Fox ESS H3 Plus 208/220/240V Three-Phase Hybrid Inverter 37.5kW–70kW | 220V Commercial Solar Inverter | LiFePO4 Battery Ready | Grid-Tied & Off-Grid Backup | WiFi Monitoring

PRE-ORDER SALE - Estimated November 2026 Arrival DOWNLOADS: Datasheet Certifications are pending and estimated for Nov 2026 The Fox ESS H3 Plus 208/220/240V Three-Phase Hybrid Inverter is a high-performance energy solution engineered for commercial and large-scale residential solar installations. Designed with advanced hybrid technology, it seamlessly integrates solar generation, battery storage, and grid interaction to maximize energy efficiency and system reliability. With power ratings ranging from 37.5kW to 70kW, this inverter is ideal for demanding applications requiring stable, scalable, and intelligent energy management. Its ability to support 100% unbalanced three-phase output makes it particularly suitable for commercial loads with varying phase demands. The H3 Plus features EPS (Emergency Power Supply) functionality with ultra-fast switching (<10ms), ensuring critical systems remain powered during grid outages. When paired with compatible high-voltage LiFePO4 batteries (not included), it enables long-duration backup power, exceeding 6 hours depending on system configuration. Equipped with FoxCloud V2.0 monitoring, users gain full visibility and control over system performance through WiFi, LAN, Bluetooth, or optional 4G connectivity. Installers benefit from flexible communication ports and advanced diagnostics, simplifying commissioning and maintenance. Built for durability, the inverter features NEMA 4X protection, smart air cooling, and robust safety mechanisms including surge protection, AFCI, and ground fault detection, making it suitable for both indoor and outdoor installations. KEY FEATURES: High-Power Commercial Hybrid Inverter Available in 37.5kW, 50kW, 60kW, and 70kW models, designed for large residential, commercial, and industrial solar systems with high efficiency and scalable energy management. Battery-Ready (No Battery Included) Supports high-voltage LiFePO4 battery systems (180-700V) for energy storage and backup power. Battery not included, compatible with multiple HV battery solutions. Grid-Tied + Off-Grid Backup (EPS) Seamlessly operates in grid-tied or off-grid mode with <10ms switching time, ensuring uninterrupted power during outages. Smart Monitoring with FoxCloud Built-in WiFi, LAN, Bluetooth, and optional 4G enable real-time monitoring, remote diagnostics, and system optimization via mobile app. Advanced Three-Phase Output Supports 100% unbalanced three-phase loads, delivering stable and reliable power for complex commercial applications. TECHNICAL SPECIFICATIONS Specification Details Models Available H3-37.5-Plus-US-L (37.5kW) H3-50-Plus-US-L (50kW) H3-60-Plus-US-L (60kW) H3-70-Plus-US-L (70kW) Max PV Power 75kW-140kW MPPT Voltage Range 180-700V Max Input Voltage 850V MPPT Trackers 4 / 8 (model dependent) Battery Type LiFePO4 (High Voltage) Voltage Range 180-700V Max Charge/Discharge Current 240A Battery Communication CAN Nominal Voltage 208V / 220V / 240V Frequency 50/60Hz Power Factor 0.8 leading to 0.8 lagging Max Efficiency 97.7% Switching Time <10ms Backup Duration 6+ hours (depending on battery) Dimensions 730 × 1060 × 305 mm Cooling Smart Air Cooling Noise Level <70dB Protection Rating NEMA 4X Operating Temp -30°C to 60°C Communication WiFi, LAN, Bluetooth, RS485, USB Optional 4G FoxCloud Monitoring App IMPORTANT NOTES: ⚠️ Battery not included – inverter is battery-ready and requires a compatible HV battery system ⚠️ Professional installation recommended for three-phase systems ⚠️ Designed for commercial and large residential applications