APC SMX120RMBP2U Smart UPS - Chassis Only

Upgrade your Smart‑UPS X runtime or replace a failed pack with this APC SMX120RMBP2U external battery pack chassis, sold without batteries and without rail kit. This is a used unit with noticeable cosmetic wear and is best suited for parts, rebuilds, or as a replacement enclosure in an existing rack or tower setup.

Item condition

• Used APC Smart‑UPS X external battery pack enclosure, model SMX120RMBP2U.

• No batteries installed – all internal battery slots are empty.

• No rail kit, no rack ears, and no additional accessories included (no cables, manuals, or brackets).

• Exterior shows scratches, scuffs, and general signs of use from previous rack/tower installation.

• Sold as just the cabinet/chassis for repair, parts, or custom battery rebuild projects.

Key features and specs (for compatible setups)

• Model: APC Smart‑UPS X External Battery Pack SMX120RMBP2U, 120 VDC, 2U rack/tower form factor.

• Designed to connect to APC Smart‑UPS X extended runtime models above 2 kVA (SMX‑series such as SMX2000/2200/3000).

• 2U height enclosure, approximately 3.3–3.4" H x 17" W x 26.3" D (rack‑mount depth; tower convertible).

• Originally uses hot‑swappable sealed lead‑acid battery modules, but this listing includes no batteries.

• Standard black APC Smart‑UPS X finish with front panel designed to stack below an SMX UPS in rack or tower mode.

What’s included

• APC SMX120RMBP2U external battery pack chassis only.

• Front enclosure with internal battery compartment and rear panel connectors as present on the unit.

What’s NOT included

• No batteries or battery cartridges. You will need to source and install compatible replacement batteries separately.

• No rack rail kit, rack ears, or mounting hardware.

• No UPS, no power cables, and no documentation beyond what’s available online from APC.

Compatibility and use case

This SMX120RMBP2U enclosure is intended to be connected to an APC Smart‑UPS X SMX‑series unit that supports external battery packs to extend runtime. Since there are no batteries installed, it is ideal for buyers who already have compatible battery cartridges, want to transplant internals, or need a replacement cabinet for an existing Smart‑UPS X external battery pack setup.