CyberPower LCD HSTP3T40KE 40000 VA UPS

40000 VA · 36000 W W · Double-conversion (Online)

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Capacity 40000 VA
Wattage 36000 W
Topology Double-conversion (Online)
Output waveform Pure sine

CyberPower LCD HSTP3T40KE 40000 VA UPS is a double-conversion (online) UPS rated 40000 VA (36000 W). Add up what you plug in (PC, monitor, router) and keep it under about 70% of the watt rating, so it doesn't run flat in seconds during a power cut. It came out in 2025.

Released: 2025-11-17

Specifications

Key specs

Capacity: 40000 VA
Wattage: 36000 W
Topology: Double-conversion (Online)
Output waveform: Pure sine
Released: 2025-11-17
Part number: HSTP3T40KE

Features

UPS topology: Double-conversion (Online)
Output power capacity: 40 kVA
Output power: 36000 W
Waveform: Pure sine
Input operation voltage (min): 132 V
Input operation voltage (max): 478 V
Input frequency: 40/70 Hz
Output operation voltage (min): 220 V
Output operation voltage (max): 415 V
Output frequency: 50/60 Hz
Output voltage regulation: 1%
Maximum current: 42 A
Transfer time (Line Mode to Battery Mode): 0 ms
Number of input phases: 3
Number of output phases: 3
Efficiency: 96%
Efficiency (ECO mode): 98%
Efficiency (Battery mode): 96%
Input power factor: 0.99
Output power factor: 0.9
Power Factor Correction (PFC) type: Active
Crest factor: 3:1
ECO mode: Yes
Emergency Power Off (EPO): Yes
Output voltage Total Harmonic Distortion (THD): 5.5%
Total Harmonic Distortion (THD) (linear load): 1%
Total Harmonic Distortion (THD) (non-linear load): 5.5%
EMI/RFI noise filtering: Yes
Noise level: 58 dB
Surge protection: Yes
Power protection features: Overload
Audible alarm(s): Yes
Audible alarm modes: Alarm when on battery, Battery replacement, Fault, Low battery alarm, Overload alarm
Socket circuit breaker: Yes

Ports & interfaces

Serial interface: Yes
Serial interface type: RS-232, RS-485
Emergency Power Off (EPO) connector: Yes

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Battery

Battery technology: Sealed Lead Acid (VRLA)
Battery voltage: 12 V
Number of batteries supported: 40
Rechargeable battery: Yes

Design

Form factor: Tower
Housing material: Metal
Product colour: Black
Control type: Buttons
Display type: LCD
LED indicators: Yes
International Protection (IP) code: IP20

Operational conditions

Operating temperature (T-T): 0 - 40 °C
Storage temperature (T-T): -40 - 70 °C
Operating relative humidity (H-H): 0 - 95%
Storage relative humidity (H-H): 0 - 95%
Operating altitude: 0 - 1000 m

Weight & dimensions

Width: 250 mm
Depth: 770 mm
Height: 836 mm
Weight: 61 kg

Other features

Overload protection: Yes
Bypass: Automatic Manual

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About this product

CyberPower HSTP3T40KE 3-Phase online UPS provides long-lasting power backup for data closets, transportation and infrastructure, and emergency systems. With parallel expansion capability, the HSTP3T (3-Phase) Series UPS is ideal for critical applications in server rooms, data centers, industrial factories, and power generation plants that require high capacity, high reliability, and extended runtimes. With integrated IGBT technology and intelligent DSP-based control, the UPS produces less input total harmonic distortion (THDi) and achieves higher power efficiency up to 98% in Economy Mode, making it the most efficient UPS in the industry. Higher operating efficiency equates to lowered BTU heat dissipation and lowered idle power consumption, resulting in an operating expense reduction and a lower carbon footprint. To improve operating efficiency, the UPS system works in bypass mode under normal conditions, during which the inverter is kept on standby. During power failures, the UPS switches to battery mode and supplies backup power to the connected critical load.

User manual (PDF) · Datasheet (PDF)

HSTP3T40KE vs similar UPS

	CyberPower LCD HSTP3T40KE 40000 VA UPS	CyberPower LCD OL3T040KERTHDS 40000 VA UPS	APC E3SUPS40KFB 40000 VA UPS	APC Easy 3S
Capacity	40000 VA	40000 VA	40000 VA	40000 VA
Wattage	36000 W	40000 W	40000 W	40000 W
Topology	Double-conversion (Online)	Double-conversion (Online)	Double-conversion (Online)	Double-conversion (Online)
Output waveform	Pure sine	Pure sine	Pure sine	Pure sine
Released	2025	2025	2026	2026