Fox ESS R100 100kW Three-Phase Commercial Solar Inverter

Fox ESS R100: The High-Capacity Inverter for Demanding Commercial Solar Projects

Designed for high-performance commercial PV installations, the Fox ESS R100 delivers a powerful 100kW output with intelligent control across nine MPPT trackers. Whether you're overseeing a business park, logistics centre, or solar farm, this inverter provides the scale, safety, and efficiency to power it all , reliably and profitably.

Maximum Yield with Nine MPPT Inputs

The R100 provides exceptional string flexibility through its 9 independent MPPTs, each supporting 2 strings. This allows for optimised layout configurations across large rooftops, multiple orientations, or tracking systems. According to the datasheet, the inverter operates at up to 98.6% efficiency, with a working MPPT voltage window from 550V to 850V , ideal for sustained yield even under fluctuating solar conditions.

• 100kW nominal output and 1100V max DC input voltage
• MPPT voltage range of 200V–1000V with 98.2% European efficiency
• Perfect for complex string layouts across large-scale sites

Durable Engineering for Harsh Environments

This inverter is built to operate in challenging commercial settings. It is fully IP66-rated for dust and water ingress, C5-rated for anti-corrosion (including coastal and industrial sites), and operates efficiently from -30°C to +60°C. A smart fan cooling system maintains stability under load without excessive maintenance.

• Heavy-duty construction for industrial and agricultural locations
• Smart air cooling with fan control and heat management
• Protected against salt spray, dust, humidity and extreme temperatures

Real-Time Monitoring and Intelligent Fault Detection

Fox ESS has equipped the R100 with full PV string current monitoring and diagnostic capabilities. Real-time alerts help site managers identify string-level issues or performance deviations instantly. Safety is further enhanced by built-in AFCI for arc fault protection and PID recovery to prolong panel lifespan and minimise degradation.

• Live PV performance data with diagnostic alerts
• AFCI shuts down arcing threats to prevent electrical fires
• PID recovery actively restores lost panel efficiency over time

Advanced Protection and Full Grid Compliance

The R100 is engineered for grid-tied commercial use, with built-in protections covering every key area , including insulation monitoring, AC short-circuit protection, DC reverse polarity detection, and residual current monitoring. According to the datasheet, it meets EN50549-1 standards, making it suitable for commercial export applications across the UK and Europe.

• EN50549-1 compliant for safe grid integration
• Type II surge protection on both AC and DC sides
• Compatible with commercial smart meters and monitoring platforms

Why Evergy Recommends This Product

The R100 is our go-to choice for commercial clients needing absolute reliability and scale. It offers best-in-class MPPT flexibility, layered safety features, and robust outdoor resilience , perfect for multi-building setups, solar farms or retrofit upgrades.

• Optimised for developers, EPCs, and high-output solar sites
• Built to complement high-wattage solar panels and AC-coupled battery storage
• Part of the R Series family – see the R75 and R110 models for other capacities

Designed for Large Commercial Infrastructure

This inverter is ideal for solar installations on warehouses, logistics centres, commercial farms, factories, or multi-inverter systems. Its scale and adaptability make it perfect for sites with complex electrical or architectural needs.

Key Technical Specifications

• Rated Output Power: 100kW (three-phase)
• Maximum Efficiency: 98.6%
• Dimensions: 975 × 630 × 360 mm
• Weight: 90 kg

See the datasheet for full technical breakdown.

Explore Compatible Solutions

For a complete system, pair the R100 with our best-selling solar mounting kits, advanced optimisers and meters, and high-performance three-phase inverters. You can also explore how to fund your project through our latest article on solar panel grants.

FAQs

Q: Can the R100 be used in coastal or industrial zones?
A: Yes , it features C5 anti-corrosion protection and is IP66 rated for harsh environments.

Q: Is this inverter suitable for battery systems?
A: While the R100 is not a hybrid model, it integrates easily with AC-coupled battery storage systems for grid balancing and load shifting.