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Power Harmonics due to Tesla Charging

jaanton

Roadster NA #1026
Jun 25, 2010
337
14
Oakland, CA
Does anyone have any figures for production of harmonics in power lines due to charging electric vehicles and specifically the Tesla? I'm thinking that there is essentially a high current SMPS involved but when charging off a 240v supply the neutral conductor should have little to no current. But that's the trick. Similarly if you are charging off 120v @ 15A the neutral must be involved. Unlike a computer where only a small portion of the power capacity is being used, the EV will want to use nearly all the power capacity.
 

Alfred

Member
Supporting Member
May 28, 2009
300
259
Zurich
Does anyone have any figures for production of harmonics in power lines due to charging electric vehicles and specifically the Tesla? I'm thinking that there is essentially a high current SMPS involved but when charging off a 240v supply the neutral conductor should have little to no current. But that's the trick. Similarly if you are charging off 120v @ 15A the neutral must be involved. Unlike a computer where only a small portion of the power capacity is being used, the EV will want to use nearly all the power capacity.

The type of load matters. The supply essentially sees high power rectifier circuitry and not a motor with much non-resistive load. To be sure you should probably make a measurement.
P.S. In Europe the load is always from phase to neutral, usually L1 (around 230V).
 

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