10 October 2023

KVA or KW When Sizing a Battery (Here's What To Do)

Size Your UPS Battery Correctly

One area of confusion is whether to use KVA (kilovolt-amperes) or KW (kilowatts) when sizing a battery for a UPS system.

Understanding KVA and KW

Sizing a battery correctly kVA

Before we jump into the battery sizing, it's essential to understand what KVA and KW represent.

  • KVA (Kilovolt-Amperes): KVA represents the total power supplied
  • KW (Kilowatts): KW, represents real power, which is the actual energy consumed by electrical equipment.

The Battery Sizing Complications

Here's where the KVA vs. KW dilemma comes into play. Some UPS systems are rated in KVA, while others are rated in KW. The choice of which rating to use for battery sizing depends on the type of UPS system you have.

For UPS Systems Rated in KVA:

If your UPS system is rated in KVA, you should base your battery sizing on KVA. This is because KVA includes both real power (KW) and reactive power, which is relevant for sizing the battery to support the entire load, including the reactive power component.

For UPS Systems Rated in KW:

If your UPS system is rated in KW, you can base your battery sizing on KW, as KW represents the real power consumed by your equipment. In this case, you are sizing the battery to support only the actual power draw of your critical load.

Our Advice and Guidance

It's essential to consult the documentation provided by the UPS manufacturer. The documentation should clearly specify whether the UPS system is rated in KVA or KW and provide guidelines for battery sizing accordingly. Alternatively, Contact Us Today, we are experts in power protection and will be able to help you.

Always refer to the manufacturer's documentation and seek guidance from a qualified professional to make informed decisions about UPS sizing and battery requirements for your specific needs. By doing so, you'll be well-prepared to keep your critical equipment running smoothly, even in the face of unexpected power interruptions.

Unit 5, Optima Business Park
Pindar Road

Tel: 01920 871077
e-mail: sales@cetronicpower.com

Cetronic is an ISO9001:2015 Certified Company.
Registered in England 04458917

Privacy and Cookies

UKAS Certificate Management SystemsRiello Authorised Reseller 2023Riello Service Partner 2023
Top crossmenu linkedin facebook pinterest youtube rss twitter instagram facebook-blank rss-blank linkedin-blank pinterest youtube twitter instagram