Why Your Tesla Is Charging Slowly (and When It's Normal)
A Tesla charging slowly is usually doing what its charger allows. A standard 120-volt outlet adds 2 to 3 miles of range an hour, a 240-volt outlet up to 30, and a Wall Connector up to 44, per Tesla's own home-charging page. At a Supercharger the rate falls as the battery fills, drops in the cold, and can drop again on sites where two stalls share one power cabinet. Here is every documented cause, the number that counts as normal for each, and the one setting that quietly caps your car.