Sizing a solar system is simple once you know your monthly units.
3-step calculation
- Find monthly units on your BESCOM bill (or average the last 12 months).
- Divide by ~120 — 1 kW in Bangalore generates roughly 110–130 units a month.
- Convert to panels — with 545–590 Wp panels, you need about 2 panels per kW.
Examples
| Monthly units | System size | Panels (~550 Wp) | Roof area |
|---|---|---|---|
| 150 | 1.5 kW | 3 | ~130 sq ft |
| 300 | 2.5 – 3 kW | 5 – 6 | ~250 sq ft |
| 500 | 4 – 5 kW | 8 – 9 | ~400 sq ft |
| 1,000 | 8 – 9 kW | 15 – 17 | ~750 sq ft |
Try our solar savings calculator for an instant estimate including subsidy.
Get a precise system design after a free rooftop survey.
Get Free QuoteOther things to consider
- Future loads — EV charging, more ACs.
- Shadow from tanks and neighbouring buildings.
- Your sanctioned load with BESCOM.
Frequently Asked Questions
Will solar cover 100% of my bill?
It can cover most of your consumption; fixed charges on the bill remain.
Can I install more panels later?
Yes, but it's simpler and cheaper to size correctly from the start.
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Get Free QuoteDisclaimer: prices, tariffs and subsidy figures are indicative and based on publicly available information at the time of writing; they can change. Contact us for current, site-specific figures.
