India added over 1.5 million electric two-wheelers and 100,000 electric four-wheelers in 2025 alone, according to Mercom India. If you already have rooftop solar — or are planning it — adding a home EV charger to the same system is one of the smartest investments you can make. Charging your car on surplus solar power can cut your per-km fuel cost to near zero.
The good news: connecting an EV charger (also called an Electric Vehicle Supply Equipment, or EVSE) to an existing rooftop solar system is technically straightforward. The tricky part is sizing the inverter correctly, managing simultaneous loads, and ensuring DISCOM compliance with the modified net metering setup.
Key takeaway. A home EV charger (3.3 kW AC Level 2) added to a 5 kW+ solar system in India can charge a standard electric car overnight using daytime grid-exported credits — or charge directly from solar during peak generation hours. Heaven Green Energy integrates BIS-certified EVSE units with your solar inverter and DISCOM net meter to ensure a seamless, code-compliant setup for 2026.
What Type of EV Charger Works Best with Rooftop Solar
Home EV chargers come in three types. The type you choose determines how well your solar system integrates.
Type 1 — Portable 15A plug-in charger (Level 1, ~1.5–2.2 kW): These plug into a standard 15A socket. Slow — charges a 40 kWh EV in 18–25 hours. Works with any solar system with zero modification. Fine for two-wheelers or plug-in hybrids with small batteries. Not recommended for four-wheelers if you drive daily.
Type 2 — Hardwired AC Level 2 charger (3.3–7.4 kW): The standard for home EV charging in India in 2026. Charges a 40 kWh EV in 5–12 hours. Requires a dedicated 16A or 32A circuit from your distribution board. Works naturally with on-grid solar when sized correctly. Most popular choice for i20 Electric, Nexon EV, Tata Tiago EV owners.
Type 3 — DC fast charger (15–50 kW+): Commercial-grade. Not suitable for residential solar integration — the load would exceed most home solar systems and require a three-phase supply upgrade.
For the vast majority of Indian homeowners with EV + solar, a 3.3 kW or 7.4 kW AC Level 2 charger is the right choice.
💡 Fast tip
If you're buying an EV charger unit, look for BIS IS 17017 certification and EVSE compliance with AIS 138 (Part 1) standard — the Central Motor Vehicles Rules 2015 amendment makes this mandatory for home chargers connected to permanent wiring.
How Solar and EV Charging Work Together
Understanding the energy flow prevents expensive mistakes in sizing and wiring.
During peak solar hours (9 am – 4 pm): Your solar array generates more power than your home appliances consume. This surplus used to flow back to the grid. With an EV charger, you can divert this surplus to charge your car’s battery instead — reducing grid export and maximising self-consumption. Self-consumed solar power has an effective value of ₹6–₹10/unit (your avoided grid purchase rate), compared to the ₹2–₹3/unit net metering export credit most DISCOMs pay.
During off-peak and night hours: Your EV charger draws from the grid. If your DISCOM has a Time-of-Day (ToD) tariff with cheaper night rates, this is when you should schedule charging. Most modern EVSE units and solar inverters (especially Sungrow and Huawei models) support scheduled charging timers.
The net effect: A 3 kW solar system generating 360 kWh/month, with an EV consuming 120 kWh/month for charging, means roughly 30–40% of your EV charging comes from free solar power. For a car traveling 1,500 km/month at 15 kWh/100km, you save ₹700–₹1,200/month in electricity costs on top of the solar bill savings.
| Charging Scenario | Energy Source | Effective Cost/Unit | Monthly EV Cost |
|---|---|---|---|
| Night charging (grid only) | Grid | ₹6–₹8/unit | ₹720–₹960 |
| Day charging from solar surplus | Solar | ₹0 (sunk cost) | ₹0–₹200 |
| Mixed smart charging | Solar + grid | ₹2–₹4/unit | ₹240–₹480 |
| Net metering credits used at night | Grid offset | ₹2–₹3/unit credit | ₹360–₹600 |
Assumes 120 kWh/month EV consumption. Grid rates per CEA tariff data, 2026.
Sizing Your Solar System to Add EV Charging
If you are designing a new solar system and want to include EV charging, you need to add the EV load to your household load calculation.
How to size for EV + home:
Total system kW = (Home daily kWh + EV daily kWh) ÷ Peak sun hours × 1.2
Example — Ahmedabad, 3BHK + Tata Nexon EV (30 kWh usable battery, charging 80% = 24 kWh every other day = 12 kWh/day average):
- Home daily: 16 kWh
- EV daily: 12 kWh
- Total: 28 kWh
- Peak sun hours: 5.5
- Base kW: 28 ÷ 5.5 = 5.09 kW
- With buffer: 5.09 × 1.2 = 6.1 kW → install 6 kW system
This means a homeowner who previously needed only a 3 kW system for their home should consider upgrading to 6 kW when adding an EV. The additional 3 kW adds roughly ₹90,000–₹1,10,000 to system cost but pays back through near-free EV charging.
Step-by-Step: How to Add an EV Charger to Your Solar System
This is the installation sequence Heaven Green Energy follows for EV charger integration with an existing or new solar setup.
- Assess existing solar system capacity — check inverter rated output, current average daily generation, and available roof space for panel expansion if needed.
- Upgrade inverter if needed — if your current inverter is undersized for the combined EV + home load, upgrade to a larger unit or add a second string inverter.
- Install a dedicated EVSE circuit — run a 6 mm² copper cable from your main distribution board (DB) to the EV parking area. Install a 32A MCB (miniature circuit breaker) dedicated to the EVSE.
- Mount the EVSE unit — wall-mount the Level 2 charger unit in a weatherproof location near the parking spot. Ensure IP55 or higher ingress protection for outdoor mounting.
- Connect EV management to solar inverter — if your inverter supports smart home energy management (HEMS), configure the EV charger as a controlled load. Sungrow’s iSolarCloud and Huawei’s FusionHome platforms both support this directly.
- Update DISCOM net metering — notify your DISCOM of the change in consumption pattern. In most states, no formal re-approval is needed unless you are also expanding the solar system capacity.
- Test and configure charging schedule — set daytime solar-priority charging (9 am–4 pm) and optional night-rate fallback charging.
Get a free EV + solar integration assessment. Our engineers visit within 24 hours and send a complete cost and savings proposal. Get your free quote →
DISCOM and Regulatory Considerations
Adding an EV charger to a grid-tied solar system raises a few regulatory questions that are worth addressing upfront.
Does adding an EV charger require a new net metering application? Generally no — if you are keeping the same solar system size, the existing net metering agreement continues. The EV charger simply changes your import-export pattern.
Does increasing solar system size require re-application? Yes. If you are expanding from, say, 3 kW to 6 kW to accommodate EV charging, you must file a new PM Suryaghar application and obtain revised DISCOM feasibility approval. The solar permits and net metering guide for Gujarat covers the re-application process.
Three-phase upgrade: A 7.4 kW Level 2 charger on single-phase supply requires your sanctioned load to be at least 10 kW. Many 3BHK homes have single-phase connections with 5–8 kW sanctioned loads. You may need to upgrade to three-phase supply (which costs ₹15,000–₹25,000 in Gujarat) before installing a 7.4 kW charger.
📘 Regulation note
As of April 2026, the Central Electricity Authority (CEA) Draft Regulations on EV Charging Infrastructure permit home EV chargers to be connected to the same net metering setup as rooftop solar without requiring a separate metering arrangement, provided total connected load does not exceed the sanctioned load. See the CEA portal for the latest notification.
Pros and Cons of Solar + EV Charging Integration
- EV running cost drops to ₹0–₹2/km from solar power
- Higher solar self-consumption — more value from each unit generated
- Single rooftop install covers both home and transport needs
- Smart inverters auto-prioritise solar for EV charging
- Combined payback on solar + EVSE typically under 5 years
- May need solar system upgrade, adding ₹90,000–₹1.5 lakh
- Direct solar charging only possible during daytime hours
- 7.4 kW EVSE may require three-phase supply upgrade
- EVSE unit cost adds ₹15,000–₹40,000 to the project
The Solar-EV Self-Consumption Optimisation Method
The key to getting the most out of a combined solar + EV setup is managing when you charge. We call this the Heaven Green Solar-EV Charging Window Method — a simple scheduling approach that maximises free solar charging.
The three-window approach:
- Solar priority window (9 am–4 pm): Set your EV charger to charge during these hours whenever you’re home. Even if you only top up 10–20 kWh, that’s direct free energy from your panels.
- Evening storage window (if hybrid system): If you have battery storage, your home battery charges during peak solar and can trickle-charge your EV in the evening without touching the grid.
- Night-rate fallback (if ToD tariff available): Schedule grid charging for 11 pm–5 am if your DISCOM offers cheaper night rates. UGVCL and DGVCL in Gujarat have begun piloting ToD tariffs for metered consumers as of 2025.
Most modern EVSE units (Lectrix, Statiq Home, Tata Power EZ Charge) support scheduling via mobile app. Paired with a smart inverter, this sequence requires zero daily manual intervention.
How Heaven Green Energy Handles Solar + EV Integration
Our engineering team has completed solar + EV charger integrations across residential projects in Ahmedabad, Surat, and Rajkot. We supply, install, and commission both the solar system and the EVSE unit, ensuring:
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BIS and AIS 138 compliant EVSE units
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Correct circuit sizing and earthing per IS 732 (Code of Practice for Electrical Wiring Installations)
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DISCOM documentation if system size is being revised
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Smart charging configuration linked to your solar inverter’s monitoring platform
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Residential Solar — on-grid and hybrid systems sized to include EV charging load.
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Solar Calculator — see your combined home + EV solar savings estimate.
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Products: Solar Inverters — smart inverters that support EVSE load management.
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Contact our team — free EV + solar integration consultation.
Frequently Asked Questions
Can I charge my EV directly from solar panels?
Yes, but not directly — EV chargers draw AC power, and solar panels produce DC. Your solar inverter converts DC to AC, and the EVSE then charges the car’s battery. During peak solar hours, the inverter prioritises your home loads first and routes surplus solar power to the EV charger. If the solar surplus is less than the charger’s minimum draw, the system tops up from the grid automatically.
How much extra solar capacity do I need to add EV charging?
For an average electric car travelling 1,500 km/month at 15 kWh/100 km, you’ll consume about 225 kWh/month for charging. That requires an additional 2–2.5 kW of solar capacity in most Indian cities. So a home that previously needed 3 kW would need 5–5.5 kW after adding an EV. Use our solar calculator for a precise estimate.
What is the cost of a home EV charger in India?
A Level 2 home EVSE unit (3.3 kW, wall-mounted, with basic smart features) costs ₹15,000–₹25,000 in 2026. Premium units with solar-aware smart charging and app connectivity cost ₹30,000–₹45,000. Installation (wiring, MCB, earthing) adds ₹5,000–₹12,000. Total project cost for EVSE integration with an existing solar setup: ₹20,000–₹55,000.
Does adding an EV charger affect my net metering agreement?
Usually not, if you are keeping the same solar system size. The net metering agreement covers the solar generation and export — the EV charger is just another home load on the import side. If you are expanding your solar system to accommodate EV charging, you’ll need a revised DISCOM feasibility approval and an updated net metering connection.
Which solar inverters support smart EV charging in India?
Sungrow’s SH series hybrid inverters support EV load management via the iSolarCloud app. Huawei’s SUN2000 series with FusionHome integrates with compatible EVSE units. Goodwe and Growatt also offer HEMS (Home Energy Management System) features in their premium models. Pure string inverters without HEMS functionality can still charge EVs but without smart scheduling from the inverter side.
Is there a subsidy for home EV chargers in India?
As of 2026, there is no direct central subsidy for home EV chargers under FAME II or PM E-Drive specifically. However, several state governments (including Maharashtra and Karnataka) offer partial reimbursements for home EVSE installations under their EV policies. Check your state’s EV policy notifications for current benefits.
