How many solar panels do you need to charge an EV?

How many solar panels do you need to charge an EV?

This will depend on the following factors:
1) how much electricity your car will use annually 
2) the wattage of the solar panels you are planning to install
3) how well solar panels produce electricity where you live. 
For the average Australian driver who drives around 50km per day, an electric car will need about 8kWh of electricity to recharge what they use. 1kW of solar capacity (around 4 panels) will produce, on average per day over a year, 4kWh of electricity – less in the winter, and more in the summer. 

This means you’d need to add around 2kW of solar panels to your roof to offset the charging of an electric car that is driven ~50km per day.

If you wanted to fully charge your EV overnight (such as a Nissan Leaf), when you got home from work, you would need to install 40kWh of battery storage as well.

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