APC vs Eaton vs Vertiv: What Actually Matters When Buying a UPS?

The brand matters less than the model. APC, Eaton and Vertiv all sell the same three UPS designs — standby, line-interactive and online double-conversion — at similar VA sizes. Buy the right design for the load and check six things on the datasheet: the real watt rating (not just VA), the output waveform, battery type (lead-acid or lithium-ion), monitoring and shutdown options, warranty terms, and who services it in Singapore. Two 1500VA units from the same brand can differ more than two 1500VA units from different brands. Use the brand name to start your shortlist, not to finish it.

How do APC, Eaton and Vertiv line up?

Source: Schneider Electric Singapore FAQs (FAQ000277525, FAQ000265093, FA158934); Eaton warranty terms (Malaysia) and ABM page; Eaton's R. Sember in EC&M (2010); Vertiv 3-year limited warranty document (Asia); range names from SourceIT listings; checked 8 Nov 2026. Eaton's ABM figure is a vendor claim. Warranty for small Vertiv units and APC Smart-UPS in Singapore was not confirmed — check the warranty card for the model you buy.

Which UPS design does your equipment need?

Start here, because it decides the price band more than the logo does. A standby UPS passes mains power straight through and switches to battery when power fails. It suits a single desktop. A line-interactive UPS adds automatic voltage regulation (AVR), which corrects sags and surges without draining the battery. It is the usual choice for office PCs, network cabinets and small servers. An online double-conversion UPS converts all power to DC and back again, so the load never sees a transfer. It is for servers, storage and anything that can't tolerate even a brief switch-over.

We cover the line-interactive vs online decision for server racks in a separate guide. The short version: online units cost more and run warmer, and line-interactive with a pure sine wave output is enough for most office loads.

Why do watts and waveform matter more than the brand?

The VA number on the box is not what your equipment uses. Watts are. APC's own 1500VA models show the spread: the Back-UPS Pro BR1500GI is rated 865 W, the Smart-UPS SMT1500IC 1,000 W and the Smart-UPS On-Line SRT1500XLI 1,500 W, according to Schneider's Singapore product pages. The same spread exists across every brand's catalogue, so compare the watt rating of each model on its datasheet. Our post on why a 1500VA UPS can't always run a 1500W PC explains the maths.

Waveform is the other split. Entry ranges often output an approximated or stepped sine wave on battery. Higher ranges, such as APC Smart-UPS or the line-interactive Eaton models sold as sine wave, output a pure sine wave. APC warns that power supplies with active power factor correction can draw a high inrush at transfer, so it recommends sizing their input at 1.25 times the supply's rated output. For workstations and servers, a pure sine wave model is the safer pick.

Compare models, not logos: design, real watts, waveform, battery type, monitoring, and who replaces the battery in Singapore.

Lead-acid or lithium-ion?

All three vendors now offer lithium-ion models. APC gives sealed lead-acid (VRLA) batteries a life of three to five years and lithium-ion eight to ten. That changes running costs: over ten years a VRLA unit needs one to three battery replacements on those figures (CALC), while a lithium-ion unit may need none. Lithium-ion models cost more upfront, so the decision depends on how long you keep the UPS and how hard it is to replace batteries where it sits.

Heat matters more in Singapore than in most markets. APC says VRLA life roughly halves for every 8 °C above the 20–25 °C ideal, and Eaton gives a similar rule. Singapore's 2025 annual mean temperature was 28.1 °C, according to the Meteorological Service, so a UPS in a warm storeroom or an unventilated cabinet will need batteries sooner than the brochure suggests. We explain how to spot a failing battery in this guide.

What should you check about monitoring and service?

Monitoring is where a UPS earns its keep in an unattended room. Ask three questions. Can it send alerts by email or SNMP when it goes on battery or a battery fails its self-test? Can it trigger a clean shutdown of your servers, virtual machines or NAS? And does that work with the software you already run? APC Smart-UPS units self-test at power-up and about every two weeks; many Back-UPS models test about every seven days. Network cards for all three brands are sold separately, so add the card to the quote if you need remote alerts.

Service is the other half. APC asks customers to contact technical support in the country of installation before any warranty replacement. Eaton's Malaysian terms say onsite response, where approved, is next business day within 30 km of a service centre, and that products bought outside authorised channels may be declined. Vertiv's Asia warranty for its larger units requires start-up by an accredited provider within six months of shipping. Buy through an authorised channel and keep the invoice: that matters more than which logo is on the front.

So which brand should you choose?

Choose the model that fits your load and your support arrangements. If your IT team already uses one vendor's management software or cards, sticking with that vendor saves effort. If you need a particular rack depth, runtime extension or lithium-ion option, the deciding range may only exist in one brand's catalogue. And if replacement batteries are hard to source for a model, its brand reputation won't help. For a cheap-UPS reality check, see whether a S$200 UPS can protect a S$10,000 workstation. If the UPS feeds a rack, plan the distribution too: our post on monitoring rack PDUs covers that.

Buying in Singapore

SourceIT lists all three brands (listed 8 Nov 2026). From APC: the Back-UPS Pro 1500VA (BR1500GI) at S$886.25 and the online Smart-UPS SRT 1500VA rackmount at S$2,436.25, plus the Network Management Card 3 at S$596.25. From Eaton: the line-interactive 5P Gen2 1550VA at S$736.80 and the online 9SX 1500VA at S$1,216.80. From Vertiv: the online Liebert GXE3 1kVA at S$720 and the lithium-ion Liebert GXT5 Li-ion 1.5kVA at S$3,204. Check each model's datasheet for its watt rating before you order. Browse more in our UPS and power protection collection. Prices change; ask for a current quotation. Use Request for Quotation on the product page, call (65) 6978 3502, email Sales@sourceit.com.sg or use our contact page.

Frequently asked questions

Is APC better than Eaton or Vertiv? Not as a brand. All three sell standby, line-interactive and online designs. Compare the specific model's watt rating, waveform, battery type, monitoring and local warranty instead.

Do I need an online double-conversion UPS? Only for loads that can't tolerate a transfer, such as servers and storage. Line-interactive with a pure sine wave output is enough for most office PCs and network cabinets.

Is a lithium-ion UPS worth the extra cost? Often, if you keep the UPS for many years. APC gives lithium-ion batteries eight to ten years against three to five for lead-acid, so you buy fewer replacement batteries.

Why does my UPS battery die sooner than the brochure says? Heat. APC says lead-acid life roughly halves for every 8 °C above 20–25 °C, and Singapore's average temperature is about 28 °C, so warm rooms shorten battery life.

Does it matter where I buy the UPS? Yes. Vendors route warranty claims through their local support, and Eaton's terms say products bought outside authorised channels may be declined. Buy from an authorised reseller and keep the invoice.