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
What hasn’t been said so far is that most (all?) new internal combustion engine cars can choose to excite the alternator while braking, and de-excite while accelerating or coasting. This way, if the battery has a high enough charge, the alternator is only run while slowing down, using the kinetic energy you’re trying to get rid off anyway.
In this regard the charging would truly be free since it uses the energy that would otherwise be converted to heat in your brake discs.
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