Fox ESS V3-50.0 50kW Three Phase Solar Inverter

Fox ESS V3-50.0: The Scalable Powerhouse Inverter for Large Commercial Solar

Designed for high-demand commercial sites and large three-phase solar systems, the Fox ESS V3-50.0 inverter brings together robust 50kW output, intelligent string monitoring, and peak efficiency performance. Whether you’re powering warehouses, agricultural buildings or industrial estates, it delivers the control, safety and conversion you need to maximise every kilowatt-hour.

Outstanding Efficiency with Multi-MPPT Control

The V3-50.0 features four independent MPPT trackers, allowing installers greater layout flexibility and system balancing across diverse rooftop orientations. According to the datasheet, it achieves up to 98.7% conversion efficiency with a wide MPPT voltage range of 550V to 800V , ensuring excellent performance even on overcast days or under variable loads.

• Max. AC output power of 55kW with support for large solar arrays
• Input voltage range of 200–1000V with 4 MPPTs / 2 strings per MPPT
• Euro efficiency rated at 98.4% for real-world output

Durability Built for Demanding Environments

The IP66-rated enclosure ensures the V3-50.0 operates flawlessly in harsh outdoor settings, with C5-rated anti-corrosion protection and a fan-based smart cooling system. From coastal sites to industrial rooftops, it withstands the elements with minimal maintenance.

• Operates in temperatures from -30°C to +60°C
• Protected against dust, water ingress and salt corrosion
• Smart air cooling for enhanced thermal regulation

String-Level Safety, Diagnostics and Arc Protection

This inverter incorporates intelligent string current sampling and fault detection, with the ability to diagnose underperformance or abnormalities in real time. Its integrated AFCI (Arc Fault Circuit Interrupter) responds instantly to dangerous arcing conditions, reducing fire risks significantly.

• Advanced PV string monitoring and auto-reporting
• AFCI arc fault protection with fast shutdown
• PID recovery system helps extend solar panel lifespan

Comprehensive Protection & Grid Compliance

The Fox ESS V3-50.0 is engineered with multiple protection layers including DC reverse polarity, overcurrent protection, and insulation monitoring. It’s also fully compliant with EN50549-1 for grid integration in the UK and comes with optional features like 4G connectivity and PID recovery to support long-term system stability.

• AC and DC Type II surge protection as standard
• Residual current and insulation monitoring built-in
• Compatible with smart meters and grid monitoring systems

Why Evergy Recommends This Product

The V3-50.0 is perfect for commercial installers and facilities managers who demand scale, safety, and high uptime from their solar investments. It combines smart diagnostics with industry-leading efficiency to help your installation run better for longer.

• Designed for large commercial buildings and solar farms
• Supports complex multi-roof or east-west string layouts
• Pairs well with our AC-coupled battery systems and high-output panels

Ideal for Industrial-Scale Solar Systems

The V3-50.0 inverter is ideally suited for large commercial buildings, agricultural operations, business parks or renewable developers seeking cost-effective power conversion at scale.

Key Technical Specifications

• Rated Output Power: 50kW (three-phase)
• Max Efficiency: 98.7%
• Dimensions: 583 × 460 × 270 mm
• Weight: 50.42 kg

For full technical information, see the specification tab or datasheet.

Build Your Complete System

Complete your solar installation with mounting systems, optimisers and our range of solar inverters. You can also explore related guidance in our solar system guide and funding overview.

FAQs

Q: Can I use the V3-50.0 with a battery system?
A: Yes – while not a hybrid inverter, it can be used with AC-coupled storage systems for increased flexibility.

Q: Does this unit require regular maintenance?
A: Minimal maintenance is needed. The fan cooling system is automatic, and string monitoring helps alert you to any issues.