---
product_id: 105966466
title: "Vertiv Liebert PST5 UPS - 850VA/500W 120V Standby Power, 8 Outlets, Battery Backup with Surge Protection, LCD Screen, Energy Star Certified, 3 Year Warranty, Free Shutdown Software (PST5-850MT120)"
brand: "liebert"
price: "€ 123.70"
currency: EUR
in_stock: true
reviews_count: 8
category: "Liebert"
url: https://www.desertcart.ie/products/105966466-vertiv-liebert-pst5-ups-850va-500w-120v-standby-power-8
store_origin: IE
region: Ireland
---

# 316J surge protection Energy Star certified 850VA/500W battery backup Vertiv Liebert PST5 UPS - 850VA/500W 120V Standby Power, 8 Outlets, Battery Backup with Surge Protection, LCD Screen, Energy Star Certified, 3 Year Warranty, Free Shutdown Software (PST5-850MT120)

**Brand:** liebert
**Price:** € 123.70
**Availability:** ✅ In Stock

## Summary

> 🔌 Stay powered, protected, and ahead of the outage curve!

## Quick Answers

- **What is this?** Vertiv Liebert PST5 UPS - 850VA/500W 120V Standby Power, 8 Outlets, Battery Backup with Surge Protection, LCD Screen, Energy Star Certified, 3 Year Warranty, Free Shutdown Software (PST5-850MT120) by liebert
- **How much does it cost?** € 123.70 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/105966466-vertiv-liebert-pst5-ups-850va-500w-120v-standby-power-8)

## Best For

- liebert enthusiasts

## Why This Product

- Trusted liebert brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Surge Shield:** 316 Joules surge protection guards against damaging spikes and surges
- • **Versatile Outlets:** 8 outlets with 4 battery-backed & 4 surge-only, including 2 widely spaced for bulky plugs
- • **Smart Connectivity:** USB communication with free software for real-time alerts and controlled shutdowns
- • **Power When It Counts:** 850VA/500W capacity keeps your critical devices running through outages
- • **Eco-Friendly Reliability:** Energy Star certified design saves power and supports sustainability goals

## Overview

The Vertiv Liebert PST5-850MT120 is a professional-grade UPS delivering 850VA/500W backup power with 316J surge protection. Featuring 8 outlets (4 battery-backed, 4 surge-only), USB connectivity for smart notifications, and Energy Star certification, it ensures your desktop, network, and entertainment devices stay safe and operational during power interruptions. Backed by a 3-year warranty, it’s the reliable choice for millennial professionals who demand seamless productivity and eco-conscious tech.

## Description

The Vertiv Liebert PST5 UPS - 850VA/500W 120V UPS is an energy-saving UPS solution that provides reliable and cost-effective protection for household or business electronics. This 850VA UPS offers ample run time to save work in progress and/or complete an orderly shutdown for your equipment when you experience a power outage. The single phase UPS has output connections of (8) NEMA 5-15R and input connection of a NEMA 5-15P with 6 ft cord. Ensure Availability It provides battery backup and surge protection during damaging surges, spikes or power outages. With easy controls, it safeguards IT devices such as desktop computers, gaming consoles, workstations, wireless networks and routers, surveillance systems and other electronics. Energy Efficient This Energy Star certified UPS meets eco-friendly requirements and helps in cost savings. Full Vertiv Warranty The Vertiv Liebert PST5 UPS, 350VA-850VA, standby UPS is backed by a 3-year Vertiv UPS warranty.

Review: Now I have three - The 350 VA model is not good for a PC. The Power Assist application - which worked flawlessly for me on Windows but not on Linux, will tell you that even if the average usage is below 50%, the moment you start a demanding task (a video rendering/conversion, a Photoshop filter or a heavy game), the consumption will go through the roof. It will hit above 100% of the UPS capacity, and after a few desperate beeps, your computer - and the UPS will be shut down, no questions asked. The solution is NOT to mute the UPS speaker. That will conceal the problem, not solve it. The solution is to get a more powerful model, that will never reach 100% capacity. Then you will not hear a single beep. This device can be good for your router, NAS, maybe TV. You decide which devices you want just to protect from surges, and what you want to continue working even after a power outage. But 359va it is not good for your desktop PC - unless it's a very humble piece of hardware, with a very low wattage CPU. On the photo: on the left side (surge only) are connected non-critical devices, such as the amplifier, or one monitor. On the right side (battery backed up). only one computer and one monitor. Interestingly, on Linux the consumption was much lower for the same tasks. The UPS never shut down. Under windows, the beeping was much more frequent and the shut down was inevitable. I had a few shut downs already, so the UPS will be upgraded to 600 VA. A year later: I've got two 600 VA and had to buy a third one, 850 va after I added a Nvidia GPU to my PC and started playing with local AI. I was able to launch the Power Assist app on Linux. The trick is to edit the 'powerassist' file. It is not an executable but a script that launches a Java application.
Review: The 850VA works well with my my desktop PC, 500VA for TV and DVR - The 850VA works well with my my Win-10 desktop PC and gives me about 8 minutes of run-time, starting shut-down of my PC at about 6 minutes. Wanted something to keep my rig running for a short time during short power outages and which shuts down my desktop PC automatically if the power is out more than a few minutes. I Hhave the UPS connected to my Win-10 desktop PC: 800 Watt power supply, 64GB RAM, 8GB GPU Card, two 24 inch monitors , a KVM switch, a 7-port USB hub, illuminated keyboard and mouse, and two Wi-Fi routers (two different ISPs). I followed the instructions and downloaded the software to manage automatically shutting down my PC if the power stays off more than a few minutes. This seems to shut down my PC when the battery power gets down to 15% , but there are no options for setting the action when it hits 50% or another number the user may prefer. Great product at a good price which Will help protect my PC from a hard shut downs due to short power outages. The 500VA gives me about 12 minutes if run-time with my 55inch TV and DVR. For short power outages this eliminates the nearly ten minute reboot of the DVR.

## Features

- SURGE PROTECTION AND BATTER BACKUP: UPS offers protection during damaging surges, spikes or power outages and USB communications for notifications and controlled shutdown with free software download.
- 8 OUTLETS: It has 4 surge only and 4 battery & surge outlets; 2 are widely spaced to accommodate transformer-block plugs without covering adjacent outlets.
- TEL/NETWORK DATA LINE PROTECTION: Surge protection for RJ45/11 for data line surge protection.
- ENERGY EFFICIENT: This Energy Star certified UPS meets eco-friendly requirements.
- NO HASSLE WARRANTY: 3-year full unit coverage including battery with advanced replacement warranty.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07BXZTR91 |
| Amperage | 7.09 |
| Battery Average Life | 5 years |
| Battery Cell Type | Lead Acid |
| Battery Charge Time | 7 Hours |
| Best Sellers Rank | #30 in Computer Uninterruptible Power Supply Units |
| Brand | Liebert |
| Built-In Media | UPS Unit^USB Type A to USB Type B, 2 meter (~6.5 ft) in length |
| Color | Black |
| Connector Type | NEMA |
| Customer Reviews | 4.3 out of 5 stars 2,267 Reviews |
| EU Spare Part Availability Duration | 3 Years |
| Enclosure Material | Plastic |
| Frequency Range | 60 Hz (± 3 Hz) |
| Global Trade Identification Number | 00812105029127 |
| Input Voltage | 120 Volts (AC) |
| Item Dimensions D x W x H | 6.24"D x 12"W x 3.82"H |
| Item Height | 3.8 inches |
| Item Type Name | Standby UPS |
| Item Weight | 1 Pounds |
| Lower Temperature Rating | 32 Degrees Fahrenheit |
| Manufacturer | Vertiv |
| Maximum Power | 500 Watts |
| Model Number | PST5-850MT120 |
| Number of Outlets | 8 |
| Output Current | 4.17 Amps |
| Output Voltage | 120 Volts (AC) |
| Output Wattage | 500 |
| Power Plug Type | Type A - 2 pin (North American) |
| Runtime | 1 minute |
| Surge Protection Rating | 316 Joules |
| UPC | 812105029127 |
| Unit Count | 1.0 Count |
| Upper Temperature Rating | 104 Degrees Fahrenheit |
| Voltage | 120 Volts |
| Warranty Description | 3 Year |
| Wattage | 500 watts |

## Product Details

- **Brand:** Liebert
- **Battery Cell Composition:** Lead Acid
- **Product Dimensions:** 6.24"D x 12"W x 3.82"H
- **Voltage:** 120 Volts
- **Color:** Black

## Images

![Vertiv Liebert PST5 UPS - 850VA/500W 120V Standby Power, 8 Outlets, Battery Backup with Surge Protection, LCD Screen, Energy Star Certified, 3 Year Warranty, Free Shutdown Software (PST5-850MT120) - Image 1](https://m.media-amazon.com/images/I/51Yz8afPZTL.jpg)

## Available Options

This product comes in different **Pattern, Size** options.

## Questions & Answers

**Q: Is this ups expected to last longer than 3 years? is the battery replaceable? is there a way to disable beeping?**
A: Thank you for your question.  Yes, the UPS is designed to last longer than 3 yrs. It comes with a standard 3 yr. warranty. The battery inside this PST5 UPS is VRLA and depending on environmental and use factors will need to be replaced typically in 3-5 years under standard temperature environments and following recharge guidelines in the manual.  We do offer Lithium in our PSI5 series that has 2-3X the life of VRLA and takes the heat even better.
Beeping along with the LED color is alerting you to draw your attention to the unit as a warning indicator. Page 17 of our manual highlights 1 beep/sec rate is notice that the load devices attached to the output of the UPS are exceeding the UPS rating and one should reduce the load plugged into the UPS.  2 beeps/5 sec or 3 beeps/30 seconds indicate the battery is week.  Charge the ups or replace the battery.  We have not designed this unit with disable alarm functionality.
Yes, the battery is replaceable.

**Q: Does it beep on outage and can you mute it?**
A: Yes it does beep.   You can however mute the device during an outage by pressing the button on the front.   I have the 850VA and purchased in 2021.

**Q: What is the surge suppression/protection rating (in joules)?**
A: 316 Joules. It's written in the manual under specifications.

**Q: What is the maximum operating temperature of this device?**
A: Operating temperature range is 32-104F (0 to40C).  Most applications are used for protecting desktop computers, gaming consoles, wifi routers and other electronics, typically in an indoor setting.  Please contact our Vertiv for other uses.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Now I have three
*by O***N on March 5, 2023*

The 350 VA model is not good for a PC. The Power Assist application - which worked flawlessly for me on Windows but not on Linux, will tell you that even if the average usage is below 50%, the moment you start a demanding task (a video rendering/conversion, a Photoshop filter or a heavy game), the consumption will go through the roof. It will hit above 100% of the UPS capacity, and after a few desperate beeps, your computer - and the UPS will be shut down, no questions asked. The solution is NOT to mute the UPS speaker. That will conceal the problem, not solve it. The solution is to get a more powerful model, that will never reach 100% capacity. Then you will not hear a single beep. This device can be good for your router, NAS, maybe TV. You decide which devices you want just to protect from surges, and what you want to continue working even after a power outage. But 359va it is not good for your desktop PC - unless it's a very humble piece of hardware, with a very low wattage CPU. On the photo: on the left side (surge only) are connected non-critical devices, such as the amplifier, or one monitor. On the right side (battery backed up). only one computer and one monitor. Interestingly, on Linux the consumption was much lower for the same tasks. The UPS never shut down. Under windows, the beeping was much more frequent and the shut down was inevitable. I had a few shut downs already, so the UPS will be upgraded to 600 VA. A year later: I've got two 600 VA and had to buy a third one, 850 va after I added a Nvidia GPU to my PC and started playing with local AI. I was able to launch the Power Assist app on Linux. The trick is to edit the 'powerassist' file. It is not an executable but a script that launches a Java application.

### ⭐⭐⭐⭐⭐ The 850VA works well with my my desktop PC, 500VA for TV and DVR
*by C***. on March 23, 2025*

The 850VA works well with my my Win-10 desktop PC and gives me about 8 minutes of run-time, starting shut-down of my PC at about 6 minutes. Wanted something to keep my rig running for a short time during short power outages and which shuts down my desktop PC automatically if the power is out more than a few minutes. I Hhave the UPS connected to my Win-10 desktop PC: 800 Watt power supply, 64GB RAM, 8GB GPU Card, two 24 inch monitors , a KVM switch, a 7-port USB hub, illuminated keyboard and mouse, and two Wi-Fi routers (two different ISPs). I followed the instructions and downloaded the software to manage automatically shutting down my PC if the power stays off more than a few minutes. This seems to shut down my PC when the battery power gets down to 15% , but there are no options for setting the action when it hits 50% or another number the user may prefer. Great product at a good price which Will help protect my PC from a hard shut downs due to short power outages. The 500VA gives me about 12 minutes if run-time with my 55inch TV and DVR. For short power outages this eliminates the nearly ten minute reboot of the DVR.

### ⭐⭐⭐⭐ It works as designed
*by T***R on June 23, 2024*

I want to begin by stating my bona fides. Before retiring, I was an IT field service technician. Among other things, I dealt with UPS service and replacement in corporate and retail environments. It would appear that some reviews don’t understand the proper purpose of a UPS for home systems. It is designed to prevent your device from crashing during a power outage so that you may properly shut down the device. It is NOT INTENDED to allow you to continue operating on the device in the absence of house current. That is what a laptop will do (For a limited time.) It is NOT INTENDED to run your refrigerator, ac unit, and computer device simultaneously. All UPS devices have a load level. And will complain loudly if you exceed that capacity. So, does this device perform as indicated? YES. I run a dual display and a PC off of the battery side of the UPS. And I had a power outage not too long ago, and the UPS supported my PC for at least 20 minutes. Allowing me to perform a proper shut down of the PC. The connections on the UPS are as follows. Four battery backup AC plugs, Four surge protection only AC plugs, RJ45 (Internet cable) surge protection (Input and Output), RG58 (Cable TV cable) surge protection (Input and Output), USB communication port, USB charging port, and an LCD Display. IMHO, the RG58 and the USB communication ports are superfluous. Fewer people continue to use older style cable, and while the diagnostic data is helpful in a corporate environment, for the home user, it is unnecessary. The LCD diagnostics are good, and the LCD panel is bright. I have mine mounted against the side of my desk hutch. However, because of the location of the ports, you have to mount it vertically. If you mount it horizontally, the ports will be difficult to access. All in all, I find that this device works properly, has good (And some unnecessary) features and connections, and seems to be of quality design. BTW, my model number is PST5.

## Frequently Bought Together

- Vertiv Liebert PST5 UPS - 850VA/500W 120V Standby Power, 8 Outlets, Battery Backup with Surge Protection, LCD Screen, Energy Star Certified, 3 Year Warranty, Free Shutdown Software (PST5-850MT120)
- CyberPower ST425 Standby UPS System, 425VA/260W, 8 Outlets, Compact, Black
- CyberPower CP1500PFCLCD PFC Sinewave UPS System, 1500VA/1000W, 12 Outlets, AVR, Mini Tower,Black

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.ie/products/105966466-vertiv-liebert-pst5-ups-850va-500w-120v-standby-power-8](https://www.desertcart.ie/products/105966466-vertiv-liebert-pst5-ups-850va-500w-120v-standby-power-8)

---

*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-02-22*