Solar + EV Synergy Calculator
See the combined savings of solar-charged EV vs grid + petrol in Queensland.
Your Setup
6.6kW
3kW15kW
8 kWh
3 kWh15 kWh
How much excess solar can your EV soak up during the day?
35 km
10 km100 km
$/L
8 L/100km
5 L/100km15 L/100km
Driving on sunshine
0.8c/km
vs 15.2c/km on petrol
100% of your EV charging from solar
Annual Savings vs Petrol
$1,840
Solar EV Annual Cost
$102
Three-Scenario Comparison
What this means
A solar-charged EV costs just 0.8c per kilometre — that's 19x cheaper than petrol at 15.2c/km. Over a year, you save $1,840 compared to a petrol car.
Next Step
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Frequently Asked Questions
Can solar panels charge an EV?
Yes — a typical 6.6kW solar system produces 20-35kWh per day. An EV driving 40km/day needs about 6-8kWh. So even a modest solar system can easily charge your EV with excess energy.
How many solar panels do I need to charge an EV?
For average driving (35km/day ≈ 5.5kWh), you need about 1.5-2kW of additional solar capacity. That's 4-5 panels. If you already have a 6.6kW system with excess production, you likely won't need any additional panels.
Is it better to export solar or charge my EV?
Almost always better to charge your EV. You're effectively replacing 30-42c/kWh grid electricity (or $1.90/L petrol equivalent) with solar that would otherwise earn just 5-9c/kWh as feed-in. The value of using solar for your EV is 4-8x higher than exporting it.