Fox ESS H3 PLUS 125kW 3‑Phase Hybrid Inverter Key benefits 125kW three‑phase hybrid inverter for large commercial and industrial sites combining high‑voltage LFP batteries with substantial PV capacity. Designed for long backup capability, fast EPS switchover and 100% unbalanced three‑phase output to support critical loads on complex three‑phase supplies. Integrated with FoxCloud V2.0 for advanced remote monitoring and system management across multi‑inverter and multi‑battery installations. Brief description The Fox ESS H3 PLUS 125kW Commercial 3‑Phase Hybrid Inverter sits at the top of the H3 Plus range, which spans from 50kW to 125kW for commercial applications. It supports high‑voltage LFP battery stacks, long backup runtimes and less than 10ms EPS switching, making it suitable for logistics hubs, production lines, data rooms and other sites where continuity of supply matters. With a wide DC voltage window, high efficiency and IP65 construction, it is well suited to indoor plant rooms or sheltered outdoor installations. Key features Three‑phase hybrid inverter with 125kW nominal AC power and up to 137.5kVA AC output on the H3‑125‑Plus model. High‑voltage LFP battery support (180–950V) with up to 240A charge/discharge across three battery ports (80A + 80A + 80A). PV input up to 250kW with 8 MPPTs and two strings per tracker for flexible commercial array design. EPS function with less than 10ms switching time, 155kVA EPS rating and 300A LRA for starting demanding loads. Colour LCD display plus LED/Wi‑Fi app interface via FoxCloud V2.0 for local and remote visibility. Technical specifications PV input Max. Array Power [kW] 250 (H3‑125‑Plus) Max. Input Power [kW] 250 (H3‑125‑Plus) 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 8 (H3‑125‑Plus) Strings per MPP Tracker 2 (all models) 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 (on‑grid) Model H3‑125‑Plus Nominal AC Power [kW] 125 Max. AC Output Power [kVA] 137.5 Rated AC Output Current (Per Phase) [A] 189.9 Max. AC Output Current (Per Phase) [A] 198.5 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] 155 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] 7301060305 Weight [kg] 115 (H3‑50‑Plus/H3‑60‑Plus); 120 (H3‑75‑Plus/H3‑80‑Plus/H3‑100‑Plus/H3‑125‑Plus) 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 [email protected] for a tailored shipping quote. UK expert support UK expert support is available to help with system design, battery sizing and integration of the Fox ESS H3 PLUS 125kW Commercial 3‑Phase Hybrid Inverter into your project. For large commercial and industrial systems we recommend installation and commissioning through our trusted partners to ensure compliance with local grid codes and safe operation of high‑voltage PV and battery equipment. You can contact us via phone, email or live chat, or visit our office for an in‑person consultation to discuss your site requirements and hybrid system configuration. Documents available for download Fox ESS H3 Plus datasheet (includes H3‑125‑Plus) Fox ESS H3 Plus installation / user manual
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