Server Rack 48V 100Ah LiFePO₄ Battery with Active Balancing, LCD, Bluetooth & Smart Comms – WattCycle-US

Direct from Official Store — Full Warranty and Technical Support.

Best-Selling Energy Storage Solution | V2 48V Rack Battery Recommended. 👉>>>

WattCycle V2 48V 100Ah LiFePO₄ Rack Battery – Active Balancing, LCD, Bluetooth & Smart Comms

Sale price $789.99 Regular price $1,599.99
EcoFlow Delta Owner Exclusive: Upgrade Your Delta 3/2/Max can do more. Pair it with the WattCycle 48V Battery + WattLINK-EF Cable bundle and unlock 5,120Wh of instant backup power. Direct plug-and-play through your expansion port—seamless energy expansion. From weekend trips to power outages, you're covered. [Upgrade Now →]
Option

Download

Shipping Service

Thank you for choosing WattCycle for your LiFePO4 battery needs! We understand that getting your batteries quickly and safely is important to you. This policy outlines the shipping process for WattCycle orders.

Destinations:

  • We only ship orders to Continental 
  • Currently we DO NOT ship to Alaska, Hawaii, and Puerto Rico.
  • Please do not use PO Box addresses, which are not within the delivery range of FedEx. If you accidentally use such addresses, please contact us to change them in time to avoid delays in delivery.

Shipping Fee:

  • FREE shipping on all orders
  • Shipping method: UPS Ground & Fedex

Shipping time:

The time frame of an order delivery is divided into two parts:

  • Processing time: 1-2 business days
  • Shipping time: 2-5 business days
  • The shipping will delay for some objective or uncontrolled reasons. We will notice our customer ahead for delays.

Tracking Your Order:

  • Once your order ships, you will receive a confirmation email with a tracking number. You can use this tracking number to track the progress of your shipment on the carrier's website.

Disclaimer:

  • While we strive to meet the estimated delivery times provided, these are estimates and actual delivery times may vary depending on factors beyond our control, such as carrier delays or weather conditions.

Changes to This Policy:

  • We reserve the right to modify this Shipping Policy at any time. We will post any changes to this policy on our website.

We appreciate your support! If you have any questions about our shipping policy, please feel free to contact us at service@wattcycle.com.

Warranty Policy

WattCycle Warranty Policy

Thank you for choosing WattCycle. This warranty policy applies to all products purchased through official WattCycle channels and authorized distributors. Please read this policy carefully before installation and use.

I. Warranty Commitment

WattCycle warrants to the original consumer that under normal use conditions, products shall be free from defects in material and workmanship from the date of original purchase.

1. Warranty Period

Product Category

Specific Model/Series

Base Warranty

Extended Warranty (with Registration)

LiFePO4 Batteries

All new battery models

5 years

2 years (7 years total)

Like-New Products

All like-new models

1 year

Battery Cells

All models

No warranty

Accessories

Chargers, inverters, controllers, wiring cables, etc.

1 year

Note: Extended warranty must be activated through product registration on the official WattCycle website within 3 months of purchase.

2. Warranty Period Calculation

  • The warranty period begins from the original consumer’s purchase date.
  • Valid proof of purchase (order screenshot, invoice, etc.) is required to establish the purchase date.
  • Repaired or replaced products do not extend the original warranty period, which remains based on the original purchase date.

II. Warranty Claim Process and Fees

1. Claim Process

  • Step 1: Contact WattCycle Customer Service (service@wattcycle.com), describe the issue, and provide proof of purchase.
  • Step 2: Our technical team will contact you within 24-48 hours to assist with troubleshooting.
  • Step 3: Once the issue is confirmed as a quality defect, customer service will provide a Return Merchandise Authorization (RMA) number and return instructions.

2. Fee Responsibility Rules

Scenario

Resolution

Shipping Responsibility

Notes

Quality issue (within 6 months)

Free replacement/refund

WattCycle covers shipping costs

Requires quality defect confirmation, valid proof of purchase, within warranty period.

Quality issue (after 6 months, within warranty)

Free replacement

WattCycle covers shipping costs

Requires quality defect confirmation, valid proof of purchase, within warranty period.

Personal reason (return within 30 days)

Return for refund

Customer bears return shipping

Original packaging intact, product in good condition. Warehouse restocking fees will be charged.

Personal reason (return after 30 days)

Return for refund

Customer bears two-way shipping

Warehouse restocking fees and depreciation fees will be charged.

Wrong item shipped / Missing item / Transit damage

Free replacement

WattCycle covers shipping costs

/

Order cancellation (before shipment)

Refund

No shipping charges incurred

/

Over 6 months (non-quality issues)

Returns not accepted

/

/

3. Refund Policy

  • Refunds are applicable only for quality issues reported within 6 months of purchase. Quality issues identified after 6 months will be resolved through product replacement.
  • The refund amount will be calculated after final verification, deducting any applicable fees, and returned via the original payment method.
  • Refunds will be processed via the original payment method within 3-5 business days after receipt and inspection of the returned product.

III. Warranty Exclusions (Limitations of Liability)

This warranty does not apply to damage or malfunction caused by:

1. Accidents and Force Majeure

  • Accidents, abuse, misuse, or negligence
  • Natural disasters such as fire, flood, lightning, earthquakes, extreme temperatures

2. Improper Use and Installation

  • Failure to follow installation, operation, or maintenance instructions in the product manual
  • Voltage/current mismatch, reverse polarity connection
  • Use of incorrect fuses or undersized cables
  • Series or parallel connections exceeding permissible limits (e.g., systems exceeding 48V)
  • Mixing with other battery brands

3. Unauthorized Modifications or Repairs

  • Any disassembly, modification, or repair by unauthorized personnel
  • Altered, damaged, or removed serial numbers

4. Normal Wear and Tear and Commercial Use

  • Cosmetic wear or scratches from normal use.
  • Natural capacity degradation over time (normal aging).
  • Use exceeding the product’s designed cycle life or technical specifications.

5. Long-Term Inactivity

  • Damage resulting from failure to perform periodic charging maintenance for over one (1) year.

6. Other

  • Inability to provide valid proof of purchase.
  • Products that have been fully refunded through other means.

IV. Final Provisions

  • WattCycle reserves the right of final interpretation of this warranty policy.
  • This policy may be revised periodically. All changes will be published on our official website.

Contact Information:

📧 Official Customer Service Email: service@wattcycle.com

🌐 Official Website: www.wattcycle.com

Payment & Security

Payment methods

  • American Express
  • Apple Pay
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Union Pay
  • Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

In his hands-on test, “There’s A Trick For That” described the WattCycle 48V server rack battery as an “incredible bang-for-your-buck” way to massively expand a portable power station—demonstrating how two packs can deliver ~10× the capacity compared with many brand-name OEM expansion batteries, while staying surprisingly compact. He was especially impressed by the large, bright premium screen, app control, and “super legit” advanced BMS settings (with a clear note to keep defaults if you’re not experienced), plus the premium internal build—clean cable management, robust bus bars, multiple temperature sensors, and solid cell compression—saying WattCycle “knocked it out of the park” for the price.

Works with popular portable power stations (EcoFlow / BLUETTI) via common 48V LiFePO4 expansion methods*. Watch his full demo + teardown in the video below.

*Compatibility depends on the specific model and wiring method. Please follow professional guidance and local electrical safety requirements.

The reviewer’s takeaway was simple: this rack battery looks premium, feels well-built, and performs like it should. They specifically praised the phone-like responsive touchscreen (clear live SOC/voltage/current/temps plus cell-level data and alarms), confirmed capacity right around the rated 100Ah, saw stable output under real inverter loads, and liked how fast the BMS protection shut things down during overcurrent/overheat tests. The teardown also backed it up with solid internals—laser-welded connections, heavy busbars, lots of temp sensing, and proper heat sinking/airflow.

Do the best.

Uses BYD battery cells, offering unparalleled safety performance, while enhanced physical structure significantly improves battery life and durability.

High-current active balancing function

WattCycle's active balancing function effectively protects battery cells, improves safety, extends battery pack life, and increases capacity utilization. Ultra-high 3A balancing current: Faster balancing speed, better balancing effect, and better adaptation to large-capacity battery cells.

Second-troubleshooting capability, flexibly handling all situations

Power button and short-circuit valve – one switch handles all emergencies, giving your battery a dual boost of emergency and flexibility! Powerful BMS chip automatically cuts off faults in seconds, promptly responding to short circuits, overloads, and other situations, suitable for safe use in high-power devices.

Multiple Intelligent Monitoring Features

WattCycle 48V 100Ah 3U rack battery supports remote control via a mobile app, and the battery itself features an LCD touchscreen, helping you monitor your battery status in real time.

Customizable system power, compatible with all inverters

WattCycle 48V 100Ah 3U rack lithium battery can be easily expanded to 20 batteries (automatic addressing). Seamless insertion into the 3U rack makes it simple and convenient. Its CAN/RS485/RS232 is compatible with various inverter brands on the market, easily adapting to multiple scenarios, with strong anti-electromagnetic interference capabilities and millisecond-level command interaction.

Modular stacking for seamless capacity expansion

The WattCycle 3U Rack battery is suitable for small spaces with simple plug-and-play functionality. Expansion is as easy as building with blocks, ensuring every inch of space is utilized! Whether for emergency power needs or everyday electricity usage, it provides a continuous and stable power supply, eliminating energy worries.

Only provide the best guarantees and services.

Our products undergo rigorous testing and professional certification. We provide 5 years guarantee, and become a member to receive an additional two-year guarantee. Don't hesitate, owning a WattCycle lithium battery can quickly recoup your investment.

Superior craftsmanship is reflected in the details

WattCycle LiFePO4 batteries use the highest quality core components, featuring a neat internal structure and a metal bracket for enhanced internal stability. Externally, they offer four interface terminals and a detachable handle for easy use, transport, and installation.

Tech Specs

Specifications

Dimensions 19.09 x17.72 x5.24 inch
Weight 91.9lbs
Capacity 100Ah
Energy Storage 5120Wh
Nominal Voltage 51.2V
Self Discharge Rate <3%/Month
Series & Parallel Connections 1 Series(Max), 20 Parallel(Max)

Charging

Max. Charge Voltage 58.4V
Max. Charge Current 100A
Recommend Current 20A
Charging Temperature Protection 23~41°F; 122~140°F
Discharging Temperature Protection -13~5°F; 131~149°F
Short Circuit Current Protection support

Discharging 

Cont. Dischagre Current 100A
Discharge Current 6000@DOD80%

Others

Case Material Steel Plate Cold Common (SPCC)
Certifications IEC/CE/FCC/UL1642/UL2580/UN38.3