FOX ESS Battery Storage System

Fox ESS is an leading home energy storage system manufacturer and ranks top1 residential battery storage in Germany and Australia. They deliver industry-leading residential energy storage solutions for homeowners across the United States, including FOX ESS H1 9.6kW / 11.4kW split-phase hybrid inverter, ECS 4000 high-voltage battery storage system, PowerQ AIO battery storage system and Smart hub G2.
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Fox ESS ECS4000-H5 19.87kWh High Voltage Battery Storage System | Compatible with Fox ESS H1 Series Hybrid inverter | Certificated UL9540

Fox ESS ECS4000-H5 19.87kWh High Voltage Battery Storage System | Compatible with Fox ESS H1 Series Hybrid inverter | Certificated UL9540

$7,850.00
$8,150.00
Save $300.00
The Energy Cube is a high-performance, scalable battery storage system. The modular design allows for maximum flexibility, making it suitable for a broad range of storage applications. Additional batteries can...
Fox ESS ECS4000-H4 15.88kWh High Voltage Battery Storage System | Compatible with Fox ESS H1 Series Hybrid inverter | Certificated UL9540

Fox ESS ECS4000-H4 15.88kWh High Voltage Battery Storage System | Compatible with Fox ESS H1 Series Hybrid inverter | Certificated UL9540

$6,350.00
$7,750.00
Save $1,400.00
  The Energy Cube is a high-performance, scalable battery storage system. The modular design allows for maximum flexibility, making it suitable for a broad range of storage applications. Additional batteries...
FOX ESS H1-7.6-US 7.6kW Split-Phase Hybrid Inverter | 15.2kW PV Input | Compatible with FOX ESS ECS HV Battery | Certificated UL9540

FOX ESS H1-7.6-US 7.6kW Split-Phase Hybrid Inverter | 15.2kW PV Input | Compatible with FOX ESS ECS HV Battery | Certificated UL9540

$1,650.00
$2,050.00
Save $400.00
THE FOX H1-7.6-US 7.6kW Split-Phase Pre-Wired Hybrid Inverter is an all-in-one system with 2 MPPT, WiFi included, a display with remote monitoring, and APS/Tigo transmitter integrated, that is simple to install...

About FOX ESS home energy storage system

Fox ESS is one of the world's leading residential energy storage companies. Its solutions have been deployed in more than 150 countries worldwide, and the company has consistently ranked among the top residential energy storage brands in key markets such as Germany and Australia.

For the North American market, Fox ESS offers two advanced energy storage solutions designed specifically for residential applications:

PowerQ All-in-One (AIO) Solution

The PowerQ All-in-One (AIO) solution is a highly integrated and easy-to-install energy storage system that includes:

  • An 11.4 kW split-phase (120/240V) hybrid inverter
  • 4kWh stackable battery module, 5 units for a battery stack.
  • Smart Hub G2 intelligent gateway

The inverter and battery modules utilize a wire-free stacking design, eliminating the need for complex battery cabling and significantly simplifying installation. The modular architecture provides excellent flexibility for future expansion.

The system can be flexible to config from 8 kWh to 20 kWh,

ECS4000 Split-System Solution

The ECS4000 solution includes:

  • Fox ESS H1 9.6 kW or 11.4 kW Slipt-phase hybrid inverter
  • Stackable ECS battery system
  • Smart Hub G2 intelligent gateway

The ECS battery system is composed of:

  • CM4000 Master Battery Module – with built-in Battery Management System (BMS)
  • CS4000 Slave Battery Modules

Each ECS battery system includes one CM4000 master battery module one or more CS4000 slave modules.

The ECS4000 system can be flexibly configured from 8 kWh to 20 kWh per battery stack, depending on the homeowner's energy requirements. Multiple battery stacks can also be parallel to provide big storage capacity.

The Smart Hub G2 intelligent gateway offers advanced energy management capabilities, including smart load control and an integrated diesel generator port, enabling seamless backup power operation and enhanced energy independence.

Fox ESS PowerQ All-in-One Home Energy Storage Systems

11.4kW
AC output
8-20kWh
Storage capacity range up to 80kWh by 4 units parallel
22.8kW
Maximum PV input
Fox ESS PowerQ is the latest generation of an all-in-one integrated residential energy storage system. With 11.4kW AC output and support maximum 22.8kW PV input, up to 80kWh total backup capacity, support generator integrated. PowerQ's flexibility designed to meet various backup scenarios via modular system design and scalability. Plug-and-play set-up makes it is easy for installation. Type 4x design is suitable for outdoor installation.
Grid-tied Off-grid Whole-home backup Partial-home backup DC-coupled AC-coupled retrofit

Fox ESS H1 11.4kW 120/240V Split-phase hybrid inverter

The FOX H1 11.4KW hybrid inverter is battery ready and can work with Fox ESS ECS 4000 battery storage system, with 3 MPPTs and support maximum 22.8kW PV input. Full certified UL1971 and UL9540 with FOX ESS ECS 4000 battery system. The FOX ESS H1 series hybrid inverter available at Self2Solar.

Fox ESS ECS 4000 battery

The FOX ESS ECS 4000 battery system has two battery modules, ECS CM4000 is the master battery module with built-in BMS. The ECS CS4000 is the slave battery module. Each ECS 4000 battery system consist of 1 CM4000 module and several CS4000 battery modules.
Both of two modules have two versions: regular version and self-heating built-in version. Self2Solar stocks both of them.

Master battery module
ECS CM4000
3.97KWH capacity with built-in BMS . Regular version and Self-heating version available.
Slave battery module
ECS CS4000
3.97KWH capacity and can expand to 6 units in a stack.

FOX ESS Smart Hub G2

The FOX ESS Smart hub G2 is a smart energy management system that works with FOX ESS PowerQ AIO and ECS 4000 battery storage system. several intelligent features is integrated, includes automatic transfer switch, smart loading and generator compatibility.

FREQUENTLY ASKED QUESTIONS

What does a FOX ESS PoweQ all-in-one system include?

A FOX ESS PowerQ AIO system includes the Fox ESS PowerQ 11.4kW Hybrid Inverter , Fox ESS AIO 3.97kWh Lithium Iron phosphate battery modules, the system will consist of 2 up to 7 units in one battery stack. FOX ESS Smart HUB G2 for a energy management gateway.

Can I expand my FOX ESS PowerQ AIO system battery capacity later?

Yes — PowerQ is designed to meet various backup scenarios via modular system design and scalability. You can expand your system up to 80kWh backup capacity.

What's the difference of FOX ESS ECS CM4000 battery module and ECS CS4000 battery module?

The ECS CM4000 is a master battery module with built-in BMS, the ECS CS4000 is a slave battery module to expand the battery system. They consist of the Fox ESS ECS 4000 battery storage system.

Do the PowerQ 4KWH LFP battery module and ECS 4000 4KWH LFP battery module can be mixed in the same system?

No, the PowerQ battery module and ECS 4000 battery module can't be mixed use. They are different battery module. Please contact us if you can't confirm which battery modules your system need.

What are the differences between Fox ESS PowerQ AIO system and FOX ESS ECS4000 battery storage system?

There are several difference between PowerQ AIO system and ECS4000 system:
- The PowerQ AIO system's inverter is modular design and stack with the PowerQ battery module, and plug-and-play for installation, no cable wiring. The ECS4000 battery system need to work with FOX ESS H1 series hybrid inverter, this inverter need to hook to the wall and connect to ECS 4000 battery with cable.

- They use different battery modules.
The PowerQ AIO system use EQ4000 4kWh battery module. The ECS4000 system use CM4000 ( with built-in BMS ) and CS4000 4kWh battery modules.

Which battery can be compatible with FOX ESS H1 series ( 7.6kW / 9.6kW / 11.4kW ) hybrid inverter?

The Fox ESS H1 series hybrid inverter is compatible with FOX ESS ECS 4000 battery storage system and certified UL9540.

My solar system is a grid-tie system with FOX ESS H1 series hybrid inverter, can i hook battery to have backup?

Yes, you can hook FOX ESS ECS 4000 battery storage system and smart hub G2 to backup your home during power outage.

What UL certifications do PowerQ AIO and ECS 4000 systems carry?

The FOX ESS PowerQ AIO system and ECS 4000 system are full certified , including UL9540 for system, UL1971 for certification and CEC Listed status as certified by the manufacturer. Battery modules carry UL9540 and UL9540A for battery module, UL1971 for hybrid inverter. It is also CEC listed and qualified SGIP program.

What's the function for FOX ESS Smart hub G2? Is it necessary for the Fox ESS battery backup system?

The FOX ESS Smart hub G2 is a smart energy management gateway, have automatic transfer switch ( ATS ) Integrated for the system on/off grid transition. It also has smart load circuit and generator compatibility. So it is necessary for your system if you want to have your system keeping running during power outage. However, you don't need to install it if your solar system is only a grid-tie system without battery backup.

What warranty do FOX ESS PowerQ and ECS 4000 come with?

All the FOX ESS battery, inverter and smart hub G2 are 12.5 years warranty. Contact Self2Solar for full warranty documentation and details.

Why buy FOX ESS products from Self2Solar?

Self2Solar is FOX ESS's authorized distributor and stocking a wide range of FOX ESS PowerQ system, ECS 4000, Fox ESS H1 hybrid inverter and other components. Our US-based solar advisors are available for pre-sale system sizing and system commissioning support. Contact us through the Self2Solar website and email. Free shipping on all system bundles, fulfilled within 2–3 business days.