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FoxESS PowerQ LiFePO4 Battery Module 3.97kWh – Stackable
FoxESS PowerQ LiFePO4 Battery Module 3.97kWh – Stackable
Description

FOXESS PowerQ 3.97kWh LiFePO4 BATTERY MODULE

Modular, Scalable, and High-Performance LFP Energy Storage

Overview

The FoxESS PowerQ EQ4000 is a high-performance, modular lithium iron phosphate (LiFePO4) battery module specifically designed for the PowerQ All-In-One (AIO) residential energy storage system. This module offers the ultimate in flexibility, allowing homeowners to start with a single module and scale as their energy needs grow.

With its high-voltage stackable design, the PowerQ system supports 2 to 5 modules per stack, providing up to 19.85kWh of storage capacity. For even larger requirements, multiple stacks can be combined to reach a massive 79.4kWh of total system storage.

Engineered for long-term reliability and safety, the EQ4000 utilizes LFP prismatic cells known for their thermal stability and long cycle life. Its plug-and-play configuration ensures a clean, fast installation, while its IP65 rating makes it suitable for both indoor and outdoor floor-mount setups.

Key Features
Scalable LFP battery module offering high round-trip efficiency and flexible stacking for whole-home backup.
  • • 3.97kWh Capacity – Compact but powerful storage per module
  • • Scalable Design – Stack 2-5 modules per unit for up to 19.85kWh
  • • High Efficiency – Superior >95% round-trip efficiency for minimal energy loss
  • • 90% Depth of Discharge – Maximizes usable energy compared to standard batteries
  • • Plug-and-Play Setup – Zero-tool wiring and integrated configuration for fast commissioning
  • • IP65 Weatherproof – Rugged enclosure suitable for indoor and outdoor installations
Specifications
  • Nominal Energy 3.97 kWh
  • Cell Type LiFePO4 Prismatic (LFP)
  • Max Continuous Current 50 A
  • Peak Discharge Current 65 A (60 seconds)
  • Round-Trip Efficiency >95%
  • Dimensions (Per Module) 22.4 x 15.0 x 5.4 in
  • Weight 81.35 lbs
  • Warranty 12.5 Years

FoxESS PowerQ | 3.97kWh LFP Module | Stackable Battery | 90% DoD | IP65 Outdoor Rated | 12.5-Year Warranty | UL 9540 Certified

FAQs

Frequently Asked Questions

1. What is the FoxESS PowerQ 3.97kWh battery module?
It is a modular LiFePO4 (LFP) battery unit designed to stack within the PowerQ system, allowing you to build a custom-sized home energy storage setup.
2. How much energy does one module provide?
Each module provides 3.97 kWh of usable energy, making it easy to scale your system in small increments.
3. How large can the system get?
A single stack supports 2 to 5 modules (7.94 kWh to 19.85 kWh). Multiple stacks can be combined for total system capacity of up to approximately 79 kWh.
4. What size configurations are available?
• 3.97 kWh (1 module)
• 7.94 kWh (2 modules)
• 11.91 kWh (3 modules)
• 15.88 kWh (4 modules)
• 19.85 kWh (5 modules – max per stack)
5. What battery chemistry does it use?
It uses LiFePO4 (LFP) chemistry, known for improved safety, longer lifespan, and better thermal stability compared to standard lithium-ion batteries.
6. How efficient is the system?
The system delivers over 95% round-trip efficiency, minimizing energy loss during charging and discharging.
7. How much of the battery capacity is usable?
Up to 90% depth of discharge (DoD), allowing you to utilize most of the stored energy.
8. Can the system be expanded after installation?
Yes. Additional modules can be added over time, allowing you to scale the system without replacing existing components.
9. Is installation plug-and-play?
Yes. The system is designed with tool-free, plug-and-play connections for faster and simpler installation.
10. Is it suitable for indoor or outdoor installation?
Yes. It is rated IP65, making it suitable for both indoor and outdoor environments when properly installed.
11. Does it include an inverter?
No. This is a battery module only and is designed to work with the FoxESS PowerQ All-in-One system, which includes the inverter.
12. Who is this system best for?
• Homeowners needing scalable energy storage
• Installers building modular battery systems
• Projects requiring flexible, expandable capacity

Your payment details are safe and secure. We accept the following:

American Express
Diners Club
Discover
Google Pay
JCB
Mastercard
Visa

FoxESS PowerQ LiFePO4 Battery Module 3.97kWh – Stackable

by RC City
SKU: 74958256866221
$1,599.00
Delivery 2- 5 Days
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Description

FOXESS PowerQ 3.97kWh LiFePO4 BATTERY MODULE

Modular, Scalable, and High-Performance LFP Energy Storage

Overview

The FoxESS PowerQ EQ4000 is a high-performance, modular lithium iron phosphate (LiFePO4) battery module specifically designed for the PowerQ All-In-One (AIO) residential energy storage system. This module offers the ultimate in flexibility, allowing homeowners to start with a single module and scale as their energy needs grow.

With its high-voltage stackable design, the PowerQ system supports 2 to 5 modules per stack, providing up to 19.85kWh of storage capacity. For even larger requirements, multiple stacks can be combined to reach a massive 79.4kWh of total system storage.

Engineered for long-term reliability and safety, the EQ4000 utilizes LFP prismatic cells known for their thermal stability and long cycle life. Its plug-and-play configuration ensures a clean, fast installation, while its IP65 rating makes it suitable for both indoor and outdoor floor-mount setups.

Key Features
Scalable LFP battery module offering high round-trip efficiency and flexible stacking for whole-home backup.
  • • 3.97kWh Capacity – Compact but powerful storage per module
  • • Scalable Design – Stack 2-5 modules per unit for up to 19.85kWh
  • • High Efficiency – Superior >95% round-trip efficiency for minimal energy loss
  • • 90% Depth of Discharge – Maximizes usable energy compared to standard batteries
  • • Plug-and-Play Setup – Zero-tool wiring and integrated configuration for fast commissioning
  • • IP65 Weatherproof – Rugged enclosure suitable for indoor and outdoor installations
Specifications
  • Nominal Energy 3.97 kWh
  • Cell Type LiFePO4 Prismatic (LFP)
  • Max Continuous Current 50 A
  • Peak Discharge Current 65 A (60 seconds)
  • Round-Trip Efficiency >95%
  • Dimensions (Per Module) 22.4 x 15.0 x 5.4 in
  • Weight 81.35 lbs
  • Warranty 12.5 Years

FoxESS PowerQ | 3.97kWh LFP Module | Stackable Battery | 90% DoD | IP65 Outdoor Rated | 12.5-Year Warranty | UL 9540 Certified

FAQs

Frequently Asked Questions

1. What is the FoxESS PowerQ 3.97kWh battery module?
It is a modular LiFePO4 (LFP) battery unit designed to stack within the PowerQ system, allowing you to build a custom-sized home energy storage setup.
2. How much energy does one module provide?
Each module provides 3.97 kWh of usable energy, making it easy to scale your system in small increments.
3. How large can the system get?
A single stack supports 2 to 5 modules (7.94 kWh to 19.85 kWh). Multiple stacks can be combined for total system capacity of up to approximately 79 kWh.
4. What size configurations are available?
• 3.97 kWh (1 module)
• 7.94 kWh (2 modules)
• 11.91 kWh (3 modules)
• 15.88 kWh (4 modules)
• 19.85 kWh (5 modules – max per stack)
5. What battery chemistry does it use?
It uses LiFePO4 (LFP) chemistry, known for improved safety, longer lifespan, and better thermal stability compared to standard lithium-ion batteries.
6. How efficient is the system?
The system delivers over 95% round-trip efficiency, minimizing energy loss during charging and discharging.
7. How much of the battery capacity is usable?
Up to 90% depth of discharge (DoD), allowing you to utilize most of the stored energy.
8. Can the system be expanded after installation?
Yes. Additional modules can be added over time, allowing you to scale the system without replacing existing components.
9. Is installation plug-and-play?
Yes. The system is designed with tool-free, plug-and-play connections for faster and simpler installation.
10. Is it suitable for indoor or outdoor installation?
Yes. It is rated IP65, making it suitable for both indoor and outdoor environments when properly installed.
11. Does it include an inverter?
No. This is a battery module only and is designed to work with the FoxESS PowerQ All-in-One system, which includes the inverter.
12. Who is this system best for?
• Homeowners needing scalable energy storage
• Installers building modular battery systems
• Projects requiring flexible, expandable capacity

Your payment details are safe and secure. We accept the following:

American Express
Diners Club
Discover
Google Pay
JCB
Mastercard
Visa

Frequently asked questions

Find answers to common questions about our products and services

Small orders ship via UPS or USPS (2-3 business days). Panels, batteries, and large items ship via LTL freight (3-5 business days)

We accept returns in accordance with our Return & Refund Policy. Please review the full details here:

Return & Refund Policy
Cancellation Policy

Yes, we ship to most countries worldwide. International shipping times vary by destination, typically 7-14 business days.

You will receive a tracking number via email once your order ships. Track it via the carrier’s website.

We accept all major credit/debit cards, PayPal, ACH/wire transfers and secure checkout options.

Yes. Net 30 is available for approved customers on second and subsequent orders only. Not available on first orders.

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Description

FOXESS PowerQ 3.97kWh LiFePO4 BATTERY MODULE

Modular, Scalable, and High-Performance LFP Energy Storage

Overview

The FoxESS PowerQ EQ4000 is a high-performance, modular lithium iron phosphate (LiFePO4) battery module specifically designed for the PowerQ All-In-One (AIO) residential energy storage system. This module offers the ultimate in flexibility, allowing homeowners to start with a single module and scale as their energy needs grow.

With its high-voltage stackable design, the PowerQ system supports 2 to 5 modules per stack, providing up to 19.85kWh of storage capacity. For even larger requirements, multiple stacks can be combined to reach a massive 79.4kWh of total system storage.

Engineered for long-term reliability and safety, the EQ4000 utilizes LFP prismatic cells known for their thermal stability and long cycle life. Its plug-and-play configuration ensures a clean, fast installation, while its IP65 rating makes it suitable for both indoor and outdoor floor-mount setups.

Key Features
Scalable LFP battery module offering high round-trip efficiency and flexible stacking for whole-home backup.
  • • 3.97kWh Capacity – Compact but powerful storage per module
  • • Scalable Design – Stack 2-5 modules per unit for up to 19.85kWh
  • • High Efficiency – Superior >95% round-trip efficiency for minimal energy loss
  • • 90% Depth of Discharge – Maximizes usable energy compared to standard batteries
  • • Plug-and-Play Setup – Zero-tool wiring and integrated configuration for fast commissioning
  • • IP65 Weatherproof – Rugged enclosure suitable for indoor and outdoor installations
Specifications
  • Nominal Energy 3.97 kWh
  • Cell Type LiFePO4 Prismatic (LFP)
  • Max Continuous Current 50 A
  • Peak Discharge Current 65 A (60 seconds)
  • Round-Trip Efficiency >95%
  • Dimensions (Per Module) 22.4 x 15.0 x 5.4 in
  • Weight 81.35 lbs
  • Warranty 12.5 Years

FoxESS PowerQ | 3.97kWh LFP Module | Stackable Battery | 90% DoD | IP65 Outdoor Rated | 12.5-Year Warranty | UL 9540 Certified

FAQs

Frequently Asked Questions

1. What is the FoxESS PowerQ 3.97kWh battery module?
It is a modular LiFePO4 (LFP) battery unit designed to stack within the PowerQ system, allowing you to build a custom-sized home energy storage setup.
2. How much energy does one module provide?
Each module provides 3.97 kWh of usable energy, making it easy to scale your system in small increments.
3. How large can the system get?
A single stack supports 2 to 5 modules (7.94 kWh to 19.85 kWh). Multiple stacks can be combined for total system capacity of up to approximately 79 kWh.
4. What size configurations are available?
• 3.97 kWh (1 module)
• 7.94 kWh (2 modules)
• 11.91 kWh (3 modules)
• 15.88 kWh (4 modules)
• 19.85 kWh (5 modules – max per stack)
5. What battery chemistry does it use?
It uses LiFePO4 (LFP) chemistry, known for improved safety, longer lifespan, and better thermal stability compared to standard lithium-ion batteries.
6. How efficient is the system?
The system delivers over 95% round-trip efficiency, minimizing energy loss during charging and discharging.
7. How much of the battery capacity is usable?
Up to 90% depth of discharge (DoD), allowing you to utilize most of the stored energy.
8. Can the system be expanded after installation?
Yes. Additional modules can be added over time, allowing you to scale the system without replacing existing components.
9. Is installation plug-and-play?
Yes. The system is designed with tool-free, plug-and-play connections for faster and simpler installation.
10. Is it suitable for indoor or outdoor installation?
Yes. It is rated IP65, making it suitable for both indoor and outdoor environments when properly installed.
11. Does it include an inverter?
No. This is a battery module only and is designed to work with the FoxESS PowerQ All-in-One system, which includes the inverter.
12. Who is this system best for?
• Homeowners needing scalable energy storage
• Installers building modular battery systems
• Projects requiring flexible, expandable capacity