Skip to main content
  • In Stock
Brands
Show More
VA Rating
Watts
Outlets
Show More
Battery Run Time
Interface Port
Show More
Rackmountable
Battery Type
All Top Brands
Availability
Useful Links
Customer Ratings
Sort By:
View:
CyberPower ST425 Standby UPS Systems - 425VA/260W, 120 VAC, NEMA 5-15P, Compact, 8 Outlets
Quick View
CyberPower ST425 Standby UPS Systems - 425VA/260W, 120 VAC, NEMA 5-15P, Compact, 8 Outlets
  • Outlets: 8
  • Battery Run Time: Runtime at Full Load: 1.5 min Runtime at Half Load: 6 min
  • Output Frequency: 50/60 Hz +/- 1%
  • Battery Recharge Time: 8 Hours
  • Model #: ST425
Tripp Lite SMART1500LCD Series Smart LCD 1500VA 900W 120V Line-Interactive UPS - 8 Outlets, USB, DB9, 2U Rack/Tower - 2U Rack/Tower - 8 Hour Recharge - 3.50 Minute Stand-by - 110 V AC Input
Quick View
Tripp Lite SMART1500LCD Series Smart LCD 1500VA 900W 120V Line-Interactive UPS - 8 Outlets, USB, DB9, 2U Rack/Tower - 2U Rack/Tower - 8 Hour Recharge - 3.50 Minute Stand-by - 110 V AC Input
  • Outlets: 8
  • Battery Run Time: Full load runtime: 4.4 minutes (900 Watts) Half load runtime: 11.8 minutes (450 Watts)
  • Output Frequency: 60 Hz
  • Battery Recharge Time: Less than 4.5 hours from 10% to 90%
  • Model #: SMART1500LCD
APC BR1350MS Back-UPS Pro, 1350VA/810W, Tower, 120V, 10x NEMA 5-15R outlets, Sine Wave, AVR, USB Type A + C ports, LCD, User Replaceable Battery - Tower-16 Hour Recharge - 3.30 Minute Stand-by
Quick View
APC BR1350MS Back-UPS Pro, 1350VA/810W, Tower, 120V, 10x NEMA 5-15R outlets, Sine Wave, AVR, USB Type A + C ports, LCD, User Replaceable Battery - Tower-16 Hour Recharge - 3.30 Minute Stand-by
  • Outlets: 10
  • Battery Run Time: Half Load: 11.4 Minutes Full Load: 3.3 Minutes
  • Output Frequency: 60 Hz +/- 3 Hz
  • Battery Recharge Time: 16 Hour(s)
  • Model #: BR1350MS
CyberPower CP2000PFCRM2U PFC Sinewave UPS Systems
Quick View
CyberPower CP2000PFCRM2U PFC Sinewave UPS Systems
  • Outlets: 8
  • Battery Run Time: 2.2 min Runtime at Full Load 9.0 min Runtime at Full Load
  • Output Frequency: 60 Hz +/- 1%
  • Battery Recharge Time: 8 Hours
  • Model #: CP2000PFCRM2U
  •  
  • ¥79,893 
  • ¥22,861 Shipping
APC BE550G Back-UPS ES 550VA, 120V, 8 NEMA outlets (4 surge) - Tower - 1 Day Recharge - 3.30 Minute Stand-by - 120 V Input - 120 V AC Output - Stepped Approximated Sine Wave - USB - 4 x NEMA 5-15R
Quick View
APC BE550G Back-UPS ES 550VA, 120V, 8 NEMA outlets (4 surge) - Tower - 1 Day Recharge - 3.30 Minute Stand-by - 120 V Input - 120 V AC Output - Stepped Approximated Sine Wave - USB - 4 x NEMA 5-15R
  • Outlets: 8
  • Battery Run Time: Runtime: 3.2 minutes Load: 330 W
  • Output Frequency: 50/60 Hz +/- 3 Hz
  • Battery Recharge Time: 24 Hour(s)
  • Model #: BE550G
CyberPower 1500RTXL2U Smart App Online UPS - 1500VA/1350W, 100 - 125 VAC, NEMA 5-15P, 2U, Rack / Tower, Sine Wave, 8 Outlets, LCD, PowerPanel Business
Quick View
CyberPower 1500RTXL2U Smart App Online UPS - 1500VA/1350W, 100 - 125 VAC, NEMA 5-15P, 2U, Rack / Tower, Sine Wave, 8 Outlets, LCD, PowerPanel Business
  • Outlets: 8
  • Battery Run Time: 11 Minutes (Runtime at Half Load) 3.4 Minutes (Runtime at Full Load)
  • Output Frequency: 50 / 60Hz (Auto-Sensing or Configurable) +/- 0.25Hz
  • Battery Recharge Time: 4 Hour(s)
  • Model #: OL1500RTXL2U
CyberPower CP800AVR AVR UPS Systems - 800VA/450W, 120 VAC, NEMA 5-15P, Compact, 8 Outlets, PowerPanel
Quick View
CyberPower CP800AVR AVR UPS Systems - 800VA/450W, 120 VAC, NEMA 5-15P, Compact, 8 Outlets, PowerPanel
  • Outlets: 8
  • Battery Run Time: Runtime at Half Load (min): 13.5 Runtime at Full Load (min): 3
  • Battery Recharge Time: 8 Hour(s)
  • Series: AVR
  • Model #: CP800AVR
CyberPower CP685AVRG AVR UPS Systems - 685VA/390W, 120 VAC, NEMA 5-15P, Compact, 8 Outlets, PowerPanel® Personal
Quick View
CyberPower CP685AVRG AVR UPS Systems - 685VA/390W, 120 VAC, NEMA 5-15P, Compact, 8 Outlets, PowerPanel® Personal
  • Outlets: 8
  • Battery Run Time: At Full Load: 11 Minutes At Half Load: 2 Minutes
  • Output Frequency: 60 Hz +/- 1%
  • Battery Recharge Time: 8 Hour(s)
  • Model #: CP685AVRG
  •  
  • ¥25,073 
  • ¥33,767 Shipping
APC BR1500MS2 Back-UPS Pro 1500VA/900W, Tower, 120V, 10x NEMA 5-15R outlets, AVR, USB Type A + C ports, LCD, User Replaceable Battery -Tower - AVR - 16 Hour Recharge -4.10 Minute Stand-by -120 V Input
Quick View
APC BR1500MS2 Back-UPS Pro 1500VA/900W, Tower, 120V, 10x NEMA 5-15R outlets, AVR, USB Type A + C ports, LCD, User Replaceable Battery -Tower - AVR - 16 Hour Recharge -4.10 Minute Stand-by -120 V Input
  • Outlets: 10
  • Battery Run Time: Backup/Run Time (Half Load) 14.50 Minute Backup/Run Time (Full Load) 4.10 Minute
  • Output Frequency: 60 Hz +/- 3 Hz
  • Battery Recharge Time: 16 hour(s)
  • Model #: BR1500MS2
Eaton 5PX G2 1500VA 1500W 208V Line-Interactive UPS 8 C13 Outlet 2U 5PX1500HRTG2
Quick View
Eaton 5S1000LCD  5S UPS 1000VA 600 Watt 120V LCD Line-Interactive Battery Backup ECO USB - Tower - 3 Minute Stand-by - 110 V AC Input - 115 V AC Output - 10 x NEMA 5-15R
Quick View
Eaton 5S1000LCD 5S UPS 1000VA 600 Watt 120V LCD Line-Interactive Battery Backup ECO USB - Tower - 3 Minute Stand-by - 110 V AC Input - 115 V AC Output - 10 x NEMA 5-15R
  • Outlets: 10
  • Battery Run Time: Run Time at Full Load: 3 mins Run Time at Half Load: 14 mins
  • International Version: 120V
  • Input Voltage Range: 93 - 138V
  • Model #: 5S1000LCD
  •  
  • ¥48,627 
  • ¥57,486 Shipping
EATON 5S1500G 1500 VA 900 Watts 8 Outlets UPS
Quick View
EATON 5S1500G 1500 VA 900 Watts 8 Outlets UPS
  • Outlets: 8
  • Input Voltage Range: 175 V AC to 275 V AC 230 V AC Nominal
  • Input Frequency: 50/60 Hz
  • Input Connection: (1) IEC-320-C14
  • Model #: 5S1500G
Eaton 5PX G2 1950VA 1950W 120V Line-Interactive 6-Outlet UPS 5PX2000RTNG2
Quick View
Tripp Lite INTERNET350U Series 350VA 210W Standby UPS - 6 NEMA 5-15R Outlets, 120V, 50/60 Hz, USB, 5-15P Plug, Desktop/Wall Mount - Ultra-compact Desk-mount - 4 Hour Recharge - 2 Minute Stand-by
Quick View
Tripp Lite INTERNET350U Series 350VA 210W Standby UPS - 6 NEMA 5-15R Outlets, 120V, 50/60 Hz, USB, 5-15P Plug, Desktop/Wall Mount - Ultra-compact Desk-mount - 4 Hour Recharge - 2 Minute Stand-by
  • Outlets: 6
  • Battery Run Time: Half Load Runtime: 11.3 minutes (90 Watts)
  • Output Frequency: 60 Hz
  • Series: INTERNET OFFICE
  • Model #: INTERNET350U
  •  
  • ¥16,275 
  • ¥21,110 Shipping
Tripp Lite SMART1300LCDT Series SmartPro LCD 120V 1300VA 720W Line-Interactive UPS, AVR, Tower, LCD, USB, 8 Outlets - Tower - 6.30 Hour Recharge - 110 V AC Input - 120 V AC Output - 4 x NEMA 5-15R
Quick View
Tripp Lite SMART1300LCDT Series SmartPro LCD 120V 1300VA 720W Line-Interactive UPS, AVR, Tower, LCD, USB, 8 Outlets - Tower - 6.30 Hour Recharge - 110 V AC Input - 120 V AC Output - 4 x NEMA 5-15R
  • Outlets: 8
  • Battery Run Time: Half load: 10 minutes (360 watts)
  • Output Frequency: 60 Hz
  • Battery Recharge Time: Less than 6.3 hours from 10% to 90%
  • Model #: SMART1300LCDT
APC BR1500G  Back-UPS Pro, 1500VA/865W, Tower, 120V, 10x NEMA 5-15R outlets, AVR, LCD, User Replaceable Battery - Tower - 8 Hour Recharge - 3 Minute Stand-by - 120 V Input - 120 V AC Output
Quick View
APC BR1500G Back-UPS Pro, 1500VA/865W, Tower, 120V, 10x NEMA 5-15R outlets, AVR, LCD, User Replaceable Battery - Tower - 8 Hour Recharge - 3 Minute Stand-by - 120 V Input - 120 V AC Output
  • Outlets: 10
  • Battery Run Time: Run Time at Full Load: 3.8 minutes Run Time at Half load: 12.8 minutes
  • Output Frequency: 50/60 Hz +/- 3 Hz sync to mains
  • Battery Recharge Time: 8 Hours
  • Model #: BR1500G
Tripp Lite 600VA 300W 120V Standby Desktop UPS 4 Outlet BC600R
Quick View
Tripp Lite 600VA 300W 120V Standby Desktop UPS 4 Outlet BC600R
  • Outlets: 4
  • Battery Run Time: > 120 minutes
  • Output Frequency: not_applicable
  • Battery Recharge Time: <8 Hours
  • Model #: BC600R
CyberPower PR1500RT2UC Smart App Sinewave PR1500RT2UC - UPS (rack-mountable / external) - AC 100-125 V - 1500 Watt - 1500 VA - 9 Ah-Ethernet, RS-232, USB-output connectors: 8 - active PFC-2U-10ft cord
Quick View
CyberPower PR1500RT2UC Smart App Sinewave PR1500RT2UC - UPS (rack-mountable / external) - AC 100-125 V - 1500 Watt - 1500 VA - 9 Ah-Ethernet, RS-232, USB-output connectors: 8 - active PFC-2U-10ft cord
  • Outlets: 8
  • Battery Run Time: Full Load 6.5 min Half Load 18.2 min
  • Output Frequency: 50/60 Hz +/- 1%
  • Battery Recharge Time: 3 Hours (0% to 90% charged)
  • Model #: PR1500RT2UC
CyberPower CP1200AVR AVR UPS Systems - 1200VA/720W, 120 VAC, NEMA 5-15P, Mini-Tower, 10 Outlets, PowerPanel
Quick View
CyberPower CP1200AVR AVR UPS Systems - 1200VA/720W, 120 VAC, NEMA 5-15P, Mini-Tower, 10 Outlets, PowerPanel
  • Outlets: 8
  • Battery Run Time: Runtime at Half Load: 12 min Runtime at Full Load: 3 min
  • Battery Recharge Time: 8 Hour(s)
  • Series: AVR
  • Model #: CP1200AVR
CyberPower OR500LCDRM1U Smart App LCD UPS Systems - 500VA/300W, 120 VAC, NEMA 5-15P, 1U, Rackmount, 6 Outlets, LCD, PowerPanel,  4 x 5-15R Battery/Surge Protected 2 x 5-15R Surge Protected Outlets
Quick View
CyberPower OR500LCDRM1U Smart App LCD UPS Systems - 500VA/300W, 120 VAC, NEMA 5-15P, 1U, Rackmount, 6 Outlets, LCD, PowerPanel, 4 x 5-15R Battery/Surge Protected 2 x 5-15R Surge Protected Outlets
  • Outlets: 4 x 5-15R Battery/Surge Protected 2 x 5-15R Surge Protected
  • Battery Run Time: DVDR/Home Theater (40W) - 60 min. Entry-level PC with 19" LCD (150W) - 12 min. Midrange PC with 19" LCD (300W) - 3 min.
  • Battery Recharge Time: 8 Hours
  • Series: Smart App Intelligent LCD Rackmount GreenPower UPS
  • Model #: OR500LCDRM1U
CyberPower CP685AVRLCD Intelligent LCD UPS Systems - 685VA/390W, 120 VAC, NEMA 5-15P, Compact, 8 Outlets, LCD, PowerPanel Personal
Quick View
CyberPower CP685AVRLCD Intelligent LCD UPS Systems - 685VA/390W, 120 VAC, NEMA 5-15P, Compact, 8 Outlets, LCD, PowerPanel Personal
  • Outlets: 8
  • Battery Run Time: 10 min at Half Load 2 min at Full Load
  • Input Voltage Range: 90 - 140V
  • Input Frequency: 60 Hz +/- 3 Hz
  • Model #: CP685AVRLCD
CyberPower EC550G Ecologic UPS Systems - 550VA/330W, 120 VAC, NEMA 5-15P, Compact, 8 Outlets, PowerPanel
Quick View
CyberPower EC550G Ecologic UPS Systems - 550VA/330W, 120 VAC, NEMA 5-15P, Compact, 8 Outlets, PowerPanel
  • Outlets: 8
  • Battery Run Time: 2.4 minutes (300W) 7.35 minutes (150W)
  • Battery Recharge Time: 8 Hour(s)
  • Series: Ecologic
  • Model #: EC550G
CyberPower OR700LCDRM1U Smart App LCD UPS Systems - 700VA/400W, 120 VAC, NEMA 5-15P, 1U, Rackmount, 6 Outlets, LCD, PowerPanel
Quick View
CyberPower OR700LCDRM1U Smart App LCD UPS Systems - 700VA/400W, 120 VAC, NEMA 5-15P, 1U, Rackmount, 6 Outlets, LCD, PowerPanel
  • Outlets: 6
  • Battery Run Time: At Full Load: 3 min At Half Load: 11 min
  • Output Frequency: 60 Hz +/- 1%
  • Battery Recharge Time: 8 Hours
  • Model #: OR700LCDRM1U
CyberPower EC750G Ecologic UPS Systems - 750VA/450W, 120 VAC, NEMA 5-15P, Compact, 12 Outlets, PowerPanel® Personal
Quick View
CyberPower EC750G Ecologic UPS Systems - 750VA/450W, 120 VAC, NEMA 5-15P, Compact, 12 Outlets, PowerPanel® Personal
  • Outlets: 12
  • Battery Run Time: At half load: 8 minutes At full load: 1 minute
  • Output Frequency: 50 / 60 Hz +/- 1% (auto-sensing)
  • Battery Recharge Time: 8 Hour(s)
  • Model #: EC750G
CyberPower OR1500PFCRT2U 1500 VA 1050 Watts UPS
Quick View
CyberPower OR1500PFCRT2U 1500 VA 1050 Watts UPS
  • Outlets: 8
  • Battery Run Time: Runtime at Half Load: 17 minutes Runtime at Full Load: 7.7 minutes
  • Output Frequency: 60 Hz +/- 1%
  • Battery Recharge Time: 10 Hour(s)
  • Model #: OR1500PFCRT2U
Eaton 5PX1500RTG2 5PX G2 1440VA 1440W 120V Line-Interactive UPS - 8 NEMA 5-15R Outlets, Cybersecure Network Card Option, Extended Run, 2U Rack/Tower - 5PX G2 1440VA Rack/Tower UPS - 5 Minute Stand
Quick View
Eaton 5PX1500RTG2 5PX G2 1440VA 1440W 120V Line-Interactive UPS - 8 NEMA 5-15R Outlets, Cybersecure Network Card Option, Extended Run, 2U Rack/Tower - 5PX G2 1440VA Rack/Tower UPS - 5 Minute Stand
  • Outlets: 8
  • Battery Run Time: Runtime Full Load (min.) 5 min. (1440W) Runtime Half Load (min.) 15 min. (720W)
  • Brand: EATON
  • Input Connection: NEMA 5-15P
  • Model #: 5PX1500RTG2
CyberPower Smart App Sinewave PR3000LCD 3000VA/2700W NEMA L5-30P 10 Outlets Pure Sine Wave Tower LCD UPS
Quick View
CyberPower Smart App Sinewave PR3000LCD 3000VA/2700W NEMA L5-30P 10 Outlets Pure Sine Wave Tower LCD UPS
  • Outlets: 10
  • Battery Run Time: Runtime at Half Load: 17 min Runtime at Full Load : 6 min
  • Output Frequency: 50/60Hz +/- 1% On Battery Frequency
  • Battery Recharge Time: 8 Hours
  • Model #: PR3000LCD
  •  
  • ¥496,710 
  • ¥267,115 Shipping
Tripp Lite 1000 VA 600 Watts ECO-Friendly UPS Battery Backup, AVR Protection, LCD Display, Line-Interactive, 8 Outlets and 2 USB Charging Ports, 120V, Tel Protection (ECO1000LCD)
Quick View
Tripp Lite 1000 VA 600 Watts ECO-Friendly UPS Battery Backup, AVR Protection, LCD Display, Line-Interactive, 8 Outlets and 2 USB Charging Ports, 120V, Tel Protection (ECO1000LCD)
  • Outlets: 8
  • Battery Run Time: At Half Load: 7 Minutes At Full Load: 2 Minutes
  • Output Frequency: 50 / 60 Hz
  • Battery Recharge Time: 7 Hour(s)
  • Model #: ECO1000LCD
APC SMC1500-2UC 1440 VA 900 Watts 6 Outlets Pure Sinewave Smart-UPS with SmartConnect (Replaces SMC1500-2U)
Quick View
APC SMC1500-2UC 1440 VA 900 Watts 6 Outlets Pure Sinewave Smart-UPS with SmartConnect (Replaces SMC1500-2U)
  • Outlets: 6
  • Battery Run Time: At Half load: 18 Minutes At Full load: 6 Minutes
  • Output Frequency: 47 - 63 Hz
  • International Version: 120V
  • Model #: SMC1500-2UC
CYBERPOWER SYSTEMS (USA), INC. SL700U STANDBY, 8 X NEMA 5-15R, NEMA 5-15P W/5 FT CORD, USB CHARGE PORTS, 3YR WTY
Quick View
CYBERPOWER SYSTEMS (USA), INC. SL700U STANDBY, 8 X NEMA 5-15R, NEMA 5-15P W/5 FT CORD, USB CHARGE PORTS, 3YR WTY
  • Outlets: 8
  • Battery Run Time: Runtime at Full Load: 2 minutes Runtime at Half Load: 9 minutes
  • Battery Recharge Time: 8 Hours
  • Series: Standby Series
  • Model #: SL700U
CyberPower Smart App Sinewave PR1000LCD 1000VA Pure Sine Wave Mini-Tower LCD UPS
Quick View
CyberPower Smart App Sinewave PR1000LCD 1000VA Pure Sine Wave Mini-Tower LCD UPS
  • Outlets: 8
  • Battery Run Time: Runtime at Half Load (min): 24.5 Runtime at Full Load (min): 7
  • Battery Recharge Time: 3 Hours - Quick Charge Mode, 8 Hours - Eco Mode
  • Series: Smart App Sinewave
  • Model #: PR1000LCD
CyberPower OR1500LCDRM1U Smart App LCD UPS Systems - 1500VA/900W, 120 VAC, NEMA 5-15P, 1U, Rackmount, 6 Outlets, LCD, PowerPanel
Quick View
CyberPower OR1500LCDRM1U Smart App LCD UPS Systems - 1500VA/900W, 120 VAC, NEMA 5-15P, 1U, Rackmount, 6 Outlets, LCD, PowerPanel
  • Outlets: 4 x 5-15R Battery & Surge 2 x 5-15R Surge-Only
  • Battery Run Time: Runtime at Half Load: 11 minutes Runtime at Full Load: 2 minutes
  • Output Frequency: 60 Hz +/- 1%
  • Battery Recharge Time: 8 Hour(s)
  • Model #: OR1500LCDRM1U
CyberPower PR1500LCDN Smart App Sinewave UPS Systems - 1500VA/1500W, 120 VAC, NEMA 5-15P, Mini-Tower, Sine Wave, 8 Outlets, LCD, PowerPanel® Business
Quick View
CyberPower PR1500LCDN Smart App Sinewave UPS Systems - 1500VA/1500W, 120 VAC, NEMA 5-15P, Mini-Tower, Sine Wave, 8 Outlets, LCD, PowerPanel® Business
  • Outlets: 8
  • Battery Run Time: Runtime at Half Load: 24 Minutes Runtime at Full Load: 8 Minutes
  • Output Frequency: 50/60 Hz +/- 1%
  • Battery Recharge Time: 3 hours - Quick Charge Mode 8 hours - Eco Mode
  • Model #: PR1500LCDN
APC SMT750RM2UC 750 VA 500 Watts 120V 6 Outlets Pure Sinewave Smart-UPS with SmartConnect (Replaces SMT750RM2U)
Quick View
APC SMT750RM2UC 750 VA 500 Watts 120V 6 Outlets Pure Sinewave Smart-UPS with SmartConnect (Replaces SMT750RM2U)
  • Outlets: 6
  • Battery Run Time: At Full Load: 5.5 Minutes At Half Load: 16 Minutes
  • Output Frequency: 50/60 Hz +/- 3 Hz
  • Battery Recharge Time: 3 Hour(s)
  • Model #: SMT750RM2UC

An uninterruptible power supply, or UPS system, ensures that electricity continuously reaches crucial equipment, powering it at all times. Even if other devices lose power during outages or brownouts, servers and computers continue to run. Users then have time to safely shut down their machinery to prevent the loss of data. A UPS system also is essential for keeping important systems such as security cameras and health care equipment running for as long as possible.

A UPS System Protects Against Surges

The outlets on a UPS system provide similar defenses to those offered by surge protectors, absorbing the excess energy of surges and spikes. Receiving a jolt of too much power may damage sensitive computer components such as hard drives. A desktop UPS or a larger model likely has multiple devices plugged in and keeps them safe from such events that are especially prevalent after outages, just as power is restored. The initial spike may be detrimental to devices plugged into a standard outlet, so a surge-protected outlet is helpful. Some UPS models feature surge-only outlets, which supply power and protection without draining the UPS battery.

Saving Energy with a UPS System

Many UPS system types have a "green" or "eco" mode that increases energy efficiency and reduces utility costs. Energy-focused systems offer extra savings measures such as switching off during non-business hours or detecting and bypassing unused equipment. A UPS system usually also has a single switch or circuit breaker similar to the kind many power strips have. Operators can power down multiple devices with just the press of a button, making reboots and power-cycles quicker, easier and safer.

Protection for Multiple Types of Equipment

A single-user UPS system is small enough to fit beneath a desk while still supplying protection for a computer, monitor and printer. Specialized UPS models meet the unique needs of environments such as hospitals and marine vessels. When installing in a server room alongside equipment such as servers and a power distribution unit, consider a rack-mountable UPS to economize on space. A UPS typically has not only electrical outlets but also network, USB and serial ports for protecting against noise as well as surges. Some devices use transformer block plugs, requiring outlets spaced farther apart.

Suitable for Small and Large Businesses

Businesses of all sizes use servers and switches, for which a pure sinewave UPS is an optimal solution. These closely simulate the type of power you expect from standard utilities for consistent, reliable performance. There are also single-phase UPS systems for smaller set-ups and three-phase units for powering multiple devices with varying power requirements. Line-interactive units manage voltage changes without utilizing battery power unless necessary, so it has a strong charge and is ready to handle an outage. An online UPS system, on the other hand, converts incoming power using the battery to maintain consistency. This creates a layer of insulation between the equipment and external line issues.