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Description
Vertiv Liebert APS 5kVA/4.5kW Power Module 208VAC | Replacement/ExpansionEnhance reliability and scale your data center or business critical power with the Vertiv Liebert APS 5kVA 4. 5kW Power Module for 208VAC systems. Engineered to integrate seamlessly with the AS3 and AS4 Series Liebert APS UPS, this module delivers dependable capacity growth, streamlined maintenance, and reduced downtime. Designed for expansion or replacement, it unlocks a path to higher availability without overhauling your existing infrastructure.
Enhance reliability and scale your data-center or business-critical power with the Vertiv Liebert APS 5kVA/4.5kW Power Module for 208VAC systems. Engineered to integrate seamlessly with the AS3 and AS4 Series Liebert APS UPS, this module delivers dependable capacity growth, streamlined maintenance, and reduced downtime. Designed for expansion or replacement, it unlocks a path to higher availability without overhauling your existing infrastructure.
- Powerful scalability: add 5 kVA / 4.5 kW of capacity to match rising workloads and maintain continuous uptime for essential equipment.
- 208 VAC performance: optimized for data centers, networks, and office environments that rely on standard 208-volt power distribution for reliable, consistent output.
- AS3 and AS4 compatibility: specifically designed to slot into Vertiv Liebert APS UPS units in the AS3 and AS4 Series, enabling straightforward upgrades and replacements.
- Hot-swappable design: engineered for minimal downtime during maintenance or replacement, helping to preserve service continuity.
- Compact, modular expansion: a space-efficient solution that scales without a complete system overhaul, simplifying field upgrades and future-proofing your power architecture.
Technical Details of Vertiv Liebert APS 5kVA/4.5kW Power Module 208VAC
- Power rating: 5 kVA / 4.5 kW, providing substantial reserve to protect against gradual load growth or sudden demand spikes
- Input/Output voltage: 208 VAC, aligned with common data center and enterprise power distribution standards
- Compatibility: designed for use as a replacement or expansion module in Vertiv Liebert APS UPS units within the AS3 and AS4 Series
- Form action: modular power module intended for straightforward installation into compatible UPS bays, minimizing service disruption
- Reliability emphasis: built to maintain steady performance under steady-duty operation, contributing to overall system uptime and resilience
How to install Vertiv Liebert APS 5kVA/4.5kW Power Module
- Power down the UPS system and disconnect it from all power sources, following your facility’s safety procedures to ensure a de-energized work environment.
- Open the service access panel of the compatible AS3 or AS4 Liebert APS UPS and locate the expansion/replacement bay designated for the 5kVA/4.5kW module.
- If replacing an existing module, carefully remove the old unit, noting connector alignments and any cooling or interlock interfaces that must be reattached to the new module.
- Carefully align the new power module’s connectors with the UPS backplane, then slide the module into place until it seats securely. Verify that locking mechanisms engage and that all connectors are fully seated.
- Reconnect any electrical harnesses or interconnects, ensuring secure, clean connections. Close the service panel and restore power to the unit.
- Power on the UPS and run a full self-test or diagnostic sequence as directed by Vertiv documentation. Monitor output readings to confirm correct voltage, frequency, and load balance, and verify that the system recognizes the new module.
Frequently asked questions
- What is the Vertiv Liebert APS 5kVA/4.5kW Power Module 208VAC used for? It is a replacement or expansion module designed to increase the power capacity of compatible Vertiv Liebert APS UPS systems (AS3/AS4 Series), delivering 5 kVA / 4.5 kW at 208 VAC to protect critical loads.
- Is the module hot-swappable? Yes. The design emphasizes hot-swappability to minimize downtime during maintenance or capacity upgrades.
- Which systems is it compatible with? It is intended for use with Vertiv Liebert APS UPS units in the AS3 and AS4 Series, enabling seamless expansion or replacement within those platforms.
- What voltage does it use? The module operates at 208 VAC for both input and output, matching common commercial and data-center power distributions.
- Do I need a technician to install it? For safety, accuracy, and warranty considerations, installation should be performed by qualified personnel familiar with UPS hardware and Vertiv installation guidelines.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.5 ★★★★★
Based on 5 reviews
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Product Reviews
★★★★★ 4
Comfortable, affordable, and great for small spaces!
Color: Light Purple, Color: Light Purple
I had previously left a review of two stars, but have since deleted that review after I've owned the chair for a few weeks now. Initially, I stated the chair was uncomfortable and not cushioned at all. But this issue quickly resolved after sitting it for a longer time, it seems the cushion molds to you. So it may be uncomfortable the first few times sitting on it, but it eventually softens. The cushion is now soft yet sturdy. You don't sink in too much, but it's comfortable for sitting for long periods of time. I personally enjoy the mesh back as well, it supports my lower back and doesn't cause back pain. Normally I have to use a cushion of my own to support my lower back for most chairs, but this one actually supports me in a way that doesn't require an extra cushion - so that's really nice.
The chair is fairly on the smaller end, which is perfect for low desks or tight spaces, which is exactly what I wanted. The height can be adjusted, but even at the highest setting, it is still fairly low. Keep that in mind - it may not be super comfortable for those over 6 ft. The arms flip up which makes storing it under a low desk very easy. The cushion is thick and very accurate to the picture. I love that it is lightweight and doesn't make much noise when rolling the chair. It also feels very sturdy. Some of the reviews say it feels flimsy, and I don't know if some are just assembling it incorrectly, because for me this thing is very strong and holds up quite nicely under my weight.
Overall, this is exactly what I wanted for my personal living space. A chair that's not too bulky, but comfortable enough to sit in for long hours. It functions as advertised for this purpose.
One final thing -- the color selection is gorgeous. I bought the light purple color and it fits my setup nicely! Color was accurate to the picture, and looks very cute and adorable in my space.
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Reviewed in the United States on December 21, 2025
★★★★★ 5
Exteremly comfortable
Color: Dark Black
Reasonably priced, very comfortable l, easy assembly
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Reviewed in the United States on May 24, 2026
★★★★★ 5
Surprisingly amazing chair!
Color: Pink, Color: Pink
tl;dr: If you need a chair that has the features of this one, then this one is a winner! Hits above its weight class for sure.
My wife is 5’. She’s small. For whatever reason she ended up with a chair made for big people, like 6+ feet and up to 500lbs type of a chair. She’d often even sleep on it and chill on it. The chair was big enough to fit 2 of her to be honest. It was an expensive chair that I won at some raffle and didn’t like myself. Over the years it ripped (got a cover for it) and even started to get lopsided (from the sleeping) and finally a spring broke (hence the pillow on it in the pictures)
She obviously lives pink. I also wanted to get a chair where she could work and not end ip asleep on. Not like we have a couch or a bed for that 😂.
This chair is very obviously smaller than her previous chair, it’s also significantly cheaper in price and build, it’s also not as durable feeling or stable, and it’s just not as padded. Yet somehow it’s an amazing chair that we both like better than her previous chair???
Like it’s crazy that this chair somehow works better in so many ways. Her desk is modified to be shorter than normal desks (again, she small lol) and her previous chair was just too big. The wheels are also like SUPER smooth, like you can run a chair race easily with it. It rolls over her rug and tucks into her desk (which is in our bedroom) easily. The amount of space this has save us when the chair isn’t being used is a lot. Previous chair was much bigger and didn’t tuck in at all.
The color is nice and the padding is plenty for a small and much lighter than 500lbs woman. I’m 6 feet and 200 lbs and the chair is nice for me as well. My chair is bigger and more secure in the backing, which is similar to this one. The lowest tension setting on my chair is still too high for her to lean back on my chair. This chair has a lower tension minimum and she can easily lean back freely, as well as keep enough tension to work without sagging.
This chair is surprisingly outstanding! I’m sure my wife will destroy it quicker than the last one, but it’s so cheap that even if it only lasts 1-3 years, I’ll happily buy it ones or twice more 🤷🏽♀️. Maybe by then they’ll invent a comfortable titanium chair that’s affordable that she won’t destroy 😂.
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Reviewed in the United States on February 28, 2024
★★★★★ 3
Mid.
Color: Light Purple
The chair is fine, and reasonably easy to put together. However, I've been using it for a little over a year and a half, and it's already falling apart. Random parts of it have fallen off, which is fine because it was still functional. But now the most frustrating part is that the wheels continue to pop off, and while the first attempts to pop them back on worked, they will not stay on now. This is obviously greatly impacting the stability, and I will need to purchase a replacement soon. For this price and lack of long-term durability, I would not buy again.
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Reviewed in the United States on January 4, 2026
★★★★★ 5
Alexa messed me up, but the company of the chair made it right!
Color: Light Purple, Color: Light Purple
I wanted something small with arms that moved out of the way when I wanted to slide my chair all the way into my desk for more space. This fit the bill. I loved the color blue and I had that in my cart for a bit. One day Alexa mentioned that an item that was in my cart was on sale. It was the chair. I let it be ordered. When it came it didn't exactly look blue to me. But I kept putting it together thinking maybe it was the lighting in the room I was assembling it in. I brought it to my craft room and lo and behold it is light purple. I looked at my order and sure enough it said light purple. Boo! I looked in my saved cart and the chair was gone. So I accepted it for an error. The next day I checked to see if I could return it. Thought I could, till I read that I would have to pay to return it. So I wrote the seller to tell them to ignore the return. And that was that. Till a couple days later I get an email from the seller asking if I would like a full refund or a replacement at no cost. I was like heck yeah send me the blue one. I was thrilled and I wanted to thank the seller for doing this without the return of the other chair. But I could not find a place to do that now. So here is where I will thank you. Thank you so much for doing this for me. You guys are AWESOME!. I love the chair and I love the blue color. I find it very comfortable, lite, easy to adjust, the size works great for me, and for the price the quality fits my needs. I do hope it lasts me for quite some time. Thanks again!
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Reviewed in the United States on January 9, 2026