Does this device come with only the rack mount option, or also the vertical stands/legs shown in the picture?

APC SMX-1500 is provided with both the legs for floor mount as show in the photos *and* the rack mount ears. You can use one or the other--or switch back and forth if you want.

Is this product the same as a APC Smart Ups x 120V Ext Bat Pk Rk/TWR? The manufacturer number I have is SMX120RMBP2U.

No: this listing is for the main SmartUPS device--which includes batteries. This device accepts an external battery pack like the one you list--which has only batteries and will not function as a UPS alone. You plug a battery pack into the rear of a UPS to extend the amount of time it will last.

IS this product the same as a APC Smartups X120V Extt Bat Pk RK/TWR?

No: this is an actual UPS--not a battery pack used to extend run-time for a UPS.

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APC;SMX1000;APC SMX1000 Datasheet - Octopart

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APC UPS, 1000 VA Smart-UPS Sine Wave UPS Battery Backup with Extended Run Option, Tower/2U Rackmount Convertible, Line-Interactive, 120V (SMX1000)

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1000 VA / 800W Pure Sine Wave UPS Battery Backup
Smart-UPS Extended Run Option: Extended run models accept external battery packs (model SMX48RMBP2U, sold separately) for a longer runtime, to power critical servers, security, and comm. systems through prolonged outages
Input: NEMA 5-15P. Output: NEMA 5-15R (8)
Tower. 2U Rackmount convertible (rail kits sold separately, part# AP9625)

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APC Smart-UPS X 1000VA Rack/Tower LCD 120V. 800 Watts / 1000 VA,Input 120V / Output 120V, Extended runtime model, Rack Height 2 U

Model
Brand	APC
Series	Smart-UPS X
Model	SMX1000

Input
International Version	120V
Input Voltage Range	82 - 143V
Input Frequency	50/60 Hz +/- 3 Hz (auto sensing)
Input Connection	NEMA 5-15P

Output
VA Rating	1000 VA
Watts	800 Watts
Output Voltage	120V
Output Frequency	50/60 Hz +/- 3 Hz
Outlets	8
Outlet Type	NEMA 5-15R

Battery
Battery Type	Sealed Lead Acid
Battery Run Time	800W: 8.1 min
Battery Recharge Time	3 hour(s)
Battery Replaceable	CURK116-01-02

Details
Alarms	Alarm when on battery: distinctive low battery alarm: overload continuous tone alarm
Interface Port	Smart-Slot, USB
Approvals	cUL Listed, UL 1778
Rackmountable	2U

Surge Protection
Surge Energy Rating	600 Joules

Features
Features	Auto recognition of external batteries UPS recognizes when external battery packs are attached and automatically adjusts runtime. Cold-start capable Provides temporary battery power when the utility power is out. Energy meter Provides actual kilowatt hours of usage for energy conscious users. EPO Attach the device to an Emergency Power Off (EPO) system so that power can be turned off in an emergency situation. Green mode Unique operating mode that bypasses unused electrical components in good power conditions to achieve very high operating efficiency without sacrificing any protection. High frequency design Reduces or eliminates bulky transformers resulting in lighter units for ease of handling. High online efficiency Reduces utility costs, generates less heat. Intuitive LCD interface Provides clear and accurate information in multiple languages with the ability to configure the UPS locally with easy to use navigation keys. Multiple switched outlet groups Multiple outlet groups that may be controlled separately from the UPS for discrete reboot of hung devices, sequenced on/off and non-critical load shedding. Plug-and-Play external batteries Ensures clean, uninterrupted power to the loads when adding extra runtime to the UPS. Predictive replace battery date Dynamically provides the month and year when battery replacement is recommended to aide in long term maintenance planning. Pure sine wave output on battery Simulates utility power to provide the highest degree of compatibility for active PFC (power factor corrected) servers and sensitive electronics. Rack/Tower convertible Protects the initial investment in the UPS when migrating from tower to rack-mount environment. Scalable runtime Allows additional run time to be quickly added as needed. SmartSlot Customize UPS capabilities with management cards. Temperature-compensated battery charging

Dimensions & Weight
Dimensions	17.01" x 3.50" x 19.29"
Weight	50.40 lbs.

Package Contents
Package Contents	Accessories: CD with software, Documentation CD, Installation guide, Rack Mounting brackets, Removable support feet, Smart UPS signalling RS-232 cable, USB cable

Additional Information
First Listed on Newegg	September 22, 2025

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APC UPS, 1000 VA Smart-UPS Sine Wave UPS Battery Backup with Extended Run Option, Tower/2U Rackmount Convertible, Line-Interactive, 120V (SMX1000)

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Item#: 9SIAFJ8KKP4310

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APC UPS, 1000 VA Smart-UPS Sine Wave UPS Battery Backup with Extended Run Option, Tower/2U Rackmount Convertible, Line-Interactive, 120V (SMX1000)

Learn more about the APC SMX1000

Customer Reviews of the APC SMX1000

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

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Manufacturer Contact Info