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PRE-ORDER: This item is currently on its way to RUiXU's US warehouse. New stock is expected late November 2026, and pre-orders ship as soon as it arrives.
RUiXU Rack Batteries
20% More Energy in the Same 3U Rack Size
The RUiXU RX-LFP48120 packs 6.14kWh (51.2V, 120Ah) of LiFePO4 storage into the same standard 19-inch 3U rack format as a typical 5kWh module, so a rack that held 5.12kWh per slot now holds 6.14kWh per slot with no extra space, no new cabinet, and no rewiring of your layout.
It adds self-heating for cold charging, Bluetooth app monitoring with over-the-air firmware updates, and a field-replaceable BMS. Connect up to 64 units in parallel to scale from a single module to a serious battery bank. Renewable Outdoors is an authorized RUiXU dealer, and every RX-LFP48120 we sell is backed by RUiXU's 10-year limited warranty. This model is on pre-order: stock reaches RUiXU's US warehouse in late November 2026 and pre-orders ship as soon as it lands.
10-Year Limited Warranty
Price Match Guarantee
Authorized RUiXU Dealer
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0% APR Financing via Affirm
Talk to a Human: (303) 876-7654
Why the RX-LFP48120
6.14kWh in a 3U Slot
120Ah in the same 482 x 133 x 510mm footprint as a 100Ah module: 20% more energy per rack unit, ideal for upgrading an existing rack without expanding it.
Bluetooth App and OTA Updates
Pick the inverter communication protocol right in the RUiXU Battery App over Bluetooth, with automatic addressing for parallel units and wireless firmware updates.
Self-Heating for Cold Charging
Built-in heating pads beneath both cell modules distribute heat evenly, so the battery can accept a charge in cold conditions where standard lithium cannot.
Replaceable BMS
The centrally mounted BMS is directly accessible from the top of the unit, so service means swapping a board instead of replacing the whole battery.
Scales to 64 Units
Parallel up to 64 modules (about 393kWh) with dual steel bands maintaining cell compression to support long cycle life.
Wide Inverter Compatibility
CAN bus support covers Victron, SMA, Sol-Ark, Solis, GoodWe, Deye, Growatt, Sunsynk, Schneider and more, with RS485 for MPP and Voltronic family inverters.
What's Included
In the Box
RUiXU RX-LFP48120 48V server rack battery
Operation manual
Warranty card
Battery-to-battery communication cable (250mm)
Battery-to-battery grounding cable (430mm)
Red positive battery-to-busbar cable, 4AWG (150mm)
Black negative battery-to-busbar cable, 4AWG (150mm)
External power cables, grounding cables and inverter communication cables are selected separately to suit the installation. The RX-LFP48120 fits standard rack brackets and RUiXU's 6-slot and 10-slot battery cabinets.
Figures below are from RUiXU's published specifications for this model.
Model
RX-LFP48120
SKU
RX-LFP48120
Nominal Voltage
51.2V
Nominal Capacity
120Ah
Nominal Energy
6,144Wh (6.14kWh)
Cell Chemistry
LiFePO4 (Lithium Iron Phosphate)
Form Factor
19-inch rack-mount, 3U
Dimensions (W x H x D)
19" x 5.24" x 20.1" (482 x 133 x 510mm)
Expandability
Up to 64 units in parallel
Communication
CAN bus and RS485; Bluetooth 5.1 app monitoring and OTA updates
Self-Heating
Yes, dual heating pads beneath both cell modules
BMS
Field-replaceable, top-access
Certifications
UL1973, UL9540, CEC and SGIP listed
Installation
Indoor; rack, bracket or RUiXU 6-slot / 10-slot cabinet
Warranty
10-Year Limited Warranty
Availability
Pre-order; US warehouse arrival expected late November 2026
RUiXU notes that product specifications are subject to change without notice. Call us at (303) 876-7654 if a figure here is decisive for your purchase and we will confirm it against the current datasheet.
Every RUiXU battery we sell is backed by RUiXU's 10-year limited warranty, and as an authorized RUiXU dealer we can help you navigate a claim if you ever need one.
Price Match Guarantee
Find it cheaper at another authorized RUiXU dealer? Call us before you order and we will take care of you.
Help From People Who Sell These Every Day
Call (303) 876-7654. We would rather spend ten minutes helping you pick the right setup than process a return later.
RX-LFP48120 Questions
How much more capacity is this than the RX-LFP48100?
The RX-LFP48120 stores 6.14kWh against the RX-LFP48100's 5.12kWh, about 20% more, in the same 3U rack size. It is the pick when your rack space is fixed but you want more runtime per slot.
How many can I connect together?
Up to 64 units in parallel, roughly 393kWh, with automatic battery addressing set through the Bluetooth app to keep setup simple as the bank grows.
Does it work with my inverter?
Very likely. CAN bus protocols cover Victron, SMA, Studer Innotec, Sofar, Sol-Ark, Solis, GoodWe, Deye, Growatt, SAJ, LuxPower, Megarevo, Sermatec, TBB, MUST, Sunsynk and Schneider, and RS485 covers MPP, Voltronic, RCT and Alpha Outback. Call us at (303) 876-7654 with your inverter model and we will confirm before you order.
Can it charge in the cold?
Yes. Dual heating pads under both cell modules warm the cells evenly so the battery can accept a charge in cold conditions, and the BMS is replaceable from the top of the unit if service is ever needed.
When will my RX-LFP48120 ship?
This model is on pre-order. RUiXU expects US warehouse stock in late November 2026, and pre-orders ship as soon as it arrives.
Is Renewable Outdoors an authorized RUiXU dealer?
Yes. Renewable Outdoors is an authorized RUiXU dealer, so your battery ships brand new with the full RUiXU 10-year limited warranty and full manufacturer support.
Do you offer a price match?
Yes. Our Price Match Guarantee means if you find the same item cheaper at another authorized dealer, call us at (303) 876-7654 before you order and we will take care of you.
