APC Easy 3S uninterruptible power supply (UPS) Double-conversion (Online) 20 kVA 20000 W
Brand APC
From
£5,427.24
Free delivery
You save £261.75 (5%)
3 offers at 3 retailers
Listed since 7 April 2026
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Description
Specifications
| UPS topology | Double-conversion (Online) |
| Output power capacity | 20 kVA |
| Output power | 20000 W |
| Waveform | Pure sine |
| Input operation voltage (min) | 304 V |
| Input operation voltage (max) | 477 V |
| Input frequency | 45/65 Hz |
| Output operation voltage (min) | 380 V |
| Output operation voltage (max) | 415 V |
| Output frequency | 50/60 Hz |
| Maximum current | 37 A |
| Number of input phases | 3 |
| Number of output phases | 3 |
| Input power factor | 0.99 |
| Output voltage Total Harmonic Distortion (THD) | 3% |
| Input current Total Harmonic Distortion (THD) | 3% |
| SmartSlot | Yes |
| SmartConnect port | No |
| Battery technology | Sealed Lead Acid (VRLA) |
| Battery voltage | 220 V |
| Number of batteries supported | 3 |
| Form factor | Tower |
| Product colour | White |
| Display type | LED |
| International Protection (IP) code | IP20 |
| 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 - 999.9 m |
| Non-operating altitude | 0 - 15000 m |
| Compliance certificates | RoHS |
| Certification | CE, EAC, IEC 62040-1-1, IEC 62040-2, IEC 62040-3, IEC 62040-4, ISTA 2B, RCM, WEEE, REACH |
| Management card included | No |
| Quick installation guide | Yes |
| Width | 380 mm |
| Depth | 928 mm |
| Height | 1400 mm |
| Weight | 122 kg |
| Package width | 563 mm |
| Package depth | 1014 mm |
| Package height | 1640 mm |
| Package weight | 158 kg |
| Harmonized System (HS) code | 85078000 |
| Output voltage | 400 V |
Full specifications
| Marque | APC |
| Référence fabricant | e3sups20khb |
| EAN | 0731304340782 |
APC Easy 3S uninterruptible power supply (UPS) Double-conversion (Online) 20 kVA 20000 W: complete technical analysis for 2026
The APC Easy 3S uninterruptible power supply (UPS) Double-conversion (Online) 20 kVA 20000 W is a well-regarded reference in the Informatique category. In 2026, it remains one of the most relevant choices for those seeking to balance quality and budget. The brand APC has a strong reputation among consumers, reflected in its consistent availability across many partner retailers. Thanks to our comparison tool, you can see all available offers at a glance and go directly to the retailer of your choice to complete your purchase with confidence.
Who is this Informatique for?
The APC Easy 3S uninterruptible power supply (UPS) Double-conversion (Online) 20 kVA 20000 W benefits from the expertise of APC in this category. Its design meets current market standards and satisfies even the most demanding users in their everyday activities. The brand's reliability translates into positive feedback from regular buyers, who particularly appreciate the consistency between the promises of the product sheet and the real-world experience. For the Informatique category, this is an option we recommend without hesitation.
For intensive or occasional use
The APC Easy 3S uninterruptible power supply (UPS) Double-conversion (Online) 20 kVA 20000 W adapts to different levels of use in the Informatique category. Whether you use it intensively every day or more occasionally, this APC product offers appreciated versatility. Regular users value its reliability over time, while occasional users appreciate how easy it is to pick up without any special training. For even more demanding use, also check the APC Smart-UPS, Line Interactive, 2200VA, Rackmount 2U, 230V, 8x IEC C13+2x IEC C19 outlets, Network Card, AVR, LCD.
Against the competition
In the Informatique market, the APC Easy 3S uninterruptible power supply (UPS) Double-conversion (Online) 20 kVA 20000 W is well positioned thanks to its price from £5,427.24 and the strength of APC. Our comparison tool lets you verify in real time whether this positioning still holds against other available offers.
Market price ranges in 2026
| Range | Indicative price |
|---|---|
| Entry-level | Under 384300 £ |
| Mid-range | 384300 £ to 896710 £ |
| High-end | Over 896710 £ |
The best times to buy the APC Easy 3S uninterruptible power supply (UPS) Double-conversion (Online) 20 kVA 20000 W at a lower price are Black Friday in November, the January sales and the summer sales in July. Our price history lets you judge whether the current price is a genuine bargain or whether it is worth waiting a few weeks. Outside these periods, flash promotions remain frequent among Compiral's partner retailers.
Frequently asked questions about APC Easy 3S uninterruptible power supply (UPS) Double-conversion (Online) 20 kVA 20000 W
How does the APC Easy 3S uninterruptible power supply (UPS) Double-conversion (Online) 20 kVA 20000 W compare to competitors in the Informatique category?
In the Informatique category, the APC Easy 3S uninterruptible power supply (UPS) Double-conversion (Online) 20 kVA 20000 W occupies a specific market segment. Compared to other available models, it stands out mainly through the balance between its features and its price. To compare objectively, consult the detailed spec sheet on this page and compare specifications with other similar products listed on our comparison tool.
Is the APC Easy 3S uninterruptible power supply (UPS) Double-conversion (Online) 20 kVA 20000 W suitable for beginners?
Yes, the APC Easy 3S uninterruptible power supply (UPS) Double-conversion (Online) 20 kVA 20000 W is generally appreciated by both beginners and regular users of the Informatique category. It is quick to set up and APC usually provides clear documentation. If you are new to this product category, consult the spec sheet on this page to identify the key criteria to check before making your choice.
Is there a refurbished version of the APC Easy 3S uninterruptible power supply (UPS) Double-conversion (Online) 20 kVA 20000 W?
Refurbished versions of the APC Easy 3S uninterruptible power supply (UPS) Double-conversion (Online) 20 kVA 20000 W may be available from certain Compiral partner retailers. These refurbished products allow you to save between 20% and 40% compared to the new price while still benefiting from a warranty. Check availability in our offers table and review the warranty conditions offered by the retailer.
When do prices for the APC Easy 3S uninterruptible power supply (UPS) Double-conversion (Online) 20 kVA 20000 W drop during the year?
Prices for the APC Easy 3S uninterruptible power supply (UPS) Double-conversion (Online) 20 kVA 20000 W typically drop during Black Friday (November), the January sales and the summer sales (July). Promotional deals are also common around Cyber Monday and the holiday season. Our price history lets you spot trends and assess whether a price drop is likely soon in the Informatique category.
Is delivery free for the APC Easy 3S uninterruptible power supply (UPS) Double-conversion (Online) 20 kVA 20000 W at all retailers?
Free delivery is not guaranteed for the APC Easy 3S uninterruptible power supply (UPS) Double-conversion (Online) 20 kVA 20000 W at every retailer. Some include it in their price, others charge separately. On Compiral, use the free delivery filter to display only offers with free postage. The total price shown in our table always includes delivery costs for a true cost comparison.
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