Are you planning to power your Delhi home with solar panels and also charge your electric vehicle (EV) from clean energy? Then you must be asking: How many solar panels do I really need?
This is where a Solar Panel Sizing Calculator for Delhi Homes + EV comes in handy. By using your daily electricity consumption, EV charging needs, and Delhi’s average sunlight hours, you can calculate the ideal solar system size, number of panels, and roof space required.
In this guide, we’ll explain:
- How the calculator works
- Average solar panel requirements for Delhi homes
- Factors affecting solar sizing with EV charging
- Cost estimation and subsidies in Delhi
- FAQs on solar panel sizing
Why a Solar Panel Sizing Calculator is Important for Delhi Homes + EV
Delhi receives about 5.5 sunlight hours per day on average, making it one of the best cities in India for solar adoption. But every home’s energy use is different:
- A 2 BHK family may use around 15–20 units/day.
- A 3–4 BHK home may use 25–30 units/day.
- An EV charger adds 5–10 units/day per car, depending on usage.
If you install fewer panels than required, you will still depend on the grid. If you install too many, your investment may take longer to recover. That’s why a calculator gives you the sweet spot between savings, cost, and efficiency.
Solar Sizing Calculator
Estimate how many solar panels you need for your Delhi home + EV.
How the Solar Panel Sizing Calculator Works
The calculator uses this formula:
System Size (kW) = Daily Energy Requirement ÷ Sunlight Hours
Example:
- Home use: 25 units/day
- EV charging: 5 units/day
- Total: 30 units/day
- Sunlight in Delhi: 5.5 hrs/day
So, System Size = 30 ÷ 5.5 ≈ 5.5 kW
Number of panels depends on panel wattage:
- 330W panels → 17 panels
- 450W panels → 12–13 panels
- 550W panels → 10 panels
Roof space requirement: ~100 sq. ft. per kW
So, 5.5 kW = 550 sq. ft.
Solar Panel Requirement Table for Delhi Homes + EV
| Daily Use (Home + EV) | System Size | 330W Panels | 450W Panels | Roof Space (sq. ft.) |
|---|---|---|---|---|
| 15 units/day | 3 kW | 9–10 | 7 | 300 |
| 20 units/day | 4 kW | 12 | 9 | 400 |
| 25 units/day | 5 kW | 15–16 | 11–12 | 500 |
| 30 units/day | 5.5–6 kW | 17–18 | 12–13 | 550–600 |
| 40 units/day | 8 kW | 24 | 17–18 | 800 |
Factors Affecting Solar Panel Sizing in Delhi
- Electricity Consumption – Higher AC usage in summers increases daily units.
- EV Charging – A small EV may need 5 kWh/day, while larger EVs may need 8–10 kWh/day.
- Panel Efficiency – Monocrystalline panels are more efficient, reducing panel count.
- Roof Space – Limited shadow-free space can affect the panel layout.
- Subsidy and Net Metering – In Delhi, residential solar users can benefit from subsidies under the PM Surya Ghar Muft Bijli Yojana and net metering for exporting extra power.
Cost of Installing Solar in Delhi (with EV Charger)
- 3 kW system: ₹1.5–1.7 lakh (good for small homes without EV)
- 5 kW system: ₹2.5–2.8 lakh (3 BHK or 1 EV charging)
- 8 kW system: ₹4.5–5 lakh (large homes + 2 EVs)
Subsidy benefit (2025):
- Up to ₹78,000 for residential homes under central scheme.
- Net metering allows savings of ₹8–10 per unit.
Benefits of Using the Calculator
✅ Get a clear estimate of panels required
✅ Avoid over-investment or under-sizing
✅ Plan your EV charging from solar
✅ Estimate roof space before installation
✅ Calculate long-term savings on electricity bills
FAQs on Solar Panel Sizing Calculator for Delhi Homes + EV
Q1. How many solar panels do I need for a 3 BHK house with 1 EV in Delhi?
A 3 BHK uses ~25 units/day, plus 5 units for EV = 30 units/day. You need a 5.5–6 kW system, which is 12–13 panels of 450W.
Q2. Can I charge my EV fully with solar panels in Delhi?
Yes. A 5–6 kW system can generate 25–30 units/day, enough to power your home and charge a small EV daily.
Q3. How much roof space is required for 5 kW solar panels?
About 500 sq. ft. of shadow-free roof.
Q4. Which solar panels are best for EV charging?
High-efficiency monocrystalline panels (450W–550W) are recommended to reduce panel count and space requirement.
Q5. Do I need batteries for EV charging from solar?
Not necessarily. With net metering, you can export excess daytime solar and import at night when EV charging happens. Batteries are optional.
Q6. What is the cost of a 5 kW solar system in Delhi?
Around ₹2.5–2.8 lakh before subsidy. After subsidy, cost may reduce to ₹1.8–2.0 lakh.
Conclusion
With the rise of EVs in Delhi, solar power is the smartest way to reduce electricity bills and fuel costs together. Using a Solar Panel Sizing Calculator for Delhi Homes + EV, you can easily estimate:
- How many panels you need
- System size in kW
- Roof space requirement
- Cost and savings potential
If you are planning to go solar in 2025, start with a 5–6 kW system for a medium home and one EV. This setup will power your appliances, ACs, and daily EV charging—while giving you clean, sustainable, and cost-saving energy for years to come.