About this tool
Explore a rooftop-solar sizing and payback scenario using the electricity, generation and cost assumptions shown. Review the model with the actual roof, shading, location and provider quotation before planning an installation.
Calculations and file processing run in this browser tab. The tool does not send working inputs or files to our hosting server.
मुख्य इनपुट और नियंत्रण हिंदी में देखने के लिए ऊपर “🇮🇳 हिंदी में देखें” चुनें। गणना और फ़ाइल प्रोसेसिंग इसी ब्राउज़र टैब में होती है; टूल आपके इनपुट हमारी होस्टिंग पर नहीं भेजता।
Features
- Work with Average Monthly Electricity Consumption (Units / kWh); Current Grid Electricity Tariff (₹ per Unit); Benchmark Solar Plant Cost per kW (Before Subsidy) (₹).
- Review Recommended Plant Size; PM Surya Ghar Central Subsidy; Net Out-of-Pocket Cost in the result breakdown.
Benefits
- Compare system-size and cost assumptions.
- Keep generation and payback estimates separate from a quotation.
Who should use this tool?
- Households researching a rooftop-solar scenario.
- People reviewing an installer’s assumptions.
How to use
- Complete the labelled fields for your scenario, including Average Monthly Electricity Consumption (Units / kWh); Current Grid Electricity Tariff (₹ per Unit); Benchmark Solar Plant Cost per kW (Before Subsidy) (₹). Use the units shown beside each field.
- Try the example labelled “360 Units/Month Household → 3 kW Plant (₹78,000 Subsidy)” if you want to check the workflow first.
- Select Calculate / Run Tool and review Recommended Solar System & Net Cost After Subsidy and Recommended Plant Size; PM Surya Ghar Central Subsidy.
- Check the assumptions and limitations below. Adjust a value to compare scenarios, then copy or download the result you need.
Try these worked examples
| Scenario | Example inputs | Example result |
|---|---|---|
| 360 Units/Month Household → 3 kW Plant (₹78,000 Subsidy) | Average Monthly Electricity Consumption (Units / kWh): 360Current Grid Electricity Tariff (₹ per Unit): 8Benchmark Solar Plant Cost per kW (Before Subsidy) (₹): 60000 | 3 kW System | Net Cost: ₹1,02,000 (Payback: ~3 Years) |
| 240 Units/Month Household → 2 kW Plant (₹60,000 Subsidy) | Average Monthly Electricity Consumption (Units / kWh): 240Current Grid Electricity Tariff (₹ per Unit): 7.5Benchmark Solar Plant Cost per kW (Before Subsidy) (₹): 62000 | 2 kW System | Net Cost: ₹64,000 (Payback: ~3 Years) |
Reference and processing
MNRE — PM Surya Ghar Muft Bijli Yojana Subsidy Structure (₹30k/₹60k/₹78k) · Listed applicability: 2025-2026
Calculations and file processing run in this browser tab. The tool does not send working inputs or files to our hosting server.
FAQs
Does the calculation guarantee generation or subsidy approval?
Generation depends on the site and equipment, and subsidy eligibility follows the relevant current programme conditions. The model does not inspect a roof or approve an application.
Which inputs do I need for Solar Rooftop System Size (kW), Subsidy & Payback Calculator?
Use Average Monthly Electricity Consumption (Units / kWh); Current Grid Electricity Tariff (₹ per Unit); Benchmark Solar Plant Cost per kW (Before Subsidy) (₹). The built-in examples show how those fields fit together.
What should I check before using this result?
Assumes ~4 units (kWh) daily generation per 1 kW solar plant (~120 units/month/kW) across average Indian sunlight conditions. Check the assumptions and output against your intended task before relying on the result.
What happens to the information I enter?
Calculations and file processing run in this browser tab. The tool does not send working inputs or files to our hosting server. Tool favourites save only tool IDs in this browser. Sharing sends the tool link, not your working values or files.