The rise of electric vehicles (EVs) is undeniable, and alternatives to fossil fuels have never been more important. Alongside the push for sustainability, economic considerations are also increasingly in focus—especially with fluctuating energy markets and fuel price uncertainties. One of the most promising solutions for EV charging is the use of solar energy.
But is it really worth it to charge your electric car with your own solar power? In this article, we take a detailed look at the possibilities, technical requirements, cost-effectiveness, common questions, and pitfalls.
The basics of solar EV charging
How does it work?
Solar panels generate direct current (DC), which is converted by an inverter into alternating current (AC). This AC is then delivered to the car battery via a home charger (wallbox). Some systems also support direct DC charging, but these are less common and more expensive.
What components are needed?
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Solar panels (PV)
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Inverter (ideally hybrid, to support battery storage later)
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Wallbox or EVSE (Electric Vehicle Supply Equipment)
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Energy management system (optional but highly recommended)
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Optional battery storage – if you want to charge at night
How much energy can be generated?
Solar conditions in Hungary
Hungary receives approximately 1000–1300 kWh/m² of solar energy annually. A 5 kWp system can generate around 5500–6500 kWh per year, which is enough for 25,000–30,000 km of driving if used solely for charging.
Example:
With a car consuming 15 kWh/100 km:
5500 kWh / 15 = approx. 36,000 km per year.
How much does a system cost?
| Component | Average cost (2025) |
|---|---|
| 5 kWp solar system | 2.5–3.5 million HUF |
| Wallbox + installation | 250,000–500,000 HUF |
| Battery (10 kWh) | 2–3 million HUF |
| Energy management unit | 200,000–500,000 HUF |
Total with battery: 5–7 million HUF
Without battery: 2.8–4 million HUF
Payback period and cost savings
1. Annual driving distance: 20,000 km
2. Average consumption: 17 kWh / 100 km → 3,400 kWh / year
3. Grid charging (e.g., 60 HUF/kWh): 204,000 HUF/year
4. Solar charging: essentially free (or 10–15 HUF/kWh with depreciation) → ~51,000 HUF/year
Annual savings: approx. 150,000 HUF
Payback without battery: approx. 8–10 years
Payback with battery: could take 12–15 years
Advantages
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Lower operating costs
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Energy independence
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Zero COâ‚‚ emissions during charging
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Increases property value
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State subsidies and tax benefits (subject to availability)
Disadvantages and challenges
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High initial investment
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Reduced energy production in winter – grid charging may be needed
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Requires technical knowledge or professional help
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Difficult in apartment buildings or shared properties
System types
On-grid system
Excess energy is fed back into the grid. Most efficient if charging occurs during the day.
Off-grid system
Independent of the grid; requires large battery capacity.
Hybrid system
Connected to the grid but includes battery storage for night charging.
Tips for effective solar EV charging
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Schedule charging during daylight – when solar production is highest.
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Use a smart wallbox – that adapts to PV production.
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Monitor and optimize consumption – with an energy management system.
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Use apps for control – like MyEnergi, SolarEdge, SMA.
FAQ – Frequently Asked Questions
Can I install this in an apartment building?
Not typically – generally requires a detached home.
Does it work in winter?
Yes, but with lower energy production. Grid charging may still be necessary.
What if I sell the car?
The solar system works with any EV – it’s not car-specific.
What’s the payback period?
Depends on usage, but generally 8–12 years.
Future trends
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Bidirectional charging (V2G, V2H) – the EV battery powers the home
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AI-based charging control systems
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Vehicle-integrated solar systems (e.g., Lightyear)
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Community solar sharing and apartment solutions
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Solar carports and EV charging stations
Solar charging is not only eco-friendly but can also be economically viable in the long term—especially for homeowners who drive frequently. While the initial investment can be significant, the energy independence and long-term savings make it a worthwhile choice. It’s also a meaningful step toward a cleaner future.