Skip to content

EndurEnergy | ESP-5100 & ESP-5K | Residential Battery | 5.12 kWh, UL-Compliant

Get it between

Notify me when back in stock

Free Shipping

On All Products

Easy 30 Day Returns

Return with Ease

Secure Checkout

Secure Payment

At Crisis Comforts, we are committed to providing you with the best prices online. If you find a lower price for the same product, we guarantee to match or beat that price.

How it Works:

1. Eligibility: This guarantee applies to select products in our store.

2. Contact Us: Reach out to us via email or chat with your price match request.

3. Proof Required: Please provide a screenshot, link, or any other evidence of the lower price
before making your purchase.

For full details, refer to our Price Match Policy Rules.

At Crisis Comforts, we take pride in offering the best refund and return policies in the industry. If you're not satisfied with your purchase for any reason, you may return it to us within 30 days for a refund.

How it Works:

1. Initiate a Return: If there are any issues with your order, such as missing components, damages, or a non-functioning product, please contact us as soon as possible.

2. Troubleshooting: Some issues can be resolved by reviewing the product manual or our product FAQs.

3. Contact Us: Reach out via email or chat for assistance.

For full details, refer to our Refunds & Return Policy.

Order Processing

Once we receive your order, we will send you a confirmation email. We will then process your order by confirming that the product is in stock and ready for shipment. If any of the items in your order are back-ordered, we will reach out to you via email or phone, and you may choose to either wait or receive a 100% refund.

Please allow 1-3 days for processing your order.


Shipping times and methods will depend on the specific product and brand you purchase. If you have any shipping questions, feel free to ask on the chat or email us at

We will send tracking information by email the same day the shipping tracking number is created/available.

Before you sign the shipping bill, please THOROUGHLY INSPECT YOUR ITEM. Signing for the receipt of a damaged product removes the liability of the shipping company and Crisis Comforts. Once you accept your shipment as non-damaged, your item is your property.

Delivery Time

Shipping Timeline listed above is an estimate. Please call or message the web chat for precise ETAs.

EndurEnergy ESP-5100 and ESP-5K Battery Pack | Residential 5.12 kWh DC Battery

Discover the future of secure home energy with EndurEnergy's ESP-5100, the ultimate EMP-hardened Residential Storage Solution. Our EverSure battery system, featuring high-performance batteries and an innovative Battery Management system, ensures power on demand. Crafted with Grade “A” new materials for extended durability, our rack-mount design is not only UL-compliant but also a sleek addition to your energy setup. Backed by a 10-year warranty, 24/7 remote monitoring, and dedicated US support, our integrated solutions pair EverSure batteries with Sol-Ark's state-of-the-art inverter technology for unmatched reliability. Choose the ESP-5100 for a sophisticated, integrated approach to residential energy storage and take control of your power destiny.


  • Model: ESP-5100
  • Nominal Voltage: 51.2 V 
  • Working Voltage : 48 V - 57.6 V 
  • Nominal Battery Energy : 5.12 kWh 
  • Peak Power : 5 kW 3s 
  • Max. Battery Bank Size : 51.2 kWh per string (10 packs per string)
  • Max. Battery System Capacity : 327.68 kWh per system (8 strings with 8 packs each)
  • Recommended C rate : 0.5 C 
  • Round Trip Efficiency : 97% 
  • Recommended DoD : 90% 
  • Charge Temperature Range : 32 °F to 113 °F (0 °C to 45 °C) 
  • Discharge Temperature Range : 14 °F to 122°F (-10 °C to 50 °C) 
  • Life Cycles : 6000 
  • Protection Level : IP20 
  • Size L x W x H: 17.40 x 19.70 x 5.24 in (442 x 500 x 133 mm) 
  • Weight : 92.60 lb (42.00 kg) 
  • Battery Type : Lithium Iron Phosphate (LFP) 
  • Warranty : 10-Year 
  • Compliance : UL9540, UL1973, CEC and SGIP pending

ESP-5100 Manual

ESP-5100 Spec Sheet

ESP-5K Manual

ESP-5K Spec Sheet