Given an on-the-grid, non-solar house, is it more energy efficient to charge your phone in your house or in your car? If there would be a difference for gas-powered and electric vehicles, please explain that as well.
In: Technology
Usually the house, because introducing another battery in the middle is inefficient as some energy will be lost to heat and battery degradation. However, it is common for electric car owners to sign up to an electricity contract where power is cheaper at night, and the car will usually be set to do its regular charge on cheap power. So if you wanted to charge your phone at a peak time it might be cheaper to go and take power from the car battery.
In practice the amount of energy is so small it makes no difference to anything.
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