Fox ESS H3 Pro 20kW Three-Phase Hybrid Inverter with ECS4300 29.03kWh Battery Stack
The Fox ESS H3 Pro 20kW with ECS4300 battery stack (package part number FE-H3-PRO-20.0-ECS4300) is a complete three-phase hybrid storage system comprising the Fox ESS H3 Pro 20 kW hybrid inverter (FE-H3-PRO-20.0) 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 20 kW, and full three-phase backup capability. It accepts up to 30,000 W of PV input (10,000 W per MPPT) at up to 1,000 V. 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 20 kW 3PH Hybrid Inverter (FE-H3-PRO-20.0)
- 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-20.0-E)
- Part number: FE-H3-PRO-20.0
- Inverter type: Three-phase hybrid (PV inverter and battery storage controller)
- Rated output power: 20,000 W
- EPS output power: 20,000 W
- Maximum recommended DC power: 10,000 W per MPPT (30,000 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 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
- 20 kW 3-MPPT hybrid inverter with full three-phase EPS at 20,000 W
- Dual battery inputs: a second full stack can be added for increased capacity
- 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
System Compatibility
- The H3 Pro supports dual battery stacks; a second stack can be added to the second battery input for expanded capacity
- 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)
- FE-LAN-STICK is not compatible with this range
Installation Notes
- Total package weight: 312.8 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 20 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.
Can I add a second battery stack?
Yes. The H3 Pro has dual battery inputs, so a second full battery stack can be connected to the second input for increased total storage capacity.
Does this system provide three-phase backup power?
Yes. The H3 Pro provides full three-phase EPS at 20,000 W when paired with the battery stack.
What is the total weight of this package?
The total package weight is 312.8 kg (inverter 52.5 kg, battery stack 260.3 kg). Each component requires a two-person lift.
DECO Group supplies Fox ESS H3 Pro hybrid inverter and battery packages 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 supply Fox ESS three-phase hybrid inverter and battery packages to professional installers and electrical contractors across the UK. Our pre-matched packages streamline ordering for common system configurations. Visit decogroup.co.uk for the full catalogue.
