Electrical capacity is the maximum power the service panel can supply at one time ... large appliance to your electrical system without upgrading the panel, you need to calculate the load your current ...

To calculate the rough estimate of a solar panel’s daily watt-hour output, multiply its power in watts by the average hours of direct sunlight.

You can harness the power of the sun's rays to charge your electric vehicle. Here's how many solar panels you'll need to do it.