Fox ESS H3 Pro 25kW Three-Phase Hybrid Inverter with ECS4300 29.03kWh Battery Stack
The Fox ESS H3 Pro 25kW with ECS4300 battery stack (package part number FE-H3-PRO-25.0-ECS4300) is a complete three-phase hybrid storage system comprising the Fox ESS H3 Pro 25 kW hybrid inverter (FE-H3-PRO-25.0) and a full 7-module battery stack: 1 x ECM4300 Master (FE-HV-ECM-4300) and 6 x EQS4300 Slave (FE-HV-EQS-4300), delivering 29.03 kWh of storage at 90% depth of discharge. The H3 Pro is a 3-MPPT hybrid inverter and battery storage controller with dual battery inputs, built-in EPS at 25 kW, and full three-phase backup capability. It accepts up to 37,500 W of PV input (12,500 W per MPPT) at up to 1,000 V with a maximum charge rate of 30 kW. WiFi dongle and three-phase meter included. Available from DECO Group, a UK-based solar trade wholesaler.
Package Contents
- 1 x Fox ESS H3 Pro 25 kW 3PH Hybrid Inverter (FE-H3-PRO-25.0)
- 1 x Fox ESS ECM4300 4.14 kWh HV Battery Master (FE-HV-ECM-4300)
- 6 x Fox ESS EQS4300 HV Battery Slave (FE-HV-EQS-4300)
Inverter Specifications (H3-PRO-25.0-E)
- Part number: FE-H3-PRO-25.0
- Inverter type: Three-phase hybrid (PV inverter and battery storage controller)
- Rated output power: 25,000 W
- EPS output power: 25,000 W
- Maximum recommended DC power: 12,500 W per MPPT (37,500 W total)
- Maximum input voltage: 1,000 V
- MPPT operating voltage range: 150 V to 850 V
- DC startup voltage: 160 V
- Maximum DC input current: 32 A per MPPT (96 A total)
- MPPT quantity: 3 (strings per MPPT: 2/2/2)
- Maximum DC inputs: 6
- Connector: MC4 (12 included)
- Battery voltage range: 150 V to 800 V
- Battery inputs: 2 (supports dual battery stacks)
- Maximum charge rate: 30 kW
- Maximum efficiency: 97.80%
- Euro efficiency: 97.4%
- Ingress protection: IP65
- Dimensions: 600 x 560 x 225 mm (W x H x D)
- Weight: 52.5 kg
Battery Stack Specifications (7-Module: 1 x Master + 6 x Slave)
- Battery chemistry: LiFePO₄
- Total nominal capacity: 29,030 Wh (29.03 kWh)
- Depth of discharge: 90%
- Communication: CAN / RS485
- Master weight: 38.3 kg
- Slave weight: 37 kg each
- Total battery weight: 260.3 kg
Key Features
- Complete three-phase hybrid storage system with 29.03 kWh battery capacity
- 25 kW 3-MPPT hybrid inverter with full three-phase EPS at 25,000 W
- Dual battery inputs: a second full stack can be added for increased capacity
- 30 kW maximum charge rate
- 97.80% maximum efficiency
- Up to 10 inverters in parallel (Fox H3 Pro EMS required)
- WiFi dongle and three-phase meter included
- IP65 rated inverter for indoor or outdoor installation
- FE-LAN-STICK is not compatible with this range
System Compatibility
- The H3 Pro supports dual battery stacks; a second stack can be added to the second battery input
- Maximum 2 stacks with 7 modules per stack (1 x Master + 6 x Slaves), for a total of 2 x Master + 12 x Slaves
- Compatible with all Fox ESS high-voltage batteries: ECS, EQ, HV2600, and MIRA HV25
- Up to 10 H3 Pro inverters in parallel (Fox H3 Pro EMS required)
Installation Notes
- Total package weight: 317.8 kg. Two-person lift required for each component
- Must be installed by a qualified electrician or technician in compliance with local wiring regulations
Warranty
- Inverter: 5 years standard; 10 years when registered with Fox ESS online
- Batteries: 5 years standard; 12 years when registered with Fox ESS online
Common Questions
Click a question below to reveal the answer.
What is included in this package?
The package includes a Fox ESS H3 Pro 25 kW hybrid inverter (with WiFi dongle and three-phase meter), plus a 7-module battery stack (1 x ECM4300 Master + 6 x EQS4300 Slave) providing 29.03 kWh of storage.
What is the difference between the 20kW, 25kW, and 30kW H3 Pro packages?
All three packages include the same 29.03 kWh battery stack. The inverters differ in rated output: 20 kW, 25 kW, or 30 kW, with corresponding PV input capacity of 30 kW, 37.5 kW, or 45 kW respectively. EPS backup matches the inverter rating.
Can I add a second battery stack?
Yes. The H3 Pro has dual battery inputs, supporting a maximum of 2 stacks with 7 modules each (2 x Master + 12 x Slaves total).
Does this system provide three-phase backup power?
Yes. The H3 Pro provides full three-phase EPS at 25,000 W when paired with the battery stack.
DECO Group supplies Fox ESS H3 Pro hybrid inverter and battery packages at 20 kW, 25 kW, and 30 kW alongside individual inverters, battery stacks, and system accessories. Browse our Fox ESS catalogue for complete three-phase hybrid storage system configurations.
About DECO Group
We are a UK-based solar and energy storage wholesaler supplying three-phase hybrid inverter and battery packages to professional installers and electrical contractors. Our Fox ESS H3 Pro packages combine inverters with pre-matched battery stacks for streamlined project ordering. Visit decogroup.co.uk for the full catalogue.
