Fox ESS H3 PRO 15kW Commercial 3-Phase Hybrid Inverter

  
By Fox ESS
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Fox ESS H3 Pro 15 kW 3‑Phase Hybrid Inverter

  • Three‑phase hybrid design combining PV and high‑voltage battery storage in one unit, well suited to commercial and light industrial loads.
  • Scalable system architecture with support for battery expansion and up to ten storage inverters in parallel, allowing future growth as site demand increases.
  • IP65‑rated enclosure with remote monitoring via app and web portal, making it practical for outdoor plant rooms and exposed UK locations.

Product overview

The Fox ESS H3 Pro 15 kW Three‑Phase Hybrid Inverter is part of the H3 Pro Series, designed for sites that need both solar generation and high‑voltage battery storage on a three‑phase supply. It combines PV, battery and grid interaction in a single IP65‑rated unit, with flexible configuration and built‑in protection.

When paired with compatible Fox high‑voltage batteries, the H3 Pro 15 kW can support applications such as small warehouses, workshops, logistics depots and commercial offices requiring self‑consumption, peak‑shaving and backup capability. Installation must be carried out by a suitably qualified electrician or solar installer.

Key Features 

  • Three‑phase hybrid operation with up to 15 kVA nominal AC power and support for high‑voltage batteries, covering a wide range of commercial loads.
  • High DC input capability with multiple MPPT trackers and wide MPPT voltage windows, enabling flexible array design across different roof aspects.
  • IP65 protection rating and wall‑mount design with smart fan cooling, suitable for indoor or outdoor installation in UK conditions.
  • Integrated remote monitoring via smartphone app or web portal, plus communication interfaces including Wi‑Fi, 4G (optional), DRM, USB, CAN and RS485.
  • Advanced protection features including anti‑islanding, over‑current and over‑temperature protection, insulation monitoring and AC/DC surge protection.

Technical Specifications

The following values are taken from the Fox ESS H3 Pro Series datasheet (Version 1.6, 2023‑11‑22) for the H3‑Pro‑15.0 model. Always confirm against the latest official documentation before design or installation.

  • Hybrid inverter model: H3‑Pro‑15.0.
  • AC inverter model: AC3‑Pro‑15.0.
  • Rated AC power (H3‑Pro‑15.0): 15000 VA.
  • Max. apparent AC power (H3‑Pro‑15.0): 16500 VA.
  • Max. AC power (series table): 22500 VA.
  • Rated grid voltage (AC voltage range): 400 / 230 V; 380 / 220 V, 3L / N / PE.
  • Rated grid frequency: 50 / 60 Hz, ±5.
  • Max. AC current (per phase): 25.0 A.
  • Power factor: 1 (adjustable from 0.8 leading to 0.8 lagging).
  • Export control: Yes.
  • THDI: <3 % @ rated power.
  • Battery type: Lithium battery.
  • Battery voltage range: 150 V – 800 V.
  • Full AC load battery voltage: 160 V – 790 V.
  • Max. charge/discharge current: 50 A + 50 A.
  • Number of battery inputs: 2.
  • Battery communication interface: CAN.
  • Max. recommended DC power: 15000 W per MPP (note in datasheet).
  • Max. DC voltage: 1000 V (for 1000 V system, maximum operating voltage 950 V; PV input >955 V will report PV overvoltage error – note ).
  • Nominal DC operating voltage: (see series table; typical PV operating window defined by MPPT range).
  • Max. input current: value per datasheet table for H3‑Pro‑15.0 (refer to official document).
  • Max. short‑circuit current: value per datasheet table for H3‑Pro‑15.0 (refer to official document).
  • MPPT voltage range: 170 V – 850 V (series table for H3‑Pro‑15.0 / AC3‑Pro‑15.0).
  • MPPT voltage range (full load): 160 V – 790 V (H3‑Pro‑15.0).
  • Start‑up voltage: 150 V (series value).
  • Number of MPPT trackers: 2.
  • Strings per MPPT tracker: 2.
  • EPS max current (per phase): 22.7 A (H3‑Pro‑15.0).
  • Max apparent AC power (EPS): 15000 VA.
  • Peak apparent AC power (60 s, EPS): 18000 VA.
  • THDV: <45 % (EPS output section).
  • MPPT efficiency: 99.90 %.
  • Max. efficiency: 97.80 %.
  • Max. battery‑to‑AC efficiency: 97.60 %.
  • Max. PV‑to‑battery efficiency: 98.10 %.
  • Euro efficiency: 97.30 %.
  • PV reverse polarity protection: Yes.
  • Battery reverse protection: Yes.
  • Anti‑islanding protection: Yes.
  • Output short protection: Yes.
  • Leakage current protection: Yes.
  • Insulation resistor detection: Yes.
  • Over‑voltage category: III (AC side), II (DC side).
  • Reverse connect protection: Yes.
  • Over‑current / over‑temperature protection: Yes.
  • AC/DC surge protection: Type II / Type II.
  • AFCI protection: Optional.
  • DC switch: Optional.
  • String monitoring function: Optional.
  • Dimensions (W × H × D): 600 mm × 560 mm × 225 mm.
  • Packing dimensions (W × H × D): 720 mm × 680 mm × 370 mm.
  • Net weight: 52.5 kg.
  • Gross weight: 57.5 kg.
  • Installation: Wall‑mounted.
  • Operating temperature range: −25 °C to +60 °C (derating at 45 °C).
  • Storage temperature: −40 °C to +70 °C.
  • Noise emission (typical): <60 dB (series values).
  • Storage/operation relative humidity: 0–95 % (without condensation).
  • Altitude: <4000 m.
  • Protective class: II.
  • Ingress protection: IP65 (for outdoor use).
  • Standby consumption: 200 W for hot standby, 18 W for cold standby.
  • Idle mode: Yes.
  • Cooling: Smart fan cooling.
  • Inverter topology: Non‑isolated.
  • Communication interfaces: Meter, Wi‑Fi, 4G (optional), DRM, USB, BMS (CAN), RS485.
  • LCD display: Backlight 16 × 4 character.
  • Buttons: Capacitive touch sensor × 4.
  • Buzzer: 1, inside (EPS & Earth fault).
  • Parallel operation: Yes, at max 10 PCS.
  • Switch time: 0 ms (EPS output section).
  • Safety standards: EN 62109‑1, EN 62109‑2.
  • EMC standards: IEC 61000‑6‑2, IEC 61000‑6‑3.

Documents available for download

Please review the latest Fox ESS documentation before specifying, installing or commissioning the Fox ESS H3 Pro 15 kW Three‑Phase Hybrid Inverter.

Shipping and availability

We ship the Fox ESS H3 Pro 15 kW Three‑Phase Hybrid Inverter to the UK, Ireland, Africa, the Caribbean and worldwide. If a 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

Energian offers UK‑based expert support for Fox ESS three‑phase hybrid systems. Contact us by phone, email or live chat if you need help with system sizing, compatibility checks or project design, or if you would like to visit our office for an in‑person consultation.

As this inverter forms part of a larger PV and battery system rather than an out‑of‑the‑box product, we strongly recommend installation and commissioning via our trusted professional partners or your chosen qualified installer. We can work directly with your contractor to ensure the Fox ESS H3 Pro 15 kW, batteries and protection equipment are configured safely and in line with Fox ESS guidance and local regulations.