Rooftop Solar in Mumbai — Complete 2025 Guide
Mumbai receives excellent solar radiation (~5.5 peak sun hours/day) making it ideal for rooftop solar. With MSEDCL net metering and PM Surya Ghar subsidy, the economics are very strong.
Solar System Cost in Mumbai
| System Size | Before Subsidy | After PM Surya Ghar | Monthly Generation |
|---|---|---|---|
| 1 kW | ₹65,000–₹80,000 | ₹35,000–₹50,000 | 130–150 units |
| 2 kW | ₹1,25,000–₹1,55,000 | ₹65,000–₹95,000 | 260–300 units |
| 3 kW | ₹1,70,000–₹2,10,000 | ₹92,000–₹1,32,000 | 390–450 units |
| 5 kW | ₹2,70,000–₹3,30,000 | ₹1,92,000–₹2,52,000 | 650–750 units |
MSEDCL Net Metering in Mumbai
- Apply online at mahadiscom.in after installation
- MSEDCL inspection within 30 days
- Bidirectional meter installation (at MSEDCL cost)
- Export rate: At consumption tariff rate
- Annual settlement of excess credits
Mumbai-Specific Considerations
- Monsoon (June–September): Generation drops 40–60% — factor into ROI calculation
- High-rise buildings: Society NOC required before installation
- Salt air (coastal areas): Use marine-grade mounting structures
- BEST areas (South Mumbai): Different process — apply to BEST, not MSEDCL
Documents Required for Mumbai Solar
- MSEDCL consumer number
- Latest electricity bill
- Property documents or society NOC
- Aadhaar + PAN card
- Bank account details
- Roof photos with dimensions
Payback Period in Mumbai
With electricity tariff at ₹8–₹12/unit for Mumbai residential consumers, a 3 kW system typically pays back in 4–5 years and saves ₹25,000–₹35,000 per year.