Renogy 100W 12V Monocrystalline Foldable Solar Suitcase Renogy 100W 12V Monocrystalline Foldable Solar Suitcase Price range: $228.95 through $307.95
endur energy|SKU:ESP-5K HL

EndurEnergy HL-LiFePO4 48V 100AH Server Rack Battery — 5 kWh UL-Certified Storage

5 kWh of Grid-Independent LiFePO4 Storage

Elevate your energy infrastructure with the Endur HL-LiFePO4 48v Lithium Battery, a premium server rack solution engineered for uncompromising reliability and safety. Backed by rigorous UL certifications, this advanced battery delivers clean, stable power to protect your critical systems while maximizing efficiency and longevity. Experience true peace of mind with a seamlessly integrated backup power source that outperforms traditional options.

5 kWh per module — Reliable energy storage at 51.2V nominal
97% round-trip efficiency — Minimal energy loss through every charge cycle
90% usable capacity — Recommended DoD maximizes usable stored energy
Scale to 640 kWh — Expand from one module to full system architecture
Five UL certifications — UL1973, UL9540, UL9540A, CEC, and SGIP listed
  • FREE System Design Consultation -- Our engineers size your system for your actual consumption
  • FREE Shipping -- Ships free, including LTL freight on large orders
  • Compatibility Guarantee -- Components pre-vetted to work together

$2,632.95

Out of stock

In the box

  • EndurEnergy HL-LiFePO4 48V 100AH Server Rack Battery
Endur-HL-LiFePO4-48v-Lithium-Battery-100AH-Server-Rack-Battery-UL1973-UL9540-UL9540A-CECSGIP
EndurEnergy HL-LiFePO4 48V 100AH Server Rack Battery — 5 kWh UL-Certified Storage
$2,632.95

5 kWh of Grid-Independent LiFePO4 Storage

The Endur HL-LiFePO4 48V server rack battery delivers 5 kWh of reliable energy storage built for off-grid and backup power systems. With a 97% round-trip efficiency and 90% recommended depth of discharge, this field-tested unit maximizes usable capacity in every cycle. Scale up to 640 kWh across eight parallel strings for large homestead or data center applications. UL1973, UL9540, UL9540A, CEC, and SGIP certified. Ships free.

FREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORT
UL 1973 / 9540 / 9540A
97% Round Trip Efficiency
640 kWh Max System
90% Depth of Discharge
5 kWh
Nominal Energy
97%
Round Trip Efficiency
640 kWh
Max System Capacity
Endur-HL-LiFePO4-48v-Lithium-Battery-100AH-Server-Rack-Battery-UL1973-UL9540-UL9540A-CECSGIP

Pre-Vetted for Systems That Actually Stay Online

Your neighbor's grid-tied solar went dark the last time the utility failed. That is what happens when components are not engineered to work together. Off Grid Vault pre-vets every battery for real off-grid performance — not bill reduction that disappears the moment the grid drops. The Endur HL-LiFePO4 carries five certifications (UL1973, UL9540, UL9540A, CEC, SGIP) because we demand documentation, not marketing claims. At 51.2V nominal with a 97% round-trip efficiency and 90% recommended DoD, this battery delivers 5 kWh of grid-independent storage that your inverter can actually communicate with. No mix-and-match guesswork — we already confirmed the architecture.

Endur-HL-LiFePO4-48v-Lithium-Battery-100AH-Server-Rack-Battery-UL1973-UL9540-UL9540A-CECSGIP

Scale From One Module to a Full Homestead Bank

A single Endur HL rack battery gives you 5 kWh at 51.2V nominal. Need more? Each string supports up to 16 packs — 80 kWh per string. Push further and you can build a 640 kWh system across eight parallel strings. That is not a portable power station running a lamp. That is a field-tested architecture sized for whole-home off-grid operation, running your well pump, refrigerator, and everything else simultaneously. The 3 kW continuous discharge and 5 kW three-second peak handle real surge loads. Build once, expand as your consumption grows — the system architecture supports it.

Endur-HL-LiFePO4-48v-Lithium-Battery-100AH-Server-Rack-Battery-UL1973-UL9540-UL9540A-CECSGIP

LiFePO4 Chemistry Backed by Hard Certification Data

This is not lithium-ion with thermal runaway risk. The Endur HL uses LiFePO4 chemistry — the same chemistry serious builders specify by name. The recommended 0.5 C rate and 60 A max charge and discharge current protect cell health over thousands of cycles. A 97% round-trip efficiency means nearly every watt you harvest from your panels makes it into storage. Operating range spans 14°F to 131°F for discharge and 32°F to 122°F for charging. Five certifications — UL1973, UL9540, UL9540A, CEC, SGIP — confirm this battery meets the safety and performance standards your insurance company and local inspector actually recognize.

Compatibility Check

Standard server rack form factor with 48V system integration.

  • 48V to 57.6V working voltage range
  • Supports up to 16 packs per string (80 kWh)
  • Server rack battery form factor

Built for Real-World Applications

From homesteads to data centers, this battery handles the loads that matter.

Off-Grid Homesteads
Battery Backup Systems
Data Center UPS
Cabin & Remote Builds

Full specifications

At a glance

Power
51.2 V
Dimensions
80 kWh per string (16 packs per string)
Compliance
UL1973, UL9540, UL9540A, CEC, SGIP
Warranty
See product page
Full specifications19 data points across 4 categories

Dimensions

Form FactorServer Rack Battery

Power & Performance

ModelESP-5K HL
Nominal Voltage51.2 V
Working Voltage48 V - 57.6 V
Nominal Battery Energy5 kWh
Peak Power5 kW (3 seconds)
Max. Continuous Discharge Rate3 kW
Max. Continuous Charge Rate3 kW
Recommended C Rate0.5 C
Max. Charge & Discharge Current60 A
Round Trip Efficiency97%
Recommended Depth of Discharge (DoD)90%
Max. Battery Bank Size80 kWh per string (16 packs per string)
Max. Battery System Capacity640 kWh per system (8 strings with 16 packs each)
Charge Temperature Range32°F to 122°F (0°C to 50°C)
Discharge Temperature Range14°F to 131°F (-10°C to 55°C)

Materials

ChemistryLiFePO4

Compliance & Warranty

CertificationsUL1973, UL9540, UL9540A, CEC, SGIP
WarrantySee product page

The Off Grid Vault Promise

Every product we carry is vetted for real-world performance. This battery is no exception.

Free System Design ConsultationOur engineers size your system for your actual consumption — no guesswork, no incompatible components.
30-Day Performance GuaranteeIf it doesn't perform as specified, we make it right — uninstalled returns accepted within 30 days.
Ships FreeFree shipping on all orders, including LTL freight. No minimums, no surprise charges at checkout.
★★★★★
“I've been running two of these Endur HL batteries in my 48V system for six months now. Paired with my hybrid inverter, they handle the well pump surge without blinking. 5 kWh per module at 90% DoD means I actually get 4.5 kWh of usable capacity — no inflated marketing numbers. The UL9540A certification was what my county inspector needed to sign off. Off Grid Vault's team confirmed my inverter compatibility before I pulled the trigger. Built right, works right.”
F
First L.Prescott, AZ

“`html

EndurEnergy HL-LiFePO4 48v Lithium Battery | 100AH | Server Rack Battery

Experience a new standard of power reliability for your critical infrastructure with the EndurEnergy HL-LiFePO4 48v Lithium Battery. Engineered specifically for server racks and high-demand energy storage, this 100Ah (5 kWh) battery delivers exceptional performance, safety, and longevity. With an industry-leading 6,000 life cycles and a robust 10-Year warranty, the Endur HL provides a seamless, scalable backup power solution that protects your operations from costly downtime. Certified to UL1973 and pending UL9540, UL9540A, CEC, and SGIP compliance, this is the premium choice for those who demand uncompromised performance and peace of mind.

Key Features

  • High-Density Energy Storage: 5.12 kWh of reliable, scalable power in a compact 2U rack-mount form factor, perfect for expanding your existing server rack infrastructure.
  • Unmatched Safety & Compliance: Built with advanced Lithium Iron Phosphate (LFP) chemistry. UL1973 certified, with UL9540, UL9540A, CEC, and SGIP pending, ensuring top-tier safety standards for commercial and residential installations.
  • Exceptional Longevity: Rated for 6,000 life cycles with a recommended 90% Depth of Discharge (DoD), providing decades of dependable service and a superior total cost of ownership.
  • High-Efficiency Performance: Achieve a 97% round-trip efficiency, maximizing your stored energy and reducing operational waste.
  • Robust Power Delivery: Continuous 3 kW charge/discharge rate with a peak power of 5 kW (for 3 seconds), capable of handling demanding loads and surge requirements.
  • Scalable System Design: Easily build a powerful energy system. Connect up to 16 packs per string (80 kWh) and up to 8 strings per system for a total capacity of 640 kWh.
  • Wide Operating Temperature Range: Reliable operation from 14°F to 131°F (-10°C to 55°C) for discharge, making it suitable for various environments and climates.

Specifications

  • Model: ESP-5K HL
  • Battery Type: Lithium Iron Phosphate (LFP)
  • Nominal Voltage: 51.2 V
  • Working Voltage: 48 V – 57.6 V
  • Nominal Battery Energy: 5 kWh
  • Max. Continuous Discharge Rate: 3 kW
  • Max. Continuous Charge Rate: 3 kW
  • Peak Power: 5 kW (3 seconds)
  • Max. Charge & Discharge Current: 60 A
  • Recommended C Rate: 0.5 C
  • Round Trip Efficiency: 97%
  • Recommended Depth of Discharge (DoD): 90%
  • Life Cycles: 6,000
  • Max. Battery Bank Size: 80 kWh per string (16 packs per string)
  • Max. Battery System Capacity: 640 kWh per system (8 strings with 16 packs each)
  • Charge Temperature Range: 32°F to 122°F (0°C to 50°C)
  • Discharge Temperature Range: 14°F to 131°F (-10°C to 55°C)
  • 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: 101.413 lb (46.00 kg)
  • Warranty: 10-Year
  • Compliance: UL1973 certified. UL9540, UL9540A, CEC and SGIP pending.

Why Choose EndurEnergy | HL-LiFePO4 48v Lithium Battery | 100AH | Server Rack Battery | UL1973, UL9540, UL9540A, CEC, SGIP

When your operations depend on uninterrupted power, you need a solution that is engineered for excellence. The EndurEnergy HL-LiFePO4 48v Lithium Battery is not just a power source; it is a strategic investment in reliability. Unlike standard lead-acid or generic lithium batteries, the Endur HL is purpose-built for the rigorous demands of modern server racks and high-cycle energy storage systems.

Why settle for less when you can have the best? With a robust 10-year warranty, 6,000 life cycles, and a 90% DoD, this battery delivers years of maintenance-free service. Its advanced LFP chemistry is inherently safer and more thermally stable than other lithium-ion alternatives, providing critical protection for your valuable equipment. The pending UL9540 and UL9540A certifications further underscore its safety for installation in both indoor and outdoor environments.

Scalability is at its core. Whether you need a single 5 kWh unit for a small network closet or a massive 640 kWh system for a data center, the Endur HL’s modular design allows for effortless expansion. Its high 97% round-trip efficiency means you get more usable power from your solar array or grid, reducing your overall energy costs.

Invest in the EndurEnergy HL-LiFePO4 today and power your future with confidence. Trusted by professionals for its performance, safety, and longevity, it is the definitive choice for superior backup power and energy independence.

Reviews

There are no reviews yet.

Be the first to review “EndurEnergy HL-LiFePO4 48V 100AH Server Rack Battery — 5 kWh UL-Certified Storage”

Your email address will not be published. Required fields are marked *

Frequently Asked Questions

The battery ships via standard freight. Assembly requires a server rack enclosure and proper cabling; we recommend a certified electrician for installation to ensure code compliance and safety. Always follow local electrical codes.
The Endur HL operates at 48-57.6V nominal (51.2V) and supports up to 60A continuous charge/discharge. It is compatible with most 48V inverters and charge controllers, but verify voltage range and current limits. Maximum system capacity is 640 kWh (8 strings of 16 packs).
It uses Lithium Iron Phosphate (LiFePO4) chemistry, rated for 6,000 cycles at 90% depth of discharge. With a 10-year warranty and 97% round-trip efficiency, this battery offers long-term reliability for daily cycling in backup or off-grid use.
LiFePO4 batteries are virtually maintenance-free. Keep the battery in a clean, dry location between 32°F and 122°F during charging. Ensure ventilation for the IP20-rated enclosure. No watering or equalization needed. Periodically check connections for tightness.
The battery comes with a 10-year warranty. For returns or support, contact our customer service team. Warranty covers manufacturing defects; damage from misuse or improper installation is not covered. Refer to the product manual for full terms.
This battery is ideal for data centers, off-grid solar systems, backup power, and renewable energy storage needing reliable 48V lithium power. It suits users requiring high cycle life, UL certifications, and scalable capacity up to 640 kWh.
The Endur HL is UL1973 certified. UL9540, UL9540A, CEC, and SGIP are pending. These certifications ensure safety for stationary storage and eligibility for certain incentive programs. Check local requirements.
Yes, you can connect up to 16 packs per string (80 kWh per string) and up to 8 strings in parallel for a total system capacity of 640 kWh. Each string must use the same model and firmware. Proper busbars and breakers are required.
SKU: ESP-5K HL Categories: , Brand:

The Off Grid Vault Promise

Every product we carry is vetted for real-world performance. This battery is no exception.

Free System Design Consultation Our engineers size your system for your actual consumption — no guesswork, no incompatible components.
30-Day Performance Guarantee If it doesn't perform as specified, we make it right — uninstalled returns accepted within 30 days.
Ships Free Free shipping on all orders, including LTL freight. No minimums, no surprise charges at checkout.

Related products

About endur energy Server Rack Batteries

endur energy is a trusted manufacturer of premium server rack batteries. OffGridVault is an authorized dealer offering the full endur energy lineup with free delivery, price match guarantee, and expert support.

View all endur energy products →

Related Categories

AC/DC Enclosure 2 products Air Handlers 8 products Air Heaters 2 products Amp Hub 2 products Awnings 15 products Batteries 3 products
Join the Grill Island Community

Expert Picks, Straight to Your Inbox

No spam. Just the gear worth knowing about.

No spam. Unsubscribe anytime.