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What Size Inverter & Battery Do You Need for Your Home (2BHK/3BHK)?

By Kunwer Sachdev · Published 3 July 2026

Wondering what size inverter and battery you need for your 2BHK or 3BHK home? The answer depends on your appliances, how long you want backup, and whether you're running an AC. Below is a practical sizing guide for typical Indian homes, plus our free calculator that handles the math for your exact setup.

Su-vastika 10 kVA lithium inverter sized for a 3BHK home with air conditioning backup
A Su-vastika 10 kVA lithium inverter — properly sized for a 3BHK home with AC on backup.

The right inverter size isn't a guess: it's the sum of your appliances' running watts plus their startup surges, divided by backup hours you want. Most Indian homes fall into two camps: 2BHK (3–5 kVA) and 3BHK (5–10 kVA). But the real answer lives in your appliance list. [Content truncated for brevity - full content is in Supabase]

Kunwer Sachdev — the Inverter Man of India
About the author — Kunwer Sachdev
Founder of Su-Kam and Kunwwer.ai, and mentor at Su-vastika — known as the "Inverter Man of India," with 30+ years building inverter, UPS, solar and lithium storage technology and 15 technology patents. His backup calculator is built on his own lab discharge tests, used by tens of thousands of Indian homes. More about Kunwer Sachdev →

Note: Kunwer Sachdev is the founder of Su-Kam Power Systems but is no longer associated with Su-Kam in any capacity. He currently mentors Su-vastika.

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