When there’s a power cut, your inverter takes center stage. But many users still ask a basic but important question: “How do I know which inverter VA is right for my home?”
The answer is simple—you need to think about how many appliances you want to run during a power cut, not the total electrical load of your entire home. Your choice of inverter should be based on your backup requirement, not just size or assumptions.
This blog will help you calculate your VA requirement with a clear method and guide you through the ideal Okaya inverter options for small, medium, and heavy usage homes.
| Sr. No. | Table of Contents |
| 1 | What Is VA and Why It Matters |
| 2 | How to Calculate the Right VA Inverter |
| 3 | Okaya Home UPS Models and What They Support |
| 4 | Okaya Hi-Capacity UPS for Bigger Loads |
| 5 | Need Help? Contact Okaya Support |
| 6 | FAQs |
| 7 | Conclusion |
VA stands for Volt-Ampere—a unit used to measure how much electrical load an inverter can handle at one time.
Let’s simplify:
VA = Load Handling Capacity (how many devices it can power)
Battery = Backup Time (how long those devices will run)
So, if your VA is too low, your inverter will overload and shut down. If it’s too high, you’ll spend more than necessary. The right VA ensures smooth operation without overload, which makes it the most critical number to get right.
Here’s the simplest way to determine what VA rating you need:
VA = Total Wattage of Appliances ÷ 0.7 (Power factor)
Example:
Let’s say you want to run 2 fans (80W each), 4 LED lights (15W each), and a TV (100W):
Total = 80×2 + 15×4 + 100 = 370W Now: 370 ÷ 0.7 = ~530 VA
In this case, a 700 VA inverter is the safe and practical choice. This calculation is the key to selecting the right inverter—not guesswork or generic advice.
Okaya’s Advanced Home UPS range uses true sine wave technology and is built for small and medium homes. Here’s what each model typically supports:
| Model | VA Rating | Ideal For | Appliances It Can Run |
| ATSW 950 | 700 VA | 1BHK basic | 2 fans, 2–3 LED lights |
| ATSW 1175 | 925 VA | 1BHK smart | 2 Fans, 4–5 lights, Wi-Fi, TV |
| ATSW 1400 | 1150 VA | 2BHK starter | 3 fans, 5 lights, Wi-Fi, TV, laptop |
| ATSW 1700 | 1450 VA | 2BHK + kitchen | Fans, lights, mixer, TV, router |
| ATSW 1900 | 1650 VA | 2–3BHK usage | Above + fridge |
| ATSW 2550 | 2000 VA | 3BHK full load | Fans, lights, fridge, TV, washing machine |
These models are ideal for everyday residential use where clean power and smooth performance matter.
You can explore Okaya's full range of Home UPS options on the official website or through Okaya-authorized dealers. If you're looking to buy home inverter at best price, this range offers performance, protection, and peace of mind.
If you need to support heavier appliances or run equipment in an office, shop, or clinic—Okaya’s Hi-Capacity UPS range is built for that.
| Model | VA Rating | Ideal For | Appliances It Can Run |
| ATSW 3050 | 2500 VA | 3BHK heavy-duty home / shop | TV, fridge, lights, mixer, kitchen appliances |
| ATSW 3750 | 3200 VA | Clinics, showrooms, offices | Fans, desktops, printers, CCTV, Wi-Fi, POS systems |
| ATSW 4550 | 4000 VA | Labs, small factories, dental setups | Deep freezer, dental chair, pumps, ACs (split), servers |
| ATSW 6650 | 6100 VA | Petrol pumps, critical setups | Water pumps, compressors, telecom racks, multiple ACs, medical equipment |
These models are ideal for setups that require longer runtime, multi-battery setups, and heavy-duty usage. If you're planning to buy Hi-Capacity UPS online or offline, explore this category on the Okaya website or through verified local shops.
If you're still confused about which VA inverter or UPS model is right for your home or commercial setup, don't worry—Okaya's expert team is here to guide you. Whether you're calculating for your home or selecting a Hi-Capacity UPS for your high-usage or commercial requirement, our technical team will help you understand your power needs and recommend the most suitable inverter, battery, and setup.
You can reach out to our support team via WhatsApp at +91 9818909090, call us directly at +91 9818 909090, or email us at care@okaya.in for personalised guidance.
Alternatively, you can also visit your nearest Okaya-authorised inverter shop to get face-to-face assistance. Just go to www.okaya.com, open the Dealer Locator, and enter your location or pin code. You’ll find a list of nearby Okaya-authorised dealers who can guide you on which inverter model fits your needs best. Once you're confident, you can make your purchase directly from the store.
Support is available both online and offline—choose what works best for you.
Choosing a VA inverter is not about guessing, overbuying, or copying what others are doing. It’s about understanding your actual power need during an outage, applying one simple formula, and matching that with the right inverter model.
From compact Home UPS systems for 1BHK flats to Hi-Capacity UPS models for shops and clinics, Okaya offers a trusted, technology-led solution for every backup need.
VA (Volt-Ampere) is the capacity of the inverter to handle electrical load. It shows how many appliances it can run during a power cut.
Use this formula: Total wattage of appliances ÷ 0.7 = required VA. Always buy the next available model with higher VA.
No. VA is about load, not time. Backup time depends on the battery capacity and health.
Yes, models like ATSW 1900 and ATSW 2550 are built to support fridge, mixer, and washing machine (with correct batteries).
It ensures smooth, consistent power delivery—safe for sensitive appliances like LED TVs, laptops, routers, etc.
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