Dr Parwal’s solar story: 12 kW rooftop solar in Janakpuri, New Delhi
Dr Parwal's thoughts in the beginning: “I had been thinking about getting solar but couldn't find someone earlier. Recently my kids moved back from abroad so I thought this was the right time to get solar”
A quick, visual story of how one family reduced their electricity bill with rooftop solar.
- Name: Dr Kamal Kishore Parwal
- Family: ~7 members
- Location: Janakpuri, New Delhi
- System Installed: 12 kW
- Installation Month: 3rd September 2025
Planning snapshots
Post implementation snapshot
Solar bill snapshot**
💡 Why they chose solar
- High seasonal bills
- Wanted to adopt solar for a long time however couldn't find a reliable provider
- Long-term savings & clean energy
⚙️ System overview (super simple)
| Item | Details |
|---|---|
| Size | 12 kW |
| Panels | VaySolar approved |
| Inverter | VaySolar approved |
| Expected Generation | 19,000 units per year |
📉 First month bill math (Simple & transparent)
After solar
- Solar units generated: 2,365 units (2 months)
- Solar units consumed: 429 units (2,365 generated - 1,936 exported)
-
Units drawn from grid: 1,164 units
-
Total units consumed: 1,593 units (1,164 from grid + 429 from solar)
- Net units consumed: -772 units carried forward (1,593 - 2,365)
- Bill amount: ₹ 0 (since net consumption is negative)
Paid** ₹ 0 per unit
Without solar, he would have paid electricity bills at Rs 15 per unit for 1,593 units i.e. ₹ 23000+