Electric cars lose 1-2% charge parked overnight, increasing to 3-5% in cold temperatures.
Cold temperatures sap power from the battery. This happens because the charged ions in the battery leak energy into the battery’s electrolyte liquid.
The reality is that leaving your electric car parked overnight is not a problem even in sub-zero temperatures, so long as you park up with enough charge, to begin with.
If you are leaving your electric car parked up for a week, make sure it has at least 70% battery. For two weeks, make sure it has at least 80% battery.
EV manufacturers don’t recommend leaving your car charged at 100% because it degrades the battery, although if you only intend to keep the car for a few years, it isn’t a problem.
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