EV Home Charging & Solar ROI Calculator
Calculate your electric vehicle charging costs, solar panel requirements, and return on investment. Our data-driven, engineering-based calculator helps homeowners make informed decisions about EV ownership and solar installation.
Multi-country support • Local rates editable • No sign-up required
EV Charging Cost
Calculate home charging costs, monthly & annual savings vs gasoline
Solar Panel Sizing
Panel sizing, payback period, and long-term ROI analysis
Why Calculate Your EV & Solar ROI?
Significant fuel savings
EVs typically cost 50-70% less to fuel than gasoline vehicles
Solar payback in 6-12 years
Varies by location and incentives — offset your electricity costs
Accurate, data-driven calculations
Real EV efficiency data from manufacturer specs
Localized to your country
Electricity rates, gas prices, and sun hours pre-configured by region
How Our Calculator Works
EV Charging Cost
We calculate your daily, monthly, and annual charging costs based on your driving distance, EV efficiency (Wh/km or Wh/mile), and local electricity rates. Compare directly with gasoline costs.
Solar Panel Sizing
Determine how many solar panels you need to offset your EV charging or home electricity usage. We factor in your location's average sun hours and panel efficiency.
Combined ROI
See the complete picture: EV + Solar + Home Charger. Calculate your break-even point and 10-year net savings including maintenance savings and all investments.
Frequently Asked Questions
How accurate are the EV charging cost calculations?
Our calculations use manufacturer-specified efficiency ratings (Wh/km) for each EV model. Actual costs may vary ±10-15% based on driving style, climate, and charging habits.
What data sources do you use?
We use manufacturer specifications, international testing standards, regional utility averages, and global solar resource databases (such as NREL and PVGIS). Local user inputs are always prioritized.
Can I customize the electricity rates and gas prices?
Yes! Visit the Settings page to customize your location, currency, electricity rate, gas price, and other parameters to match your actual costs.
Not sure where to start?
Try the Combined ROI CalculatorNo sign-up required • No personal data stored