Fox ESS H3-PRO-25.0 25kW Three-Phase Hybrid Inverter

Name: Fox ESS H3-PRO-25.0 25kW Three-Phase Hybrid Inverter
SKU: H3-PRO-25.0
Price: 2183.48 GBP
Availability: InStock

£2183.48

The Fox ESS H3-PRO-25.0 is a high-capacity three-phase hybrid inverter built for larger UK homes, farms and light-commercial sites that need dependable output and flexible battery integration. A 3× MPPT design with a wide tracking window helps extract more energy from complex, multi-aspect arrays in typical British weather. The IP65 enclosure supports outdoor mounting, while advanced protections and grid features keep the system stable under heavy loads.

Engineered for high-voltage LFP storage and DC-coupled efficiency, the H3-PRO-25.0 pairs cleanly with Fox batteries and delivers responsive charge/discharge control. FoxCloud monitoring with built-in Wi-Fi/LAN (optional 4G) gives installers and owners full visibility, and standard interfaces (e.g. RS485, CAN, DRM, meter, USB) streamline commissioning. Safety certification to EN 62109 and suitability for UK G99 applications (subject to DNO approval) round out a robust, installer-friendly platform for modern photovoltaic systems.

Contact Evergy for product guidance or system compatibility support.

SKU: H3-PRO-25.0

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The Fox ESS H3-PRO-25.0 brings commercial-grade hybrid performance to larger residential and light-industrial photovoltaic systems. Offering a rated output of 25 kW AC, three independent MPPT trackers and wide-range voltage control, it delivers reliable, battery-ready power for the most demanding UK installations. Specification data verified from Fox ESS H3 PRO datasheet (v2.1 – November 2024).

High-Efficiency Performance for British PV Systems

Engineered with 3× MPPT inputs across a 150 – 850 V window (230 – 850 V at full load), the H3-PRO-25.0 keeps each string operating at its optimum point even under patchy sunlight or multi-aspect roofs. Peak efficiency reaches 97.8 % with 99.9 % MPPT tracking accuracy, while precise control electronics minimise conversion losses between the PV array, storage bank and three-phase supply. This ensures steady generation across variable light levels typical of the British climate.

Built for Reliability & Protection

A tough IP65 aluminium enclosure shields internal components from moisture and dust, while adaptive fan cooling maintains thermal stability under continuous high output. Integrated protection features include residual-current monitoring, insulation testing, anti-islanding logic and Type II AC/DC surge arrestors. Certified to EN 62109-1 / -2 and EMC IEC 61000-6-2 / -6-3, the H3-PRO-25.0 is fully compliant for G99 connection in the UK.

Key Features

25 kW three-phase hybrid inverter with 3× MPPT for complex arrays.
Wide 150 – 850 V MPPT window (230 – 850 V full load) for flexible string design.
Peak efficiency 97.8 % / MPPT accuracy 99.9 % for maximum energy yield.
IP65 weatherproof housing with intelligent fan cooling.
Dual HV LFP battery inputs (50 A + 50 A) for fast DC-coupled storage.
Integrated Wi-Fi & LAN plus optional 4 G via FoxCloud monitoring.
Comprehensive protection — RCM, insulation, anti-islanding and surge arrestors.

If you’re wondering how the H3-PRO-25.0 handles typical UK conditions, its broad MPPT range and high-speed tracking algorithm maintain strong output through cloudy days and low-light mornings, outperforming conventional inverters that lose efficiency when irradiance drops.

Specification data verified from Fox ESS H3 PRO documentation (v2.1 – November 2024).

Smart Monitoring & Installer-Grade Connectivity

The Fox ESS H3-PRO-25.0 combines advanced hybrid control with full-visibility monitoring through FoxCloud. Built-in Wi-Fi & LAN allow real-time oversight of generation, consumption, and battery performance, while optional 4 G modules support remote or off-grid locations. Standard communication ports — RS485, CAN, DRM, meter, and USB — ensure smooth integration with high-voltage Fox LFP batteries, smart meters, and building-energy-management systems. Automatic fault logging and firmware updates minimise site visits and make maintenance straightforward for installers.

Seamless Integration with Solar Panels & Battery Storage

Designed for direct DC coupling, the H3-PRO-25.0 works efficiently with solar panels and battery storage systems. Its dual 50 A inputs enable rapid charging and discharging across scalable LFP stacks, supporting large-site energy shifting and backup applications. Three independent MPPTs provide design flexibility on complex roofs or commercial canopies, while export-limiting and three-phase balancing maintain grid compliance under UK G99 rules.

Compact Design & Durable Construction

Delivering 25 kW from a compact footprint of 600 × 560 × 225 mm and around 52.5 kg, the IP65 aluminium enclosure withstands the British climate with ease. Adaptive fan-cooling keeps noise typically below 60 dB and electronics within safe thermal limits, ensuring long-term reliability whether wall-mounted indoors or in a sheltered outdoor position.

Installer Guidance & System Notes

String design & MPPT layout

Distribute arrays across all three MPPTs to separate orientations or shade profiles. Maintain each string between 150 and 850 V (230 – 850 V at full load) and keep within the manufacturer’s per-string current and short-circuit limits.

Battery configuration & sizing

Two high-voltage LFP inputs allow parallel stacks. Start with capacity suited to daily kWh usage and expand later — each channel supports up to 50 A charge/discharge for responsive energy storage.

Grid compliance & safety

Compliant with EN 62109-1 / -2 and IEC 61000-6-2 / -6-3 EMC standards. Integrated RCM, insulation monitoring, anti-islanding, and Type II AC/DC surge protection ensure safe G99 commissioning for UK installations.

Why We Recommend the Fox ESS H3-PRO-25.0

At Evergy, we recommend the H3-PRO-25.0 for projects that demand reliable 25 kW three-phase output, flexible string design and robust battery scalability. It delivers consistent performance, simple commissioning and trusted Fox ESS engineering — qualities valued by UK installers working on larger PV systems and agricultural or commercial sites.

Evergy is the renewable division of LAMPS Electrical — an independent UK wholesaler with over 15 years of trade experience.

Compare in the Fox H3 PRO Range

Model	Rated AC (W)	MPPTs	MPPT Window (V)	Max Eff.	Dimensions (mm)	Weight (kg)
H3-PRO-20.0	20 000	3	150 – 850 (230 – 850 full load)	97.8 %	600 × 560 × 225	≈ 52.5
H3-PRO-25.0	25 000	3	150 – 850 (230 – 850 full load)	97.8 %	600 × 560 × 225	≈ 52.5

Data based on Fox ESS H3 PRO datasheet (v2.1 – Nov 2024). Verify string limits during final design.

FAQs – Fox ESS H3-PRO-25.0

How does H3-PRO-25.0 differ from H3-PRO-20.0?

The 25 kW model offers higher AC output and PV capacity, making it ideal for larger arrays or small commercial applications requiring greater load support.

Is it compatible with Fox high-voltage LFP batteries?

Yes — the H3 PRO platform supports dual HV LFP battery inputs for fast DC-coupled charging up to 50 A per channel.

Can it be mounted outdoors?

Yes. The IP65 enclosure and fan-assisted cooling make it suitable for outdoor mounting in typical UK conditions.

How is performance monitored?

Performance data is available via FoxCloud through Wi-Fi or LAN, with optional 4 G modules for remote sites without broadband.

What are the dimensions & weight?

The unit measures 600 × 560 × 225 mm and weighs approximately 52.5 kg.

For expert product advice and compatibility guidance, contact Evergy — trusted UK supplier of Fox ESS inverters and premium solar equipment.

Attribute name	Attribute value
Dimensions	600 x 560 x 225 mm
Weight	57.5 kg
Warranty	10 Years
Rated Power	25,000 W
MPPT Quantity	3
DC Start-up Voltage	160 V
Protection Class	IP65 (Outdoor Use)
Integrated DC Switch	Yes

H3-PRO-25.0

FOX ESS

Fox ESS is a global leader in the development of inverter and energy storage solutions. Engineered by some of the world’s leading inverter and battery experts, their products offer advanced features, coupled with exceptional performance and reliability.

Free delivery -

NEXT DAY Delivery to Oxfordshire, Buckinghamshire and London via an EVERGY vehicle. Max of 1 ton weight.

Other delivery options via courier -

FREE NEXT DAY (*orders over £50, some batteries and inverters will require an additional fee) via FEDEX. Monday to Friday, up to 30kg, Max box size 50cm x 50cm x 50cm (volume). Orders must be received by 2pm.

Anytime NEXT DAY delivery – under £50 = £6.50 (depending on location, weight and size)

Regardless of spend, additional to any of the above charges –

Before noon (FedEx Priority Express) = Guide Price £15.00 (calulated at checkout)

Before 10am (FedEx First) = Guide Price £20.00 (calulated at checkout)

Delivery of pallets -

Palletised deliveries – Prices starting at £58

Multiple pallet orders can be quoted upon request (price dependent on number of pallets and postcode area)

Special delivery items may vary (non-stock products).

SAME DAY COLLECTION - Click & collect from Evergy Stores (Thame, Oxfordshire).

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