Fox ESS T6-G3 6kW Three-Phase String Inverter

Name: Fox ESS T6-G3 6kW Three-Phase String Inverter
SKU: T6-G3
Price: 586.47 GBP
Availability: InStock

£586.47

The Fox ESS T6-G3 6kW three-phase string inverter delivers efficient, reliable conversion for compact UK residential and light-commercial photovoltaic systems. With dual MPPT tracking, a wide 140–1000V MPPT window and up to 98.6% peak efficiency, it maximises yield across typical British conditions — from mixed orientations to overcast days.

A robust IP65 enclosure and fan-free thermal design enable quiet, low-maintenance operation indoors or outdoors. Safety features include residual-current and insulation monitoring, anti-islanding and surge protection to support G99 grid compliance, while certification to EN62109 underpins electrical safety. Built-in data logging with FoxCloud (Wi-Fi/LAN, optional 4G) provides clear visibility for homeowners and installers, and the T6-G3 integrates naturally with the wider Fox ecosystem when you plan future storage.

Pair with quality solar panels and proven solar mounting. If you need more headroom, consider the T8-G3 or step up to the T10-G3.

Contact Evergy for product guidance or system compatibility support.

SKU: T6-G3

Qty:

Free and easy returns | Easy to Install | Professional Installers Available

The Fox ESS T6-G3 6kW three-phase string inverter offers a perfect balance of power, efficiency, and reliability for small to mid-sized residential and light-commercial PV systems in the UK. Designed with dual MPPT tracking and a wide 140–1000V operating range, it delivers steady, high-performance energy conversion even during Britain’s variable weather conditions.

High-Efficiency Performance for British PV Systems

With two independent MPPT inputs and up to 98.6% peak efficiency, the T6-G3 optimises solar harvest across complex or shaded roof layouts. Its low 140V start-up voltage ensures early morning generation, while a 1100V maximum DC input supports flexible array configuration. Designed to perform consistently under low irradiance, this model provides robust output where many smaller inverters fall short — ideal for the UK’s changing light levels.

Built for Reliability & Protection

Built to last, the IP65-rated T6-G3 can be mounted indoors or outdoors, offering full protection against rain, dust, and corrosion. A fan-free, naturally cooled design reduces maintenance and operates quietly at around 30dB. Safety and compliance are at the core: residual-current and insulation monitoring, anti-islanding logic, and Type II surge protection are all built in. The unit meets EN62109 and G99 standards, ensuring it’s ready for UK grid integration from day one.

Key Features

Dual MPPT inputs with wide 140–1000V voltage range and 99.8% tracking accuracy
Peak efficiency 98.6% / Euro efficiency 97.8% for reliable real-world output
Compact, fan-free design with low 30dB noise level for quiet operation
IP65 aluminium housing — durable for outdoor use in UK conditions
Comprehensive protection suite: RCM, insulation, surge and anti-islanding
Built-in FoxCloud monitoring (Wi-Fi/LAN) with optional 4G upgrade

If you’re wondering how efficient the T6-G3 remains during cloudy or low-light conditions, its wide MPPT window and rapid tracking response ensure consistent energy capture — helping maintain generation even during early mornings or overcast days.

Specification data verified from Fox ESS T Series (G3) documentation (version 1.1, 2021-11-19).

Seamless Integration with Solar Panels & Battery Storage

The Fox ESS T6-G3 integrates smoothly with both solar panels and battery storage systems, making it an ideal choice for households and small businesses looking for scalable energy independence. Its high-voltage DC architecture supports efficient coupling with Fox ESS LFP batteries, ensuring low conversion loss and stable power flow. The inverter’s dual MPPT design allows flexible system layouts, supporting mixed roof orientations and multi-string installations with ease.

Smart Monitoring & Communication

Built-in FoxCloud monitoring gives homeowners and installers full transparency over solar performance, system status, and long-term yield. Standard Wi-Fi and LAN connectivity enable real-time tracking, while optional 4G ensures stable communication even in off-grid or remote properties. With additional RS485 and USB ports, the T6-G3 supports seamless integration with meters, energy management devices, and firmware updates — simplifying setup and maintenance.

Compact Design & Rugged Construction

The Fox ESS T6-G3 combines impressive power output with a small, installer-friendly form factor. Measuring approximately 370×480×183.5mm and weighing just 20kg, it can be mounted easily on most wall surfaces. Its IP65 aluminium chassis is weatherproof and corrosion resistant, ensuring durability through harsh British conditions. Natural convection cooling eliminates moving parts, keeping operation silent (~30dB) and maintenance low over the system’s lifespan.

Installer Guidance & System Notes

String design & MPPT layout

Each MPPT supports approximately 18.2A input current across a 140–1000V range. Assign separate roof orientations or string lengths to each tracker for maximum performance under varied conditions.

Battery configuration & sizing

For most UK homes, start with around 5–10kWh of Fox high-voltage LFP storage and expand as demand grows — compatible without inverter replacement.

Grid compliance & safety

Fully certified to EN62109 and compliant with G99. Integrated residual-current monitoring, insulation checks and surge protection ensure safe UK grid connection.

Why We Recommend the Fox ESS T6-G3

At Evergy, we recommend the T6-G3 for smaller three-phase systems requiring top-tier efficiency, silent operation, and durable construction. It’s a compact, intelligent choice for installers looking for easy commissioning and long-term reliability, backed by Fox ESS engineering and FoxCloud connectivity for complete control.

Evergy is the renewable division of LAMPS Electrical — a long-established independent UK wholesaler with over 15 years of experience supporting installers nationwide. We provide verified Fox ESS products, genuine UK warranty, and hands-on support from our renewables team based in Oxfordshire.

Compare in the Fox T Series (G3)

Model	Max PV (W)	Rated AC (W)	MPPTs	MPPT Window (V)	Max Eff.	Dimensions (mm)	Weight (kg)
T8-G3	12000	8000	2	140–1000	98.6%	370×480×183.5	21
T10-G3	15000	10000	2	140–1000	98.6%	370×480×183.5	21

FAQs – Fox ESS T6-G3 Three-Phase String Inverter

How does the T6-G3 differ from the T8-G3?

The T6-G3 offers a 6kW AC output and is designed for smaller three-phase systems, whereas the T8-G3 provides 8kW for higher-capacity installations.

Is it compatible with Fox ESS batteries?

Yes — it supports Fox ESS high-voltage LFP batteries, scalable from 5 to 10kWh and beyond as requirements evolve.

Can it be installed outdoors?

Yes. Its IP65 enclosure and passive cooling design make it ideal for both outdoor and indoor installation in the UK climate.

How can I monitor performance?

Through FoxCloud, accessible via app or browser — Wi-Fi and LAN are standard with 4G available for remote locations.

What are the inverter’s dimensions and weight?

The T6-G3 measures 370×480×183.5mm and weighs around 20kg.

For assistance with system specification or compatibility checks, contact Evergy — trusted UK supplier of professional solar equipment.

Attribute name	Attribute value
Dimensions	Not specified
Weight	Not specified
Warranty	10 Years
Rated Power	6,000 W
Max Efficiency	98.6%
Max Input Voltage	1,100 V
MPPT Quantity	2
DC Start-up Voltage	140 V
Protection Class	IP65 (Outdoor Use)

T6-G3

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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A rugged IP65 enclosure and fan-free thermal design support quiet, low-maintenance operation indoors or outdoors. Safety features — residual-current and insulation monitoring, anti-islanding and surge protection — help streamline G99 commissioning, while certification to EN62109 underpins electrical safety. Built-in data logging with FoxCloud (Wi-Fi/LAN, optional 4G) gives homeowners and installers clear visibility of generation and system health. The T8-G3 also provides a straightforward pathway to battery adoption within the Fox high-voltage LFP ecosystem when you’re ready.

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Contact Evergy for product guidance or system compatibility support.

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