APC · Uninterruptible Power Supplies (UPSs)

APC Easy UPS 3S price in United Kingdom

MPN E3SUPS40KHBMPN E3SUPS40KHB1EAN 8592978409234EAN 731304428299

Noise63 dB
TypeTower
Weight590 kg
ColourWhite

Lowest price incl. delivery

£7,383.99

at Back to the OfficeFree deliveryIn stock

1 store
Range £7,383.99 – £10,102.99
Save up to £2,719.00 vs. the dearest store
1 in stock
1 with free delivery
Checked 6 Oct 2026, 05:40 UTC

Go to Back to the Office See all 2 offers

Ad · prices and stock as last reported by the store; the store's checkout is what counts.

Full specifications and side-by-side comparison

Prices in United Kingdom

1 store · prices in GBP · updated 6 Oct 2026, 05:40 UTC

Lowest price£7,383.99at Back to the Office · free shippingGo to Back to the Office

Price range across 2 offers

Save up to £2,719.00 (27%) by choosing the cheapest store

1 of 1 stores in stock
1 with free shipping
Checked 6 Oct 2026, 05:40 UTC

Back to the OfficeLowest priceAPC Easy UPS 3S uninterruptible power supply (UPS) Double-conversion (Online) 40 kVA 40000 W In stockFree shipping
£7,383.99incl. free shipping
Go to store : Back to the Office (opens in a new tab)
Back to the OfficeAPC Easy UPS 3S uninterruptible power supply (UPS) Double-conversion (Online) 40 kVA 40000 W In stockFree shipping
£10,102.99incl. free shipping+£2,719.00 (37%) vs lowest
Go to store : Back to the Office (opens in a new tab)

Ad: we may earn a commission when you buy through these links; it never changes the order, which is by total price only. Prices and stock are shown as each store states them, as of 6 Oct 2026, 05:40 UTC, and can change at any time. Taxes are included only where the store includes them.

Price history in United Kingdom

Price history is being collected. After 14 days of prices we will show whether today's price is good.

Best price · Back to the Office£7,383.99

Go to store

Product details

Identification

Brand: APC
Product: Easy UPS 3S
Full name: APC Easy UPS 3S uninterruptible power supply (UPS) Double-conversion (Online) 40 kVA 40000 W
Manufacturer part number: E3SUPS40KHB, E3SUPS40KHB1
EAN / UPC: 8592978409234, 731304428299, 3606489697952, 731304340829
Category: Uninterruptible Power Supplies (UPSs)

49 specifications from the manufacturer's data sheet

Features

UPS topology	Double-conversion (Online)
Output power capacity	40 kVA
Output power	40000 W
Waveform	Pure sine
Input operation voltage (min)	304 V
Input operation voltage (max)	477 V
Input frequency	50/60 Hz
Output operation voltage (min)	380 V
Output operation voltage (max)	400 V
Output frequency regulation	45 - 65 Hz
Maximum current	73 A
Number of input phases	3
Number of output phases	3
Efficiency	96%
Emergency Power Off (EPO)	Yes
Output voltage Total Harmonic Distortion (THD)	3%
Noise level	63 dB

Ports & interfaces

AC outlet types	Hardwire, Terminal
USB port	Yes
Serial interface	Yes
Serial interface type	RS-232
SmartSlot	Yes
SmartConnect port	No

Battery

Battery technology	Sealed Lead Acid (VRLA)
Battery voltage	240 V
Typical backup time at full load	10 min

Design

Form factor	Tower
Product colour	White
Display type	LCD
International Protection (IP) code	IP20

Operational conditions

Operating temperature (T-T)	0 - 40 °C
Storage temperature (T-T)	-15 - 40 °C
Operating relative humidity (H-H)	0 - 95%
Storage relative humidity (H-H)	0 - 95%
Operating altitude	0 - 9999 m
Non-operating altitude	0 - 15000 m