Rack-Mounted LiFePO4 Batteries

Rack-mounted LiFePO4 shelves are how you scale past a wall box — CMX Battery builds modular 48V units you stack in a cabinet to 30 kWh and beyond, for serious home or small C&I storage.

Overview

Rack-mounted batteries put standardized 48V (51.2V) LiFePO4 modules on a shelf in a cabinet, so capacity grows by adding a tray rather than bolting another wall box. CMX Battery builds them for homes that want 20–30+ kWh and for small C&I sites; the modules are the same 5.12kWh building blocks we use elsewhere, validated for IR balance so a stack stays predictable. Rack form shines when you outgrow wall space or want serviceability — a single tray swaps without disturbing the rest.

Key specifications

Specification	Value	Why it matters
Voltage	48V (51.2V) modules	Same block as wall units.
Capacity	Scale per tray to 30+ kWh	Modular shelves.
Form	Rack/cabinet, IP65	Server-style or battery cabinet.
BMS	Per-module + system comms	CAN/RS485.
Serviceability	Tray-level swap	One tray services without disturbing others.

Typical applications

High-usage homes: 20–30+ kWh daily.
Small C&I: Backroom rack banks.
Expandable retrofits: Add trays as needs grow.
Off-grid cabins: Large bank in a cabinet.

How to specify & buying guide

Choose a rack or cabinet rated for the tray count and weight you plan to reach.
Parallel identical modules with equal cabling; the system BMS should see each tray.
Match the inverter's 48V range and current limit to the stacked capacity.
Plan ventilation/clearance per the enclosure's IP and thermal rating.

Engineering & manufacturing at CMX Battery

Residential systems are built around a 48V (51.2V) LiFePO4 core with a hybrid inverter interface, backup transfer and safe indoor/outdoor enclosure. We size for daily cycling and backup autonomy, and document the system for IEC62619 and UL9540A so your installers can pass inspection.

Certifications & compliance

UN38.3 — Mandatory lithium battery transport test (altitude, thermal, vibration, shock, external short). Required for any cross-border shipment.
IEC62619 — International safety standard for industrial Li-ion cells and batteries; expected by EU and most APAC buyers.
UL1973 — North American safety standard for stationary lithium battery systems.
CE — EU declaration of conformity for the applicable directives.
RoHS — Restriction of hazardous substances in the battery and BMS.
IP65 — Dust-tight and low-pressure water-jet resistant — suitable for outdoor enclosures.

Frequently asked questions

How much can a rack hold?

As many trays as the cabinet rating allows — commonly 30+ kWh in a single cabinet.

Is it better than wall-mounted?

For capacity and serviceability yes; for space-saving, wall units win. Pick by kWh and room.

Can I mix old and new trays?

Only identical modules (same Ah, firmware); mixing ages causes imbalance.

What inverter pairs with it?

Any 48V hybrid or off-grid inverter covering the 51.2V LFP window and current.

Request a quote

Send us your voltage, capacity, dimensions, certification target and annual volume. Our engineering team returns a proposal within three working days. Start your RFQ or review our custom pack capabilities.