Fox ESS Battery Storage System Kit | H1-11.4-US 11.4kW Split-Phase Hybrid Inverter + ECS4000-H5 19.87kWh High Voltage Battery + Smart Hub G2 | Certificated UL9540

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Simplified Installation
-Plug and play setup

Higher Backup Capacity
-Support more appliances with
parallel connection
-Tolerates higher power surges for
long time
- Compatible with Generac

Smart Load Control
-Automatic load consumption management
-Power distribution optimization during blackout

12.5 Years Warranty
IP65 suitable for outdoor

See H1-11.4-US specs >
See battery specs >
See hub specs >

$9,550.00$12,850.00 Save $3,300.00
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The FoxESS Hybrid Off-Grid/Grid-Tie Home Energy Storage System Kit is a turnkey solution for home energy, with an 11.4kW output hybrid inverter, 19.87kWh FoxESS stackable high voltage storage with 5 battery modules, and a FoxESS Smart Hub for easy monitoring and having an ability to seamlessly switch to backup power when power outages

This energy storage system is designed for households that have newly installed solar systems, aiming to achieve self-consumption of home electricity, lower electricity bills, and improve the return on investment efficiency of the solar system. It also enhances the stability of your home power supply.

System Notable Features:

  • It greatly reduces the reliance on grid energy for household electricity by generating your renewable energy, allowing for self-consumption, and ensuring a stable energy supply for your home.

  •  Self-consumption means that the storage system can store the excess electricity generated by the rooftop solar panels during the day that cannot be immediately consumed, in the energy storage system. This stored energy can then be utilized during the evening when electricity demand and prices are both at peak rates. This home energy battery storage system maximizes the reduction, and even elimination, of your electricity bills, achieving self-consumption. It significantly enhances the utilization efficiency and returns on investment of the solar power system, especially in areas implementing Time of Use(TOU) electricity pricing policies. For example, in California's new solar energy policy NEM3.0, if there is no energy storage system, selling excess solar electricity to the grid during the day would not exceed 8 cents per kilowatt-hour, but when the solar power system does not generate electricity at night and electricity needs to be drawn from the grid, the price of electricity would not be lower than 30 cents per kilowatt-hour.

  • In situations of unstable grid power or power outages, the system can intelligently switch to Off-grid mode, supplying power to your household appliances and loads through the energy storage system, enabling your home to have an independent energy supply.

What included in this bundle

1 *  FoxESS H1-11.4-US 11.4kW Split-phase hybrid inverter with Tigo/WiFi Transmitter,  energy meter
1 *  FoxESS CM4000 high voltage battery with BMS
4 * FoxESS CS4000 high-voltage battery modules
1 * Fox Hub G2 smart energy management system

FoxESS H1-11.4-US 11.4kW Split-Phase Hybrid Inverter
The H1-11.4-US is a split-phase hybrid inverter that works with a rechargeable high-voltage energy battery and powers your home load. Its Innovation, quality, and high performance make it extremely suitable for residential energy storage systems. 

The FoxESS H1-11.4-US inverter has 3 MPP trackers with 4 strings (2 strings for one tracker, and 1 string for other trackers)that can be connected, making it transformerless and particularly efficient. The CEC efficiency is 97.0% and the max efficiency is up to 97.6%. This is important when the PV system consists of areas with different strengths, such as an east-west orientation.

In the event of a power outage, this hybrid inverter with built-in emergency power capability continues to supply one phase with a switch-over time of 20ms and a power output of 11400W. 
Key Features

  • Easy installation, flexible configuration, plug-and-play set-up
  • Work with high-voltage batteries for maximum round-trip efficiency
  • IP65-rated, suitable for outdoor installation
  • Remote monitoring. Via smartphone app or web portal
  • Easily expands, and can be connected in parallel when the battery added


Max. PV Input Power 22800W
Max. Input Voltage 600V
Rated Input Voltage 380W
Max. Output Power 11400W
CEC efficiency 97.5%
Max efficiency 98.0%
Max.Battery Discharge Efficiency 97.4%
Rated output current( per phase ) 47.5A
Max. output current( per phase ) 47.5A
Dimensions(W / H / D) 25.2*17.7*9.6inch(640 / 450 / 244mm)
Weight 83.3lbs(38kg)
Warranty 12.5 Years

Standard Compliance

Safety UL1741, UL1741 SA, UL1699B, CSA C22.2, UL62109-1, UL1998
EMC FCC Part 15 Class B
Grid Regulation IEEE1547, IEEE1547.1, Rule 21

——>Download: Datasheet

FoxESS ECS4000-H4 19.87kWh High Voltage Battery Storage System

The ECS4000-H4 with a capacity of 19.87kWh, is a high-performance, stackable battery storage system. The modular design allows for maximum flexibility, making it suitable for a broad range of storage applications.

Additional batteries can be installed in series, allowing for a maximum storage capacity of 19.87kWh. Installation is easy, with a plug-and-play solution that can save valuable time for you.

Key Features

  • Easy installation with a modular and stacked design
  • Flexible capacity option, easily scalable for whole-home backup by parallel connection
  • Excellent safety 
  • High efficiency, 90% DoD
  • Wide temperature tolerance
  • 12.5 years warranty


Number of Modules 5: 1*CM4000(with BMS), 4*CS4000
Nominal Capacity 19.87kWh
Nominal Voltage 288V
Operating Voltage 194.4~262.8V
Cycle Life >= 6000
Dimension(W/H/D) 22.4 / 28.0 / 15.0inch(570*710*380mm)
Weight 392lbs(178.2kg)
IP Protection IP65
Installation Outdoor / Indoor( Stand )
Operation Temperature[C/F]   

-20~55°C* 3/ 14~131

Warranty 12.5 Years


Safety UL1973, UL9540, UL9540A
Ingress Protection IP65
Transportation UN38.3

——>Download: Datasheet

FOX HUB G2 Smart Energy Management System
As a smart energy management system, Fox Hub completes the most critical piece of the puzzle in Fox ESS residential energy storage system. By integrating multiple intelligent features, Fox Hub centralizes power from multiple sources and performs energy redistribution via FoxClound US App to provide a more comprehensive power solution. It reassures energy flow safety under different circumstances, and relieves homeowners from power loss concerns.

  • Automatic Off-Grid Protection
  • Seamless On/Off Grid Transition
  • Smart Load Shedding Circuit
  • Inverter Scalability
  • Generator Compatibility


User Manual & Quick Guide



FOX ESS is a leading provider of advanced energy storage solutions that empower customers to optimize their energy usage, reduce their carbon footprint, and enhance their energy independence. Founded in 2016, 15% of FOX ESS staff are engineers with a core R&D center base in Shang Hai. FOX ESS has developed a wide range of energy storage products and services that cater to the needs of various industries, including residential-use, utilities, commercial and industrial customers. FOX ESS is committed to delivering innovative, reliable, and cost-effective energy storage solutions that meet the evolving needs of the energy market. With a global team of experienced engineers and energy experts, the primary markets of  FOX ESS include Germany, Italy, the UK, Brazil, Poland, and the US.


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