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540Ah 39 kWh

SKU: K0243


Product Quantity


57 in stock


4AWG BE175 Extension Cable


19 in stock


Walrus Kits

Compare our lithium battery kits, available in configurations of 1, 2, and 3 units, to find your ideal power solution. Explore their range of amp hours (Ah) and kilowatt hours (kWh) to make an informed decision.

Product information

The BatteryEVO 72V 13 kWh LiFePO4 WALRUS (Battery) Extension Pack

The WALRUS Extension Pack provides an opportunity to increase storage capacity, serving as a sophisticated and portable power solution suitable for various uses, including solar setups, off-grid configurations, and as an emergency power source. This extension pack, when paired with the WALRUS unit, brings an additional 13 kWh of external battery capacity, promising consistent power across a multitude of environments.

Featuring our state-of-the-art Battery Management System (BMS), the WALRUS Extension Pack is optimized for operation in a wide temperature spectrum, making it especially useful in cold weather. Equipped with high-quality LiFePO4 cells and equipped with durable caster wheels, it provides flexible storage options, ensuring you can easily relocate it as needed.

Redefining the standards for battery management and safety within its class, the pack guarantees a steady power supply and upholds the utmost safety protocols. Its built-in LED Smart Display allows for the real-time tracking of battery conditions and performance. Elevate your energy setup and maximize your power capabilities with the WALRUS Battery Extension Pack today!

Tech Spec

System Voltage: AC110/220V
Nominal Voltage: 72V
Chemistry: NMC
kWh Capacity: 13kWh
Ah Capacity: 180Ah
Charging Voltage: 83V - 84V
Max Charge Voltage: 84V
Operating Voltage Range: 60V - 84V
Suggested Low Voltage Cutoff: 60V - 70V
Cell Configuration: 20S3P
Max Continuous Discharge Current: 100A
Max Continuous Power: 8000W
Max Discharge Peak Current: 16000W (3 seconds)
Max Charge Current: 80(DC) / 50A(AC)
Charge Temperature Range: -20°C (-4°F) / 55°C (131°F)
Discharge Temperature Range: -20°C (-4°F) / 55°C (131°F)
Optimal Discharge Temperature Range: 15°C (59°F) / 35°C (95°F)
Storage Temperature Range: -5°C (23°F) / 35°C (95°F) (Max 6 Months)
Weight: 250lbs (113.4kg)
Depth: 21.65in (549.9mm)
Width: 14.35in (364.5mm)
Height: 28.38in (720.7mm)
Safety Features: 63A AC Input Breaker & Battery Management System (Over/Under Voltage, Over Current, & Over/Under Temperature Protections)
Max Connections: Up To (8) Battery Packs with Parallel
Batterty Spec Sheet: View

Suitable for


Our standard shipping process ensures swift order fulfillment, with packages typically dispatched within 24 to 48 hours. Your estimated delivery times are as follows:

  • For the East Coast, please expect delivery within 5 to 7 business days.
  • If you’re in the Central region, you can anticipate your package arriving in 3 to 5 business days.
  • For our West Coast customers, delivery is expedited, with packages expected to reach you in just 2 to 3 business days.

We proudly offer a generous 90-day return and exchange policy, designed to ensure your complete satisfaction with our products.

If you wish to update or change your shipping address, kindly email us your revised shipping details, and we will be more than happy to make the necessary changes in our system to ensure a seamless experience for your future transactions.

Once your order is shipped, an email containing your tracking number and a convenient link to monitor your package’s journey will be promptly sent to you. Keeping you informed every step of the way is our commitment to exceptional service.

We take pride in our dedicated customer service team, poised and ready to address your inquiries between 8:00 AM and 5:00 PM PST. Your satisfaction is our mission, and we’re here to assist you during our business hours.

While our advanced shipping system is designed to detect any incorrect addresses, we understand that changes may arise. Feel free to reach out to us via email or phone to provide us with any updates or corrections to your address. Your convenience is our priority, and we’re here to assist you promptly.

We proudly ship to USA Mainland addresses. Due to the hazmat nature of our batteries, we are currently unable to facilitate international shipping. However, for our international customers, we do offer the flexibility for buyers to arrange their own shipping to their desired destination country. Your convenience and satisfaction remain at the forefront of our service.

As some of our packages may exceed standard shipping dimensions, your order may arrive in multiple packages. To streamline your tracking experience, we provide a Master tracking number, with each individual package’s tracking number conveniently attached for your reference. Your order’s safe and efficient delivery is our top priority.

Additional information

Weight 250 lbs
Dimensions 14.35 × 21.65 × 28.38 in


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