How to Choose the Right UPS Capacity for Your Event or Office — A Simple Guide






Power outages can impact negatively on both offices and venues hosting events. For example, issues arise from lack of reliable electricity when hosting a corporate seminar or wedding; at an exhibition, or when you have a lot of people moving through an office. The solution is an Uninterruptible Power Supply (UPS). However, knowing how to choose the right UPS size for office can be very confusing to some people.


By understanding your power requirements and calculating the appropriate size UPS based on kVA, you will be able to operate smoothly without fear of failure of your systems or having your equipment shut down due to lack of power. This information will explain how to calculate the proper size UPS for your facility, how kVA functions and what factors should be taken into consideration when renting or purchasing a UPS.


The Meaning of kVA in UPS Systems

When purchasing an uninterruptible power supply (UPS), a user should have a basic understanding of "kVA", which means kilovolt-ampere. The kVA number represents the total amount of electrical load (apparent power) that can be connected to a UPS system and determines the total capacity of the unit.


Many people incorrectly assume that kW (kilowatt) and kVA are the same thing, when in fact they are not. A kW is the actual amount of power that equipment uses, while the kVA is the total amount of power being delivered to the equipment. The difference between the two numbers can be found by using the power factor, which normally ranges from about 0.8 to 0.9 with the majority of commercial equipment.


To use an uncomplicated formula to determine your intended size requirements for a UPS, divide the total load of your equipment (in watts) by 1000, and then divide again by the power factor.


For instance, if your equipment load is 8000 watts, and the power factor is 0.8, your calculated UPS size would be:


8000 / 1000 / 0.8 = 10 kVA UPS


This simple kVA calculator for events can assist you in determining the minimum size of UPS necessary to use for any event or business and will help to ensure that all electrical devices in the business are being supplied with safe electrical equipment.


Determine The Electric Power Needs Of Each Individual Set Up

The next step after choosing a UPS system will be to establish the total electrical power usage by the devices needed for the set up. The amount of electrical power required by various electrical devices varies according to the nature of the set up.


Small Event Set-Up: DJ, Small Gathering

A small event set-up may use basic electronic devices such as:


  • DJ mixer(s) and speaker(s)

  • LED lighting fixture(s)

  • Notebook computer(s) or other computerized music devices.

  • Small video displays


Although each device may have different electrical power needs based on use and position within the set up, it is common for small event setups to range between 3,000 watts and 7,000 watts for total power requirement. Therefore, an average UPS capacity of 5kVA-10kVA will typically support the capabilities of a small event setup’s audio system and lights, with an estimated timeframe to continue Power Supply during momentary power failure.


Medium Event Setup (Corporate Events or Exhibitions)

Medium-Sized Events typically have more equipment, so they may require:


  • Audio/Visual Equipment

  • Projectors / LED Displays

  • Stage Lighting

  • Sound Amplifiers

  • Computer Equipment for Registration/Ticketing


Depending on the overall load, the UPS will need to be rated between 20 KVA and 50 KVA to support loads of 15 KVA - 40 KVA.


These systems provide continuous presentations, stage lighting & sound systems required at professional events.


Wedding locations could also utilize large venues

Wedding Venues Will Require More Power


Because of the use of large amounts of lighting, sound systems, and decorative setups for events in large venues, the amount of power required per event is usually a significant amount per event. Therefore various equipment can include:


  • Large LED video walls

  • High-powered sound systems

  • Decorative lighting systems

  • Catering equipment (e.g. ovens)

  • Cooling systems (e.g. air conditioning/dehumidification).


However, an event venue may require a UPS rating that exceeds 100 kVA, and could be as high as 500 kVA, depending upon the size of the event.


A reliable power back up will allow you to ensure you can continue running your event with no technical interruptions.


How to Determine the Correct Size UPS for Your Office

It is important to always have a constant power source in an office; many offices have numerous computers, servers and consumable devices.


A typical office might need uninterrupted power for:


  • desktop or laptop computers

  • Wi-Fi routers and network switches

  • servers and storage systems

  • printers/office peripherals

  • security/surveillance systems


Small offices need a UPS size of around 5kVA -10kVA, medium-sized offices typically need a UPS size of between 20kVA -60kVA, whilst larger corporate offices or IT offices often need UPS sizes over 100kVA.


To find the right UPS for your office, consider factors such as location, electricity price, and type of power equipment. You want to make sure you have enough backup power to keep things running when an outage occurs.

Capacity of Uninterruptible Power Supplies (UPS): 10kVA to 5000kVA

UPS systems are available with various capacities to meet a variety of applications. Selecting an appropriate capacity for an application is determined by the size of the facility in which they will be used.


Here are some guidelines to follow:


  • 10kVA - 20kVA: Small offices, DJ (Disc Jockey) setups, and small gatherings/events.

  • 20kVA - 100kVA: Medium offices, exhibitions, and corporate events.

  • 100kVA - 500kVA: Large gatherings/events, banquet halls, and distribution centers/warehouses.

  • 500kVA - 5000kVA: Data centers, very large commercial and industrial facilities, and very large exhibitions/events.


UPS systems designed for large applications are engineered to provide sufficient stable electrical power for significant loads while supplying sufficient stable electrical power for equipment requiring sensitive or critical electrical power.


Hiring a UPS: Requirements Before Renting a UPS

When renting or installing a UPS, consider these factors first. 


1. Determine Total Equipment Load

Write down all of the electrical items you will be using and the total amount of watts you need. 


2. Accounts for Future Expansion 

You should always buy a UPS that is capable of handling more than what you currently need so that you have the additional capacity when you add new items to your load.


3. Backup Duration 

The UPS should give you enough time to finish what you were doing if the electricity goes out, so determine the amount of time you need to complete everything and the amount of time your UPS will be able to support you.


4. Amount of Installation Space 

There needs to be enough room in the area you are going to be installing the UPS and batteries to allow for airflow.


5. Technical Support 

Make sure that your provider offers assistance with installation, maintenance, and emergency services for the UPS.


Final Thoughts

The most crucial factor to prevent power outage or reduced efficiency is selecting the right size of Uninterruptible Power Supply (UPS) system for your business and its equipment. To ensure you select the best size UPS system, you need to know what a kilovolt-ampere (kVA) is; then, by calculating your actual load, you will be able to choose a UPS sized correctly to provide backup power and protect your equipment from damage and power interruptions.


UPS systems can range between 10 kVA and 5000 kVA from small DJ setups to large corporate venues and have scalability to fit your needs. The proper planning and proper calculation of your loads will ensure you have a UPS system that will operate properly when the time comes to replace or add to your existing backup power system.


For those businesses and event planners, there are many reliable and trusted companies like Capital Power Backup that provide professional UPS rental services to meet your varying capacity needs and ensure you have a reliable and continuous source of power.

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