Fortress Power eForce 28.8kWh Stackable Outdoor Battery System eForce 28.8

Fortress Power eForce 28.8kWh Stackable Outdoor Battery System eForce 28.8

Regular price $14,275
50 IN STOCK
Leave a Review

Fortress Power eForce 28.8kWh Stackable Outdoor Battery System eForce 28.8

Fortress Power eForce 28.8kWh Stackable Outdoor Battery System eForce 28.8

Available
MPN No: eForce 28.8 Outdoor
Regular price $14,275

1
2
3
4
5
6

Shipping calculated at checkout. About shipping

delivery icon
Expected ship date Jun 11 - 18

Ships from U.S. Warehouse

Trusted by Thousands

Expert U.S. Support

delivery icon

We offer multiple secure payment options for your convenience

American Express Apple Pay Diners Club Discover Google Pay JCB Mastercard PayPal Venmo Visa
delivery icon

We offer multiple secure payment options for your convenience

American Express Apple Pay Diners Club Discover Google Pay JCB Mastercard PayPal Venmo Visa
Data Sheet
Warranty Guide
User Manual

View full details
Regular price $14,275
Notice: Long Lead Time - Arriving Late May 2026

Fortress Power eForce 28.8kWh Stackable Outdoor Heated Home Battery System

(eWay for AC and DC wire management NOT included)

Key Features

  • 28.8 kWh Usable Energy Capacity: Combines three 9.6 kWh modules for substantial energy storage.

  • 48V Lithium Iron Phosphate (LFP) Chemistry: Ensures high safety, long lifespan, and reliable performance.

  • Scalable Design: Supports parallel connection of up to 16 units, achieving a total capacity of up to 153.6 kWh.

  • High Charge/Discharge Rates: Closed-loop discharge at 360A and open-loop maximum charge/discharge at 585A, with a surge discharge power of 43,200W for 10 seconds.

  • Seamless Integration: Compatible with Fortress Power Envy inverters and other 48V systems.

  • Integrated eWay: Features built-in busbars, conduit ports, an emergency switch, and real-time status LEDs for streamlined connectivity.

  • All-Weather Design: IP65-rated enclosure with built-in temperature-controlled heating, suitable for diverse environmental conditions.

  • Smart Connectivity: Offers RS485, Wi-Fi, and CAN communication interfaces for remote monitoring and control.

  • Flexible Installation Options: Supports ground-mount, floor-standing, and wall-hung configurations (wall-mount accessory sold separately).

  • 10-Year Warranty: Backed by a comprehensive manufacturer warranty for peace of mind.

Best Applications

  • Whole-Home Energy Storage: Ideal for residential setups requiring reliable backup power and energy independence.

  • Off-Grid and Microgrid Systems: Suitable for installations aiming for self-sufficiency and renewable energy utilization.

  • Scalable Commercial Projects: Perfect for businesses seeking expandable energy storage solutions.

Technology Highlight

The eForce 28.8 kWh system utilizes advanced lithium iron phosphate (LFP) technology, renowned for its safety, durability, and efficiency.

Each stack connects via the eWay, an integrated wireway featuring built-in busbars, conduit ports, an emergency switch, and real-time status LEDs, facilitating streamlined connectivity and enhanced system management.

The system's modular design allows for effortless scalability, enabling users to expand their energy storage capacity as needed.

About Fortress Power

Fortress Power is a leading provider of innovative energy storage solutions, specializing in safe, reliable, and scalable lithium battery systems. Committed to advancing renewable energy technologies, Fortress Power delivers products that empower homes and businesses to achieve energy independence and efficiency.

Technical Specifications

Specification Details
Nominal Energy 28.8 kWh
Nominal Voltage 48V
Nominal Capacity 600Ah (3 × 200Ah)
Operating Voltage Range 39V–54V
Closed-Loop Charge/Discharge 360A / 480A
Open-Loop Charge/Discharge 300A / 300A
Max Charge/Discharge Current 390A / 390A
Surge Discharge Power (10s) 43,200W
Cycle Life @ 70% EOL 8,000 cycles
Communication Interfaces RS485, Wi-Fi, CAN
Dimensions (W × D × H) 24.4 × 9.4 × 72.9 in 
Weight 705 lbs 
Operating Temperature Range -4°F to 140°F (-20°C to 60°C)
Ingress Protection Rating IP65
Certifications UL1741, UL1973, UL9540, UL9540A, UN38.3
Mounting Options Ground-mount, floor-standing, wall-hung (accessory required)
Warranty 10 years


Why Buy From US Solar Supplier?

As an American founded company out of Kentucky, US Solar Supplier is committed to providing top-quality solar products, backed by the world’s leading manufacturers. Our promise is to get you the fairest price from the best brands that offer warranties you can count on. We are updating our inventory daily with solar components that offer the latest technology. With a reputation for excellence and a dedication to customer satisfaction, we ensure that every product we sell meets the highest standards in the industry.

Need Assistance?
We’re here to help! If you have any questions or need more information before making your purchase, don’t hesitate to call us at 1-800-230-7004. Our knowledgeable and friendly team is ready to assist you with product details, installation advice, or the purchasing process.

Why Buy From Us?
Trusted Supplier: We work with Tier 1 manufacturers who stand behind their products.

Expert Support: Our team is here to guide you every step of the way.

Manufacturer-Backed Warranties: Enjoy peace of mind with the 10-year product warranty
directly from the manufacturer.

Easy and Secure Checkout: Your information is protected with top-notch security for a smooth, worry-free transaction.

Join the many satisfied customers who have trusted us for their solar needs. Add to your cart now to secure your high-efficiency solar panels and take the next step towards sustainable energy!