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Product comparison · 2 uninterruptible power supplies (upss)

CyberPower OL8KRTF uninterruptible power supply (UPS) Double-conversion (Online) 8 kVA vs CyberPower ST900U uninterruptible power supply (UPS) Standby (Offline) 0.9 kVA

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  • 39specifications compared
  • 27differ
  • 12identical
  • 34known for one product only

Key differences

  • UPS topology
    • Double-conversion (Online)
    • Standby (Offline)
  • Output power capacity
    • 8 kVA
    • 0.9 kVA
  • Output power
    • 8000 W
    • 500 W
  • Waveform
    • Sine
    • Pseudo sine
  • Input operation voltage (min)
    • 120 V
    • 96 V
  • Input operation voltage (max)
    • 280 V
    • 140 V
  • Input frequency
    • 40 - 70 Hz
    • 47/63 Hz
  • Output operation voltage (max)
    • 240 V
    • 120 V

Side by side

Differences highlightedShow differences only
73 specifications
A

CyberPower

OL8KRTF uninterruptible power supply (UPS) Double-conversion (Online) 8 kVA

Model OL8KRTF

View product
B

CyberPower

ST900U uninterruptible power supply (UPS) Standby (Offline) 0.9 kVA

Model ST900U

View product
Features10 differ
UPS topologyDiffersDouble-conversion (Online)Standby (Offline)
Output power capacityDiffers8 kVA0.9 kVA
Output powerDiffers8000 W500 W
WaveformDiffersSinePseudo sine
Input operation voltage (min)Differs120 V96 V
Input operation voltage (max)Differs280 V140 V
Input frequencyDiffers40 - 70 Hz47/63 Hz
Output operation voltage (max)Differs240 V120 V
Surge energy ratingKnown for one2430 J
Transfer time (Line Mode to Battery Mode)Differs0 ms8 ms
Efficiency (ECO mode)Known for one97%
Input power factorKnown for one0.99
Output power factorKnown for one1
Crest factorKnown for one3:1
ECO modeKnown for oneYes
Emergency Power Off (EPO)Known for oneYes
Overload capacity (1 minute)Known for one125%
Overload capacity (10 seconds)Known for one150%
EMI/RFI noise filteringKnown for oneYes
Noise levelKnown for one65 dB
Surge protection featuresKnown for oneNetwork, Telephone
Power protection featuresDiffersOverload, Short circuitOverload
Surge protectionKnown for oneYes
Socket circuit breakerKnown for oneYes
Ports & interfaces3 differ
AC outlet typesDiffersNEMA 5–20R, NEMA L6-30R, TerminalNEMA 5-15R
AC outlets quantityDiffers10 AC outlet(s)12 AC outlet(s)
USB port typeDiffersUSB Type-BUSB Type-A
Serial interfaceKnown for oneYes
Serial interface typeKnown for oneRS-232
RS-232 portsKnown for one1
Modem (RJ-11) portsKnown for one2
Ethernet LAN (RJ-45) portsKnown for one2
Emergency Power Off (EPO) connectorKnown for oneYes
Power plugKnown for oneNEMA 5-15P
USB 2.0 ports quantityKnown for one2
Battery4 differ
Battery capacityDiffers9 Ah7.2 Ah
Number of batteries supportedDiffers201
Typical backup time at full loadDiffers3.6 min2 min
Typical backup time at half loadDiffers10 min7.5 min
Battery recharge time(90%)Known for one5 h
Hot-swap batteryKnown for oneYes
Cold startKnown for oneYes
Battery recharge timeKnown for one8 h
Design2 differ
Form factorDiffersRackmount/TowerCompact
Housing materialKnown for oneSteel
Rack capacityKnown for one8U
Display typeKnown for oneLCD
LED indicatorsDiffersYesPower
Cable lengthKnown for one1.5 m
Operational conditions2 differ
Storage temperature (T-T)Differs-20 - 45 °C-15 - 45 °C
Operating relative humidity (H-H)Differs0 - 90%0 - 95%
Storage relative humidity (H-H)Known for one0 - 95%
Packaging content1 differ
Rack mount kitKnown for oneYes
Cables includedDiffersPhone (RJ-11), Serial, USB cableUSB cable
ManualKnown for oneYes
Safety regulation & standards1 differ
SafetyDiffersUL 1778 5th Ed., CSA C22.2 NO.107.3-05, FCC 5 AUL1778, cUL, FCC DOC B, CEC
Weight & dimensions4 differ
WidthDiffers433 mm309 mm
DepthDiffers660 mm177 mm
HeightDiffers352 mm78 mm
WeightDiffers157.4 kg3.49 kg
Sustainabilityidentical
Sustainability certificatesKnown for oneENERGY STAR

A dash means the value is not stated by the source. Unknown values are never counted for or against a product, and there is no overall score.

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