Switching to solar is not just about panels — your inverter and battery setup decides how much usable electricity your home gets and how long backup power lasts. Most Indian households struggle to size the right inverter-battery combo, especially for 2BHK and 3BHK homes where power needs differ. Let’s simplify this with real-world numbers.
Why Inverter & Battery Sizing Matters
- An undersized inverter won’t run appliances smoothly, leading to overload trips.
- A small battery bank will drain quickly during power cuts.
- An oversized system means wasted money on extra capacity you don’t use.
Correct sizing ensures optimal performance, cost savings, and longer life for your solar setup.
Power Needs for Indian Homes
Typical Daily Load (2BHK vs 3BHK):
| Appliance | 2BHK (Watts) | 3BHK (Watts) |
|---|---|---|
| Fans (4–6) | 300–400 | 450–600 |
| LED Lights (6–10) | 120–200 | 180–300 |
| TV + Set Top Box | 120 | 150 |
| Fridge | 250–300 | 300–400 |
| Laptop/Router | 100 | 150 |
| Total | 900–1100 W | 1300–1600 W |
Recommended Inverter Size
- 2BHK Home: Go for a 1.5–2 kVA inverter. This can handle basic lighting, fans, TV, and fridge.
- 3BHK Home: Opt for a 2.5–3 kVA inverter. This covers extra fans, lights, larger fridge, and more appliances.
Pro Tip: Always keep 20–25% buffer to avoid overload during peak use.
Recommended Battery Bank
- 2BHK: 2 × 150Ah (12V) batteries (≈ 3–4 hours backup).
- 3BHK: 3–4 × 150Ah (12V) batteries (≈ 4–6 hours backup).
Lithium-ion batteries are more expensive but last 2–3× longer than lead-acid batteries.
Cost Estimate (2025 India)
| System | 2BHK Home | 3BHK Home |
|---|---|---|
| Inverter | ₹12,000 – ₹18,000 | ₹18,000 – ₹25,000 |
| Batteries | ₹20,000 – ₹30,000 | ₹35,000 – ₹50,000 |
| Total | ₹32,000 – ₹48,000 | ₹53,000 – ₹75,000 |
Why It Matters for Indian Families
- 2BHK homes can run comfortably on a smaller setup, cutting upfront costs.
- 3BHK homes need bigger storage and inverter capacity to avoid frequent cutoffs.
- Both setups benefit from pairing with rooftop solar panels + subsidy, reducing electricity bills to near-zero.
Choosing the right solar inverter and battery bank is as important as selecting panels. For a 2BHK or 3BHK home, correct sizing ensures you enjoy seamless power, reduced bills, and full benefit of government subsidies.
Find the Perfect Inverter & Battery for Your Home
Don’t overspend on oversized systems. Use our free Solar ROI & Sizing Tool to calculate the right inverter-battery combo for your 2BHK or 3BHK home, and see how much subsidy you qualify for in 2025.
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