Fox ESS 12.0kW T Series 3PH Dual Tracker PV Inverter

Fox ESS T12-G3 12kW T Series Three-Phase Dual MPPT Grid-Tie PV Inverter

The Fox ESS T12-G3 (part number FE-T-12.0) is a 12.0 kW three-phase, dual-MPPT grid-tie PV inverter from the Fox ESS T Series G3 range. With a maximum efficiency of 98.6%, a Euro efficiency of 97.8%, and an MPPT tracking efficiency of 99.8%, the T12-G3 is designed for larger domestic and small-scale commercial three-phase installations. It features a start-up voltage of 140 V, an MPPT operating range of 140 V to 1,000 V, and accepts a maximum DC input of 18,000 W at up to 1,100 V across two independent MPPT trackers with 1+1 string configuration. The T12-G3 is IP65 rated for outdoor installation, weighs 20 kg, and measures 370 x 480 x 183.5 mm. A Fox WiFi data logging stick is included for monitoring via Fox Cloud. It is battery ready for future upgrade with Fox ESS storage solutions. Part of the T Series G3 range covering 3.0 kW to 25.0 kW. Available from DECO Group, a UK solar wholesaler for professional trade installers.

Key Technical Details

• Part number: FE-T-12.0
• Supplier part number: T12
• Model: T12-G3
• Inverter type: Three-phase grid-tie, transformerless
• Rated output power: 12,000 W
• Maximum output apparent power: 13,200 VA
• Rated output current: 17.4 A
• Maximum output current: 19.1 A
• Rated grid voltage: 3/N/PE, 220/380 V, 230/400 V, 240/415 V
• Rated grid frequency: 50/60 Hz
• Power factor: 1 (adjustable from 0.8 leading to 0.8 lagging)
• Total harmonic distortion (THDi): less than 3%
• Maximum PV input power: 18,000 W
• Maximum input voltage: 1,100 V
• MPPT operating voltage range: 140 V to 1,000 V
• Rated input voltage: 600 V
• DC startup voltage: 140 V
• Maximum DC input current: 14 A per MPPT
• Maximum short-circuit current: 18.2 A per MPPT
• MPPT quantity: 2
• Strings per MPPT: 1 + 1
• DC fuses: 2
• MPPT efficiency: 99.8%
• Maximum efficiency: 98.6%
• Euro efficiency: 97.8%
• Connector: MC4 (2 included)
• DC switch: Optional
• AFCI: Optional
• Surge protection: Type II (DC and AC)
• Communication: RS485, Meter, DRM, E-stop
• Monitoring module: WiFi data logging stick included; 4G optional
• Display: LCD, touch key, app, website
• Cooling: Fan
• Noise emission (typical): less than 55 dB
• Ingress protection: IP65
• Operating temperature range: -25°C to 60°C
• Humidity: 0% to 100% (no condensation)
• Maximum operating altitude: 3,000 m
• Internal consumption at night: less than 3 W
• Dimensions: 370 x 480 x 183.5 mm (W x H x D)
• Weight: 20 kg

Key Features

• Three-phase output for balanced grid connection on domestic and commercial properties
• Dual independent MPPT trackers with 1+1 string configuration for flexible roof layouts
• 98.6% maximum efficiency with 99.8% MPPT tracking efficiency
• High input voltage ceiling of 1,100 V allowing longer string lengths and reducing DC cabling
• Wide MPPT range of 140 V to 1,000 V
• Maximum 18,000 W DC input giving a 1.5:1 DC/AC ratio
• Built-in Type II surge protection on both DC and AC sides
• WiFi data logging stick included for Fox Cloud monitoring
• IP65 rated for outdoor installation
• Fan-cooled for sustained high-power operation
• Battery ready for future integration with Fox ESS storage solutions

System Compatibility

• Part of the Fox ESS T Series G3 three-phase dual-MPPT range covering 3.0 kW to 25.0 kW
• MC4 DC connectors (2 pairs included)
• Compatible with high-efficiency and bifacial solar modules
• Battery ready when paired with Fox ESS storage solutions
• Supports export limitation
• Optional DC switch and AFCI available
• WiFi included; LAN and 4G monitoring modules available as optional alternatives

Protection Features

• Insulation monitoring
• Residual current monitoring
• PV string current monitoring
• DC reverse polarity protection
• Anti-islanding protection
• AC short-circuit protection
• AC overcurrent protection
• AC overvoltage protection
• Surge protection: Type II (DC and AC)

Certifications and Compliance

• EN 62109-1/2 (Safety)
• EN 50549-1
• G99
• G100
• EMC: EN 61000-6-1/2/3/4

Warranty

• Standard warranty: 5 years
• Extended warranty: 10 years when the installation is registered with Fox ESS online

Common Questions

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DECO Group stocks the Fox ESS T Series G3 three-phase inverter range from 3.0 kW to 25.0 kW alongside Fox ESS storage systems, monitoring modules, and compatible system accessories. Browse our Fox ESS three-phase inverter catalogue for complete domestic and commercial system components.

About DECO Group

We supply Fox ESS three-phase grid-tie inverters, hybrid storage systems, and monitoring hardware to professional solar installers and electrical contractors across the UK. Our T Series G3 range covers all wattage variants from domestic three-phase through to commercial-scale applications. Visit decogroup.co.uk for the complete range.