APC Back-UPS uninterruptible power supply (UPS) Line-Interactive 0.5 kVA 300 W 3 AC outlet(s)

Manufacturer: APC | Model: BX500MI | Product ID: 1084 | Warranty: 2 Years
£77.30 (inc. VAT)
11 in stock
100% Money Back Guarantee - Risk Free

Product Technical Specification

Features
UPS topologyLine-Interactive
Output power capacity0.5
Output power300
WaveformSine
Input operation voltage (min)140
Input operation voltage (max)300
Input frequency50/60
Output frequency50/60
Automatic Voltage Regulation (AVR)Yes
Surge energy rating273
Efficiency96.1
Input power factor0.63
Noise level40
Surge protectionYes
Audible alarm(s)Yes
Audible alarm modesAlarm when on battery,Low battery alarm
Ports & interfaces
AC outlet typesC13 coupler
Power plugC14 coupler
AC outlets quantity3
Number of output IEC jumpers1
Ethernet LAN (RJ-45) ports2
Cabling technology10/100/1000Base-T(X)
Battery
Battery technologySealed Lead Acid (VRLA)
Battery voltage12
Battery life (max)5
Battery recharge time8
Automatic battery testYes
Design
Form factorTower
Cable length1.5
Product colourBlack
LED indicatorsBattery replacement
International Protection (IP) codeIP20
CertificationCE, EAC, EN/IEC 62040-1
Operational conditions
Operating temperature (T-T)0 - 40
Storage temperature (T-T)-15 - 40
Operating relative humidity (H-H)0 - 95
Storage relative humidity (H-H)0 - 95
Operating altitude0 - 3000
Non-operating altitude0 - 3000
Technical details
Sustainability certificatesRoHS
Weight & dimensions
Width98
Depth310
Height138
Weight4200
Package width142
Package depth346
Package height222
Package weight4500
Logistics data
Harmonized System (HS) code85078000

Delivery Options

Economy Delivery
FREE
Economy Delivery

Economy Delivery (UK)

Estimated delivery date: Wed 26th Aug 2026 to Sat 29th Aug 2026
Business Express
£6.95
Business Express

Business Express

Estimated delivery date: Tue 25th Aug 2026 to Thu 27th Aug 2026
View all Delivery Options & International Rates
Automatic self-test
Periodic battery self-test ensures early detection of a battery that needs to be replaced.

Intelligent battery management
Maximizes battery performance, life, and reliability through intelligent, precision charging.

Battery failure notification
Provides early-warning fault analysis on batteries enabling timely preventive maintenance

Safety-agency approved
Ensures the product has been tested and approved to work safely with the connected service provider equipment and within the specified environment.

Surge only outlets
Protect secondary electronics from surges and spikes without reducing battery power used to run primary electronics during an outage.

Battery and surge protected outlets
Back up and protect your hardware and data during power outages, surges and spikes .

Battery-protected and surge-only outlets
Reserves power capacity and run time for connected equipment that require UPS battery back-up while providing surge only protection for less critical equipment

Audible alarms
Provides notification of changing utility power and UPS power conditions

LED status display
Quickly understand unit and power status with visual indicators.
Features
UPS topologyLine-Interactive
Output power capacity0.5
Output power300
WaveformSine
Input operation voltage (min)140
Input operation voltage (max)300
Input frequency50/60
Output frequency50/60
Automatic Voltage Regulation (AVR)Yes
Surge energy rating273
Efficiency96.1
Input power factor0.63
Noise level40
Surge protectionYes
Audible alarm(s)Yes
Audible alarm modesAlarm when on battery,Low battery alarm
Ports & interfaces
AC outlet typesC13 coupler
Power plugC14 coupler
AC outlets quantity3
Number of output IEC jumpers1
Ethernet LAN (RJ-45) ports2
Cabling technology10/100/1000Base-T(X)
Battery
Battery technologySealed Lead Acid (VRLA)
Battery voltage12
Battery life (max)5
Battery recharge time8
Automatic battery testYes
Design
Form factorTower
Cable length1.5
Product colourBlack
LED indicatorsBattery replacement
International Protection (IP) codeIP20
CertificationCE, EAC, EN/IEC 62040-1
Operational conditions
Operating temperature (T-T)0 - 40
Storage temperature (T-T)-15 - 40
Operating relative humidity (H-H)0 - 95
Storage relative humidity (H-H)0 - 95
Operating altitude0 - 3000
Non-operating altitude0 - 3000
Technical details
Sustainability certificatesRoHS
Weight & dimensions
Width98
Depth310
Height138
Weight4200
Package width142
Package depth346
Package height222
Package weight4500
Logistics data
Harmonized System (HS) code85078000

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We will despatch your order the very same day if we receive cleared payment by 12:00 pm Mon-Fri.

These delivery estimates apply when you order up to 12:00 pm Mon-Fri (excluding public holidays).

We charge a one off delivery cost as outlined below regardless of how many items you order or the weight of your order.

Estimated delivery times are provided to us by the respective delivery companies. We pass this information onto you, the customer.

Despatch times do not apply to UK public holidays.

Estimated delivery times are taken from the next available working day available for delivery. For example if an order was despatched on a working Wednesday by 3pm, the first available working day for delivery would be Thursday provided you placed your order by 3pm on the Wednesday. If the next available weekday is a UK bank holiday/public holiday then your order will be despatched on the next available working day.

Our warehouse reserves the right to upgrade the delivery method you select on your order.

Our available delivery options*

Contact us for a shipping quote.

*All delivery times are estimated unless stated.

Product Returns Note

Buykingston offers a simple, hassle-free returns policy. If for whatever reason you are not happy with the item purchased, you can return it to us within 14 days of receipt for a refund. This applies to items purchased direct through Buykingston only.

Our 14 Day Returns Money Back Guarantee:
For items returned in resaleable condition, with all original packaging. If an item has been opened for inspection but shows signs of use beyond that, a deduction may apply to reflect the reduced value — see our full Terms & Conditions (Section 12) for details.

Some items are excluded from our money-back guarantee unless they have developed a fault. These include:

- Headphones
- Earphones
- Custom made and designed products, such as flash memory products with custom logos on them, e.g. USB flash drives and memory cards with your own logo

Returns FAQs

What is your returns criteria?
14 days from date of receipt, or expected date of receipt on non-tracked items.

How do I go about returning my order?
Please contact us via our contact page with your order number. We will provide you with an RMA number and return instructions, including your return deadline and whether a freepost label applies to your order.

Do I need to contact you before returning my order?
Yes, to obtain an RMA number before sending anything back.

Does my item have to include its original packaging?
Yes, to qualify for our 14 day money-back guarantee. For faulty items, we understand you may no longer have the original packaging.

Who pays for return postage?
If your item is faulty, damaged, or not as described, we cover reasonable return postage, or provide a freepost label where available. If you are returning an item for another reason (including simply changing your mind), you are responsible for return postage unless we have expressly confirmed a freepost label in your RMA email — we recommend using a tracked and insured service for items of significant value.

Who deals with the warranty on a faulty item?
We will. In some circumstances we may ask you to contact the manufacturer directly for assistance.

Please ensure you have read and comply in full with Sections 11–13 of our Terms & Conditions.