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Portable Fox Ess Ecs4000 Battery Cm4000 | Master Lfp Stackable Batteries With Full Capacity 3.975kwh Set [yoU17SHZ]

$66.99 $214.99 -69%

The CM4000 is the controller module in the modular ECS4000 battery system. It comes paired with CS4000 slave modules to form high-voltage battery stacks.FeaturesThe FOX ECS CM4000, as part of the scalable ECS4000 lineup, offers:Modular scalability: B

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The CM4000 is the controller module in the modular ECS4000 battery system. It comes paired with CS4000 slave modules to form high-voltage battery stacks.

Features

The FOX ECS CM4000, as part of the scalable ECS4000 lineup, offers:

  • Modular scalability: Build systems from ~4 kWh up to ~28 kWh
  • High-performance LiFePO₄ chemistry: Long life, safe, stable
  • Efficient & certified: >95% round-trip efficiency, UL/IP65 rated
  • Plug-and-play: Easy installation with CAN communication and LED indicators
  • Durability: Outdoor-rated, 6000+ cycles, 12.5-year warranty

 

System Configurations (ECS4000 Series)

Modules (1 CM + N CS) Capacity (kWh) Nominal Voltage (V) Voltage Range (V)
H2 (1 + 1) 7.95 115.2 97.2–131.4
H3 (1 + 2) 11.9 172.8 145.8–197.1
H4 (1 + 3) 15.9 230.4 194.4–262.8
H5 (1 + 4) 19.9 288 243–328.5
H6 (1 + 5) 23.8 345.6 291.6–394.2
H7 (1 + 6) 27.8 403.2 340.2–459.9

 

Use Cases

  • Residential backup and time-of-use load shifting
  • Off-grid or grid-connected systems with Fox ESS H1 inverters
  • Scalable energy storage: Start small and expand up to ~27.8 kWh
  • Outdoor or indoor installations for homes and small businesses

 

Shipping and Packaging

  • The battery can only ship via freight truck

 

Download

Datasheet
FoxESS ECS4000 Datasheet


User Manual & Installation Guide
FoxESS ECS4000 User Manual

FoxESS ECS4000 Installation Quick Guide

Certification
Fox ECS4000-UL-9540A

HUB &WiFi
Fox Hub-G2 Datasheet
Fox Smart WiFi Datasheet
FoxESS Cloud User Manual


About FOX ESS

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. 

What Our Customers Say

December 30, 2025

Absolutely no complaints!

This is a very well-conceived piece of gear.

- Giles L..

December 30, 2025

Absolutely no complaints!

Really, really, really, really pleased with this purchase.

- Bledri D..

December 30, 2025

Absolutely no complaints!

The attention to detail is remarkable.

- Xavier D..

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