SKU: BK500EI Category:

APC Back-UPS uninterruptible power supply (UPS) Standby (Offline) 500 VA 300 W 4 AC outlet(s)

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£138.14 £115.12 Ex. VAT

Availability: 35 in stock

Finance/leasing available for orders over £1000 Inc VAT

Free mainland UK shipping on orders over £150 Ex VAT

The re-invention of the most relied upon desktop UPS in history: the Back-UPS!
The Back-UPS CS provides professional-grade power protection for office and home office systems. Battery powered & surge protected power outlets, built-in phone/fax/modem line (DSL compatible) protection, safe system shutdown software with sophisticated power management features and pro-active audio-visual status indicators ensure office systems and their valuable data are protected from dangerous power surges, spikes and blackouts. Serial or USB connectivity gives users more flexibility making installation quicker and easier. Easy access to a hot-swappable, user-replaceable battery also makes servicing the Back-UPS CS hassle-free. These features along with its classic styling make the Back-UPS CS a perfect choice for protecting your important office and home office systems.

Key features:
– Audible alarms
– Automatic restart of loads after UPS shutdown
– Automatic self-test
– Battery replacement without tools
– Battery-protected and surge-only outlets
– Dataline Surge Protection
– Hot-swappable batteries
– LED status indicators
– Power conditioning
– Resettable circuit breakers
– Safety-agency approved
– Transformer-block spaced outlets
– User-replaceable batteries

Feature Feature Value
UPS topology Standby (Offline)
Output power capacity 500 VA
Output power 300 W
Waveform Sine
Input operation voltage (min) 160 V
Input operation voltage (max) 300 V
Input frequency 50/60 Hz
Output frequency regulation 47 – 63 Hz
Maximum current 7 A
Surge energy rating 310 J
Hold time (min) 6 ms
Hold time (max) 10 ms
Efficiency 99%
Noise level 40 dB
Surge protection Y
Surge protection features Digital Subscriber Line (DSL),Fax,Modem,Telephone
Power protection features Overload
Audible alarm(s) Y
Audible alarm modes Low battery alarm,Overload alarm
AC outlet types C13 coupler
Power plug C14 coupler
AC outlets quantity 4 AC outlet(s)
Number of output IEC jumpers 2
USB port Y
Battery technology Sealed Lead Acid (VRLA)
Battery capacity 7 Ah
Battery capacity 83 VAh
Battery voltage 12 V
Typical backup time at full load 3.8 min
Typical backup time at half load 13.8 min
Battery life (max) 6 year(s)
Battery recharge time 8 h
Automatic battery test Y
Form factor Tower
Product colour Beige
Cable length 1.83 m
LED indicators Battery replacement
Energy Star certified Y
RoHS compliance Y
Certification C-tick, CE, EN 50091-1, EN 50091-2, GOST, VDE, REACH
Operating temperature (T-T) 0 – 40 °C
Storage temperature (T-T) -15 – 45 °C
Operating relative humidity (H-H) 0 – 95%
Storage relative humidity (H-H) 0 – 95%
Operating altitude 0 – 3000 m
Non-operating altitude 0 – 15000 m
Width 91 mm
Depth 284 mm
Height 165 mm
Weight 6.32 kg
Cables included Phone (RJ-11),USB cable
Quick installation guide Y
Warranty card Y
Software CD Y
Bundled software PowerChute Personal Edition
Package width 241 mm
Package depth 368 mm
Package height 178 mm
Package weight 7.05 kg
Quantity per pallet 48 pc(s)
Quantity per master (outer) case 1 pc(s)
Nominal output voltage 230 V
Nominal input voltage 230 V
Filtering Y
Packaging content Detachable 1.2m IEC power cordnDetachable 1.8 m IEC power cord
UPS topology

Standby (Offline)

Maximum current

7 A



Surge protection



91 mm

Warranty card


Noise level

40 dB

USB port


Form factor


Cable length

1.83 m

Energy Star certified



6.32 kg



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