Skip to main content

How to calculate the battery backup time of a UPS ?

To calculate the battery backup time of a UPS (Uninterruptible Power Supply), you need to know the following information:

  1. Battery capacity in Ampere-hours (Ah): This is the total amount of charge the battery can store. It's usually written on the battery or the UPS specification sheet.

  2. Load in watts (W): This is the amount of power the UPS is supplying to your devices. It's usually written on the device's label or the UPS specification sheet.

  3. Efficiency of the UPS (%): This is the percentage of power that the UPS can deliver to your devices compared to the power it draws from the wall outlet. It's usually written on the UPS specification sheet.

Once you have these three pieces of information, you can use the following formula to calculate the battery backup time of the UPS:

Battery backup time (in hours) = Battery capacity (in Ah) x Efficiency (%) / Load (in watts)

For example, if you have a UPS with a battery capacity of 100 Ah, an efficiency of 90%, and a load of 200 watts, the battery backup time would be:

Battery backup time = 100 Ah x 90% / 200 W = 45 hours

This means that the UPS can supply power to your devices for 45 hours if the power goes out, assuming that the load on the UPS remains constant and the battery is fully charged before the outage.

Comments

Post a Comment

Popular posts from this blog

Murach's JavaScript and DOM Scripting

by Ray Harris 20 chapters, 764 pages, 337 illustrations ISBN: 978-1-890774-55-4 Today, web users expect web sites to provide advanced features, dynamic user interfaces, and fast response times. To deliver that, you need to know the JavaScript language. Beyond that, though, you need to know how to use JavaScript to script the Document Object Model (or DOM). Now, at last, you can learn both JavaScript and DOM scripting in this one great book. In fact, by the end of chapter 3, you'll be able to develop and debug significant JavaScript applications. By the end of section 2, you'll know the complete JavaScript language and some elementary DOM scripting. And by end of section 3, you will have raised your DOM scripting skills to an expert level.
Post a Comment
Read more

Murach's Java SE 6

Murach's Java SE 6 by Joel Murach and Andrea Steelman 22 chapters, 810 pages, 351 illustrations ISBN-10: 1-890774-42-1; ISBN-13: 978-1-890774-42-4 "I love your Java book. It cuts right to the essential information, providing the perfect balance between too many details and too little information. I bought another well-known Java book, but I spent several hours trying to learn what I learned from your book in about 45 minutes." That's what one developer wrote us about the JDK 5 edition of our core Java book. Now, you can expect that same practical, time-saving approach in the current edition that covers the latest version of Java, Java SE 6. What you'll learn from the SE 6 edit...
Post a Comment
Read more

Murach's Java Servlets and JSP (2nd Edition)

by Joel Murach and Andrea Steelman    24 chapters, 729 pages, 329 illustrations ISBN-13: 978-1-890774-44-8 Ever since we published the first edition of this book back in 2003, we've been getting feedback like this from developers: "This book is excellent, excellent, excellent! The authors have a gift for developing the topic of JSP, Servlets, and building a Java-based ecommerce site in a methodical, easy-to-understand approach." Now, I'm delighted to tell you that you'll feel the same way about this new, 2nd edition. The content has been redone from start to finish, so you'll learn the best features, tools, and techniques for developing today's web applications (see what's NEW below).But our popular approach hasn't changed: This 2nd edition still presents Java web programming ...
Post a Comment
Read more