Fox ESS H3 PLUS 125kW Commercial 3-Phase Hybrid Inverter

  
By Fox ESS
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Fox ESS H3 PLUS 50kW  3‑Phase Hybrid Inverter

Key benefits

  • 50kW three‑phase hybrid inverter for commercial and industrial solar plus storage systems, supporting PV and LiFePO₄ battery integration in one unit.
  • Designed for long backup capability with fast EPS switchover, helping keep key loads running during power cuts in warehouses, depots and commercial facilities.
  • Advanced monitoring with FoxCloud V2.0, plus multiple communication ports for easy integration into existing energy management and BMS setups.

Brief description

The Fox ESS H3 PLUS 50kW Commercial 3‑Phase Hybrid Inverter is a high‑capacity solution for sites that want to combine rooftop or ground‑mount solar with battery storage on a three‑phase supply. It supports unbalanced three‑phase outputs, long backup runtimes and fast EPS switching, making it well suited to logistics centres, light manufacturing, office buildings and business parks where uptime matters. With IP65 protection, smart air cooling and remote monitoring via FoxCloud V2.0, it is designed for demanding commercial environments and ongoing performance tracking.

Key features

  • Three‑phase hybrid inverter, 50kW nominal AC power with up to 55kVA AC output and EPS support.
  • PV input up to 100kW array power with four MPPTs and two strings per tracker for flexible array layouts.
  • Compatible with high‑voltage LFP (LiFePO₄) batteries, supporting 180–950V and up to 240A charge/discharge across three battery ports.
  • Supports 100% unbalanced three‑phase output and less than 10ms EPS switching time for sensitive loads.
  • Integrated LED/LCD interface plus USB, RS485, Bluetooth, Wi‑Fi+LAN, optional 4G and CAN communication for monitoring and control.

Technical specifications 

General

Model H3‑50‑Plus
Version Version2.6 | 2025/08/26
Product type H3 Plus three‑phase hybrid inverter

PV input

Max. Array Power [kW] 100
Max. Input Power [kW] 100
Withstand Voltage [V] 1000
Input Voltage Range [V] 180 ~ 950
Max. MPPT Input Current [A] 40
Max. MPPT Short Circuit Current [A] 50
MPPT Voltage Range [V] 180 ~ 850
Start‑up Voltage [V] 180
No. of MPP Trackers 4
Strings per MPP Tracker 2

Battery specification

Battery Type LFP (LiFePO₄)
Voltage Range [V] 180 ~ 950
Max. Charging/Discharging Current [A] 240 (80+80+80)
Battery Port 3
Communication CAN*3

AC output

Nominal AC Power [kW] 50
Max. AC Output Power [kVA] 55
Rated AC Output Current (Per Phase) [A] 76
Max. AC Output Current (Per Phase) [A] 83.6
Nominal AC Voltage [V] 380/400, 3W+N+PE or 3W+PE
AC Voltage Range [Un] 0.8 ~ 1.2
Nominal AC Frequency [Hz] 50/60
Frequency Range [Hz] 50/60, ±5
Power Factor 0.8 Leading ~ 0.8 Lagging
THDi [%] <3 @Rated Power

AC input

Max. AC Input Power [kVA] 207
Max. Bypass Current [A] 300
Nominal AC Voltage [V] 380/400, 3W+N+PE or 3W+PE
Frequency Range [Hz] 50/60, ±5

EPS output (load)

Max. AC Output Power [kVA] 55
Peak AC Output Power [kVA] (10s) 155
LRA Current [A] 300
Nominal AC Voltage [V] 380/400, 3W+N+PE or 3W+PE
Nominal AC Frequency [Hz] 50/60
Switching Time [ms] <10
THDv [%] <3 @Rated Power

Efficiency

European Efficiency [%] 98.1
Max. Efficiency [%] 98.5

Protection

DC Input Switch Yes
Battery Reverse Polarity Yes
PV Reverse Polarity Yes
AC Overcurrent Protection Yes
AC Output Short Circuit Protection Yes
AC/DC Surge Protection Class II
ISO Detection Yes
Residual Current Detection Yes
Ground Fault Detection Yes
AFCI Yes
Terminal Overtemperature Protection Yes
String Current Detection Yes

General specification

Dimensions (WHD) [mm] 730 X 1060 X 305mm
Weight [kg] 115
Operating Temperature [°C] -30 ~ 60
Cooling Method Smart Air Cooling
Operating Altitude [m] 4000
Humidity [%] 0 ~ 100
Noise [dB] <70
Standby Consumption [W] <60
DC‑Link EV Charger Ready [kW] 20 ~ 50
Ingress Protection (IP) Rating IP65
Topology Non‑Isolation
Display LED, LCD, Wi‑Fi+APP
Communication Ports USB / RS485 / Bluetooth / Wi‑Fi+LAN / 4G(Optional) / CAN

Shipping

Shipping is available to the UK, Ireland, Africa, the Caribbean and worldwide. If the shipping rate is not shown at checkout, please contact us on +44 2080640335 or info@energian.co.uk for a tailored quote.

UK expert support

UK expert support is available to help with product selection, system design and technical queries around the Fox ESS H3 PLUS 50kW Commercial 3‑Phase Hybrid Inverter. For most commercial projects we recommend installation and commissioning via our trusted partners to ensure compliance with local electrical standards and correct integration with PV, batteries and backup loads.

You can reach us by phone, email or live chat, or visit our office for an in‑person consultation about your project requirements and system configuration.

Documents available for download