Electric car batteries are large and to charge them in a reasonably short time overnight or during the day, your electrical system has to be ready for a continuous drain of around 50 AMPS. Which requires at least a 200AMP service with a 200AMP electrical panel.
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Electric Cars and Charging
Electrical Panel change can significantly improve the safety of your home, add more space for new circuits commonly added during renovations and simplify the electrical of your house.