements the overall efficiency-focused design of the system.

Suitable Applications

The Knox 50kW G2 On-Grid Solar Inverter can be considered for a variety of larger solar applications, including:

• Commercial solar power systems
• Industrial solar installations
• Factory and manufacturing facilities
• Warehouses and distribution centers
• Agricultural and farm-based solar systems
• Large offices and commercial buildings
• Educational and institutional facilities
• Shopping and retail facilities
• Large rooftop solar projects
• Grid-connected photovoltaic installations

The final suitability of the inverter depends on the project's electrical infrastructure, PV array design, grid requirements, and applicable local regulations.

Key Benefits of Knox 50kW G2 On-Grid Solar Inverter

1. High Conversion Efficiency
With maximum efficiency of up to 98.6%, the inverter is designed to convert solar DC power into AC electricity efficiently.

2. High PV Capacity
Support for up to 75kWp PV array power provides flexibility for larger solar installations.

3. Wide MPPT Range
The 200V–1000V MPP voltage range allows flexible solar string design.

4. Multiple MPPT Inputs
Five independent MPP inputs provide flexibility for installations with different panel orientations or string configurations.

5. Strong Safety Protection
Multiple DC and AC protection functions help safeguard the system against electrical faults.

6. Durable IP65 Construction
The IP65 enclosure supports reliable operation in suitable outdoor and industrial environments.

7. Wide Operating Temperature Range
The documented -25°C to +60°C operating range supports use across demanding environmental conditions.

8. Smart Communication
Wi-Fi and RS485 communication options support monitoring and system management.

9. Three-Phase Commercial Performance
Its 50kW three-phase output makes it suitable for larger grid-connected solar applications.

10. Low Standby Consumption
Less than 1W night-time self-consumption helps minimize unnecessary energy use.

Technical Specifications

Specifications are based on available manufacturer/distributor technical documentation and may vary by revision or market.

Conclusion

The Knox 50kW G2 On-Grid Solar Inverter is a high-capacity solution for commercial and industrial solar projects that require efficient DC-to-AC conversion, flexible PV configuration, robust protection, and dependable grid integration. With a 50kW rated output, support for up to 75kWp of PV capacity, five independent MPP inputs, a wide MPPT voltage range, up to 98.6% efficiency, IP65 protection, and multiple monitoring and safety functions, it offers a strong combination of performance and flexibility.

For businesses planning a large solar installation, the Knox 50kW G2 can be an effective choice when the system is correctly sized and professionally designed around the site's electrical requirements. Its high efficiency, multiple MPPT channels, durable construction, and advanced protection features make it well suited to demanding grid-connected photovoltaic applications.