Delhi is moving fast towards a clean energy future. With rising electricity bills, frequent power cuts, and the increasing popularity of electric vehicles (EVs), many homeowners are asking:
👉 “How many solar panels do I need to power my home and charge my EV in Delhi?”
The answer depends on your home’s electricity consumption, the EV charging needs, available roof space, and the efficiency of solar panels.
This blog will give you a clear estimate of:
- Average energy needs of a Delhi home
- How much electricity an EV charger consumes
- Solar system size required for both
- Number of solar panels needed
- Cost, space, and subsidy benefits
- FAQs for Delhi homeowners
🔹 Step 1: Calculate Average Electricity Consumption of a Delhi Home
On average, a middle-class family home in Delhi consumes 10–15 units (kWh) per day without AC and 15–25 units per day with 1–2 ACs.
Example (3–4 BHK home with appliances):
- Fans, lights, fridge, TV, washing machine = ~300–400 units/month
- ACs + kitchen appliances = ~400–500 units/month
- Total: ~700–900 units/month (~25–30 units/day)
So, a typical Delhi home uses ~9000–11,000 units/year.
Solar Panel Sizing Calculator for Delhi Homes + EV
| Daily Energy Use (Home + EV) | Monthly Units | Recommended System Size | No. of 330W Panels | No. of 450W Panels | Roof Space Needed |
|---|---|---|---|---|---|
| 15 units/day (small home, no EV) | ~450 units | 3 kW | 9–10 panels | 7 panels | 300 sq. ft. |
| 20 units/day (2–3 BHK, light EV use) | ~600 units | 4 kW | 12 panels | 9 panels | 400 sq. ft. |
| 25 units/day (3–4 BHK, no EV) | ~750 units | 5 kW | 15–16 panels | 11–12 panels | 500 sq. ft. |
| 30 units/day (3–4 BHK + EV charging) | ~900 units | 5.5–6 kW | 17–18 panels | 12–13 panels | 550–600 sq. ft. |
| 40 units/day (large home + 2 EVs) | ~1200 units | 8 kW | 24 panels | 17–18 panels | 800 sq. ft. |
✅ How to Use This Table:
- Check your average monthly electricity bill (units).
- Add your EV charging needs (~5 units/day per EV).
- Match with the closest system size.
- See the number of panels & roof space needed.
👉 Example:
- Family in Delhi with 25 units/day home + 5 units/day EV = 30 units/day.
- They need a 5.5–6 kW solar system = 12–13 monocrystalline (450W) panels.
Solar Sizing Calculator
Estimate how many solar panels you need for your Delhi home + EV.
🔹 Step 2: Electricity Requirement for an EV Charger in Delhi
Most EVs in India (Tata Nexon EV, MG ZS EV, BYD Atto 3) consume:
- ~0.15–0.20 kWh per km
- Annual driving = 10,000–12,000 km
- Total = ~2000 kWh/year (≈165 units/month)
👉 An EV in Delhi adds ~5–6 units/day extra load.
🔹 Step 3: Total Energy Requirement (Home + EV)
- Home: ~25 units/day
- EV charging: ~5 units/day
- Total = 30 units/day (≈900 units/month or 11,000 units/year)
🔹 Step 4: Solar System Size Required in Delhi
Delhi gets ~5.5 hours of effective sunlight/day.
Formula:
System Size (kW) = Daily Units ÷ Sun Hours
= 30 ÷ 5.5 ≈ 5.5 kW system
👉 To power both your home and EV charger, you’ll need a 5.5–6 kW solar system in Delhi.
🔹 Step 5: How Many Solar Panels Are Needed?
Solar panel output varies by type:
- Polycrystalline Panel (330W): ~15–17% efficiency
- Monocrystalline Panel (400W–550W): 18–22% efficiency
Calculation:
- 5.5 kW system with 330W panels:
5500 ÷ 330 ≈ 17 panels - 5.5 kW system with 450W panels:
5500 ÷ 450 ≈ 12–13 panels
👉 For Delhi rooftops, 12–17 panels are typically required.
🔹 Step 6: Roof Space Requirement
- 1 kW solar = ~100 sq. ft.
- 5.5 kW solar = ~550 sq. ft.
👉 You’ll need 500–600 sq. ft. of shadow-free rooftop space in Delhi.
🔹 Step 7: Cost of Solar Panels in Delhi (2025)
| System Size | Units/Day | Panels Needed | Avg. Cost (₹) | With Subsidy (₹) |
|---|---|---|---|---|
| 5 kW | 25–27 | 15–16 panels | ₹2.5–3.0 lakh | ₹1.8–2.3 lakh |
| 6 kW | 30–32 | 17–18 panels | ₹3.0–3.5 lakh | ₹2.2–2.7 lakh |
✅ Government offers 40% subsidy for up to 3 kW and 20% subsidy for 4–10 kW under the Rooftop Solar Scheme (Delhi).
🔹 Step 8: Net Metering & EV Benefits
- With net metering, extra solar power goes to the grid.
- Your EV charging can be timed with daytime solar generation, reducing grid dependence.
- Average Delhi EV charging cost on grid = ₹7–9/unit. With solar = ₹0/unit after payback.
🔹 Pros of Installing Solar in Delhi for Home + EV
✅ Save ₹1.2–1.5 lakh/year on electricity + EV charging
✅ 25-year panel lifespan ensures long-term savings
✅ Faster EV adoption with zero running cost
✅ Reduces pollution in Delhi NCR
✅ Subsidy lowers upfront cost
🔹 Cons / Challenges
❌ High initial investment (₹2.5–3.5 lakh)
❌ Requires 500–600 sq. ft. space
❌ Output drops during monsoon/winter
❌ Battery backup (if needed) increases cost
🔹 Case Study: Delhi Home with EV
- Family of 4 + Tata Nexon EV
- Monthly bill without solar: ₹8,000 (home) + ₹2,500 (EV charging) = ₹10,500
- With 6 kW solar system: ₹0–2,000/month only (grid charges, fixed charges)
- Annual savings: ~₹1,00,000+
- Payback: 3–5 years with subsidy
🔹 FAQs – Solar for Home + EV in Delhi
Q1: How many solar panels are needed to charge an EV daily in Delhi?
👉 A typical EV requires ~5 units/day. That’s 1.2 kW solar (≈3–4 panels of 400W).
Q2: Can solar panels run AC + EV charging together?
👉 Yes, with a properly sized 5.5–6 kW system, both can run easily.
Q3: What is the lifespan of solar panels in Delhi?
👉 25–30 years with ~0.5% annual degradation.
Q4: Is battery backup necessary?
👉 No, unless you want night-time EV charging without grid. Net metering is enough for most homes.
Q5: How much subsidy can I get in Delhi?
👉 40% subsidy on up to 3 kW, and 20% for 4–10 kW under Delhi’s rooftop solar scheme.
Q6: Can solar panels fully charge my EV at night?
👉 No, unless you install a battery backup system. Solar works only in daylight.
Q7: Do EV chargers need a separate solar system?
👉 Not always. A single system sized for home + EV is more cost-effective.
Q8: Which solar panels are best for EV charging?
👉 High-efficiency monocrystalline (400W–550W) panels are ideal.
🔹 Conclusion
To power your entire home in Delhi with an EV charger, you’ll need a 5.5–6 kW solar system.
👉 That equals 12–17 panels depending on wattage, costing ₹2.5–3.5 lakh before subsidy.
👉 With government incentives and net metering, your payback period is just 3–5 years.
🌞 After that, both your home electricity and EV charging will be nearly free for 20+ years.
If you live in Delhi and want energy independence + pollution-free driving, investing in solar with an EV charger is one of the smartest financial and environmental choices in 2025.
