India is living through two energy revolutions at once — rooftop solar and electric vehicles (EVs). The big question every EV owner is asking: “Can I charge my car from solar and pay zero electricity bills?” The answer is yes, and here’s exactly how to make it work.
Why Solar + EV Is a Perfect Match
Solar panels generate free electricity during the day. Your EV is essentially a battery on wheels that needs charging. Put the two together and you eliminate both your electricity bill and your fuel cost. In India, with rising petrol prices and growing EV adoption, this combination has never made more financial sense.
| Charging Method | Monthly Cost (1,000 km) |
| Petrol car | ₹6,000 – ₹8,000 |
| EV charged from grid | ₹1,200 – ₹2,000 |
| EV charged from solar | ₹0 – ₹200 |
| Annual savings (solar EV vs petrol) | ₹70,000 – ₹95,000 |
Read more on how solar saves money: Residential Solar Rooftop by iSolarLite
How Much Solar Do You Actually Need?
The extra solar capacity you need depends on your EV and daily driving distance. Here’s a quick guide:
| EV Type | Extra Solar Capacity Needed |
| Electric scooter (Ola S1, Ather 450X) | 1 – 2 kW |
| Compact EV car (Tata Tiago EV) | 3 – 4 kW |
| Mid-size EV (Nexon EV, MG ZS EV) | 4 – 6 kW |
| Quick Formula
Daily EV energy = (Daily km ÷ 100) × EV efficiency Example: 40 km/day ÷ 100 × 15 kWh = 6 kWh/day → needs ~1.5 kW extra solar |
Not sure about your current system’s capacity? Try the iSolarLite Solar Savings Calculator for a free estimate.
Costs, Subsidies & Payback ,The Real Numbers
A 6 kW solar system covering both home electricity and EV charging costs ₹2.8L – ₹3.8L after the PM Surya Ghar subsidy (up to ₹1.08L off for systems above 3 kW). Add a Level 2 wallbox charger for ₹25,000 – ₹50,000 and you’re fully set up.
- Monthly savings on electricity + fuel: ₹4,700 – ₹7,500
- Payback period: 5 – 4.5 years
- System lifespan: 25+ years of free energy
The PM Surya Ghar Muft Bijli Yojana subsidy and FAME II EV scheme can both be claimed together, cutting your upfront cost significantly.
3 Things to Get Right Before You Start
- Charge during the day. Solar output peaks between 10 AM – 3 PM. Schedule EV charging in this window for maximum free power.
- Use net metering. Excess solar power credits your bill — so even if you charge at night from the grid, you’re offsetting it with daytime solar export.
- Consider BESS for night charging. A battery storage system lets you store solar energy and charge your EV overnight without touching the grid. See our guide on BESS for Commercial & Home Solar.
Which EV Charger Works Best with Solar?
Not all chargers integrate with solar the same way. Here’s what you need to know before buying:
| Charger Type | Solar Compatibility |
| Level 1 – 3.3 kW (standard plug) | Basic — works well for scooters & overnight BESS charging |
| Level 2 – 7.2 kW AC wallbox | Best — direct solar charging during peak hours (10 AM–3 PM) |
| DC Fast Charger – 50 kW+ | Not suited for home solar — demand too high |
| 💡 Pro Tip
Ask your installer about EV-ready hybrid inverters. These automatically detect solar surplus and divert it to your EV charger first — so not a single unit of free electricity goes to waste. |
Frequently Asked Questions
Can I charge my EV during a power cut using solar?
Only if you have a hybrid inverter with battery storage (BESS). A standard grid-tied solar system shuts down during outages for safety. With BESS, your solar + battery system keeps running independently. Read more: BESS for Solar India.
Will my existing solar system handle EV charging?
It depends on your current system size and daily consumption. Many households with a 5–6 kW setup can add EV charging with little or no upgrade. Use our Solar Savings Calculator to check, or get a free site assessment.
Does charging an EV reduce my solar system’s life?
No. Adding EV load does not affect your solar panels or inverter lifespan. The only consideration is ensuring your inverter and electrical panel are rated for the combined load — which a good EPC installer will verify during design.
What if my EV needs more power than my solar produces on a cloudy day?
Net metering takes care of this automatically. On sunny days, your system exports surplus power to the grid and earns credits. On cloudy days, you draw from the grid against those credits — effectively at zero cost. For full independence, add a BESS battery.
Ready to Go Solar + EV?
iSolarLite has been installing rooftop solar across Mumbai and Navi Mumbai since 2012. We’ll design the right system for your home and EV — and handle subsidy paperwork, installation, and maintenance end to end. Get your free solar assessment today →
