# How to select the Right Inverter Rating?

**URL:** <https://forumautomation.com/t/how-to-select-the-right-inverter-rating/14589>\
**Category:** Electrical\
**Tags:** calculator\
**Created:** [November 11, 2026, 2:49pm UTC](https://forumautomation.com/t/how-to-select-the-right-inverter-rating/14589 "2026-11-11T14:49:38Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![Rabert](https://forumautomation.com/user_avatar/forumautomation.com/rabert/32/6784_2.png) [@Rabert](https://forumautomation.com/u/Rabert)\
**Post date:** [November 11, 2026, 2:49pm UTC](https://forumautomation.com/t/how-to-select-the-right-inverter-rating/14589/1 "2026-11-11T14:49:39Z")

</div>

## **How to select the Right Inverter Rating?**

## 1. Calculate the Total Connected Load

 ![image](https://cdn.forumautomation.com/original/2X/5/5359a21501ee37957ecfc0bdab0d7e5dbffc7493.png)

## 2. Apply a Safety Margin

Total Load = 370 × 1.25 = 462.5 W

## 3. Calculate the Inverter VA Rating

Assuming an inverter power factor of 0.8:

**[Inverter Rating](https://forumelectrical.com/ups-inverter-battery-backup-time-calculation-with-load-calculation-and-battery-selection-charts/)** = 462.5 / 0.8 = 578.1 VA

Recommended Selection: 600 VA minimum based on the calculated load. Consider a higher-rated inverter after checking motor starting surge, battery voltage and manufacturer specifications.

 ![1](https://cdn.forumautomation.com/original/2X/6/6252929a16230f034b886575e5fdbb9e39309689.jpeg)