Fox ESS Energy Cube ECM2900 Master: The Smart Core for Your 2.88kWh+ HV Battery System

Begin your journey to energy independence with the Fox ESS Energy Cube ECM2900 Master Battery. This high-voltage (HV) unit forms the intelligent heart of the modular Fox ECS battery energy storage system. With an initial capacity of 2.88kWh, it allows you to store surplus energy generated by your solar panels, ready for use when the sun isn't shining or when grid electricity prices (energy tariffs) are high. Partnered with a compatible Fox ESS hybrid or AC-coupled inverter, it's a key component in reducing your bills and environmental impact.

High-Voltage Efficiency with LiFePO4 Safety

The ECM2900 Master unit utilises reliable and safe Lithium Iron Phosphate (LiFePO4) prismatic cells, providing 2.88kWh of nominal capacity. The technical specifications indicate a high round-trip efficiency of over 95% and a deep 90% depth of discharge, ensuring you maximise the usable energy stored. High voltage systems like this often offer efficiency benefits when paired with compatible solar inverters.

Scalable Storage Tailored to Your Needs

The beauty of the Fox Energy Cube system lies in its scalability. This ECM2900 Master unit manages the entire stack and can be paired with up to six ECS2900 Slave modules. As detailed in the datasheet, this allows you to expand your total system capacity from the initial 2.88kWh (Master only - requires at least one slave for operation in most systems) up to 20.16kWh (1 Master + 6 Slaves). This flexibility ensures the system can grow alongside your energy requirements.

Designed for Simple Installation and Reliability

Fox ESS emphasises ease of installation with a 'plug and play' approach for the ECS series, which can save installers significant time. The modular design means units are simply stacked on top of each other. The system boasts an IP65 rating, making it suitable for installation either indoors or outdoors (floor standing), protected against dust and water ingress. A long cycle life of ≥6000 cycles, referenced in the technical data, ensures years of dependable service, backed by the manufacturer's warranty (refer to warranty documentation for specifics).

Why Evergy Recommend This Product

The Fox ESS ECM2900 Master battery is an excellent starting point for HV storage:

• Provides the essential control and initial 2.88kWh capacity for the ECS2900 system.
• Uses safe, long-lasting LiFePO4 cell technology with high efficiency.
• Enables extensive scalability (up to 20.16kWh total) by adding slave units.
• Features a user-friendly, plug-and-play, stackable installation design.

Technical Highlights

Based on the ECS2900 series datasheet:

• Module Type: Master Control Module (CM2900 within the stack)
• Nominal Capacity (Module): 2.88 kWh
• Cell Technology: LiFePO4
• Depth of Discharge: 90%
• Communication: CAN/RS485

Note: This Master unit must be combined with at least one ECS2900 Slave module for system operation. Refer to the full datasheet and compatibility information for system voltage and current specifications based on the number of modules.

Start Building Your Fox ESS System

Take the first step towards optimised energy storage with the Fox ESS ECM2900 Master. Combine it with ECS2900 Slave modules, a compatible Fox ESS inverter, and efficient solar panels. Ensure you have the right solar cabling and floor mounting for a seamless installation.