Darfon Solar LiFePO4 batteries on a pallet
Darfon Solar server rack lithium iron phosphate battery
IFR26650 cells from a Darfon Solar battery
Server racks for solar batteries

48 Volt 50Ah Lithium Iron Phosphate (LiFePO4) Server Rack Batteries

We have 19 in stock.
Regular price $800.00 Sale price$500.00
Shipping calculated at checkout.

  • In stock, ready to ship
  • Inventory on the way

JUST IN! Darfon Solar 2.4kWh 48 volt LiFePO4 server rack batteries. These came in for electronics/BMS issues and likely no longer communicate. They've been fully tested and are all dead on at 50 Ah per cell-string! They have IFR26650 cells in them.

These are sized for a typical 18.5" server rack and 3U (5.25") height. These are smart batteries with RS232 and CAN communication as well as two pairs of Amphenol HVSP-0R6-MHX connectors for power transmission. Part of their B12LF series rack system.

There is one outlier that is 2U (2.5") height and has what appear to be prismatic cells. We haven't disassembled to check, though.

NOTE: We have two server racks for sale for those local to our Phoenix-area shop. Please contact us if you are interested to purchase together. We can install the batteries into the rack(s). Each rack can hold 6 batteries for 14.4kWh of storage.


  • Chemistry: Lithium Iron Phosphate (LiFePO4, LFP)
  • Voltage: 48v nominal, 37.5v minimum - 54f maximum
  • Series: 15s
  • Amp-Hours: 50 Ah
  • Dimensions: 18.75"W x 16.5"D x 5.25"H
  • Weight: 65 lb
  • Cycle rating: 6000 cycles

About Us

Higher Wire Inc. gives new life to old lithium batteries and is revolutionizing the way the world views sustainable energy. We're solving environmental and supply-chain concerns by creating innovative technologies that make energy storage and generation more efficient and accessible, such as our patent-pending process to reintegrate batteries into Second Life applications. We safely disassemble used lithium battery packs and evaluate the individual cells within. Those which meet our strict grading criteria are repurposed into other forms of energy storage, which requires less energy and generates no chemical waste as compared to end-of-life recycling. We provide comprehensive solutions for municipalities, e-waste processing centers and battery end users to minimize their burden for processing, as well as design, engineering, installation and maintenance when deploying our Second Life systems.


We ship the majority of our orders by the next business day. Lithium batteries may take up to two business days to process to accommodate inspection and logging into our system.

Our shipping rates are based on the weight of all ordered products plus estimated weight of packaging. We make every effort to forecast an accurate shipping cost, but cannot be 100% certain in all cases. Please contact us at sales@higherwireenergy.com with any questions prior to purchase.

We pack and label all lithium battery shipments in accordance with Federal Regulation 49CFR173.185, as well as USPS Publication 52 Hazard Class 9 or UPS/Fedex guidelines. Unless otherwise stated, lithium batteries are not eligible for free shipping.

We try to pack all items in an order in a single box, however we may on occasion need to ship items separately. Special shipping does not apply to lithium ion batteries, and orders that include batteries may not qualify for free or expedited shipping.

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.