Fox ESS 3.97kWh Lithium Iron Phosphate Battery Module 97-223-00023-00

The Fox ESS AIO EQ4000 is a high-performance modular high-voltage battery storage system designed exclusively for Fox ESS All-In-One (AIO) energy storage applications. Utilizing advanced LiFePO4 prismatic cell technology, the EQ4000 delivers exceptional safety, long cycle life, and reliable performance for residential and light commercial energy storage systems.

Its modular architecture allows the system to scale from 7.95kWh up to 19.87kWh in a single stack, with support for up to five battery modules in series and expansion up to 27.8kWh depending on system configuration. The plug-and-play design simplifies installation while reducing labor time for installers and system integrators.

Key Technology

• LiFePO4 Prismatic Cell Technology
  Provides excellent thermal stability, long cycle life, and enhanced safety performance.

• Expandable Modular Design
  Scalable energy storage architecture supports growing energy requirements over time.

• 90% Depth of Discharge
  Maximizes usable energy capacity while maintaining long-term battery health.

• High Round-Trip Efficiency
  Greater than 95% efficiency helps maximize stored energy utilization.

• CAN Communication
  Provides seamless communication with compatible Fox ESS AIO systems.

• Wide Voltage Range
  Supports operating voltages up to 459.9V for flexible high-voltage applications.

• IP65 Protection Rating
  Suitable for both indoor and outdoor installations.

• Plug-and-Play Installation
  Simplifies installation and reduces commissioning time.

Best Uses

• Residential Energy Storage Systems
  Provides backup power and energy management for homes.
• Self-Consumption Optimization
  Stores excess solar production for use during peak utility pricing periods.
• Backup Power Applications
  Supplies stored energy during utility outages and grid interruptions.
• Solar + Storage Systems
  Pairs with Fox ESS AIO inverters for integrated energy storage solutions.
• Expandable Energy Systems
  Ideal for customers expecting future energy demand growth.

Warranty

• Standard Warranty: 12.5 Years
• Battery Chemistry: LiFePO4 Prismatic Cells
• Depth of Discharge: 90%
• Round Trip Efficiency: >95%

Product Specifications

Scalable High-Voltage Energy Storage for Modern Solar Systems

The Fox ESS AIO EQ4000 combines modular scalability, LiFePO4 safety, high efficiency, and plug-and-play installation into a flexible energy storage platform designed for modern solar and backup power applications.

Why Buy From US Solar Supplier

US Solar Supplier is an American-founded company based in Kentucky dedicated to offering top-quality solar components from trusted manufacturers. We provide competitive pricing, dependable inventory, and products backed by warranties you can trust.

Our inventory is updated daily with the latest solar technologies, and our experienced team is ready to assist with product selection, system design, and installation guidance.

Need Assistance?

Have questions before you order? Call 1-800-230-7004 to speak with our knowledgeable support team. We're here to help with product details, compatibility questions, or purchasing support.