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Electrical Load Calculation and Charger De-rating

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Electrician Installs a 24 AMP Tesla Charger in Customer’s Home, Would you get an EV? #electrician

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What happens here

The presenter further elaborates on the electrical considerations, emphasizing the importance of 'load calculation.' He states that Tesla Wall Connectors are capable of charging anywhere from 12 to 48 Amps, but due to the home's specific electrical infrastructure (a 100 Amp panel in a townhome), the charger had to be 'de-rated' to 24 Amps. This decision is based on professional load calculations to ensure the electrical system is not overloaded.

Goal: Understand and apply load calculations to safely de-rate the EV charger.

Tools and materials

  • Electrical Panel — The source of power for the charger, dictating the load limit
  • Tesla Wall Connector Tesla — The charging unit that needs to be configured based on load calculations

What they say

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All right, so we just installed a Tesla wall connector 24 amp. You might be asking, why is it 24 amps? We're currently in a town home in East Brunswick. During the installation, 100 amp panel over there. There is certain limitations when you install these chargers and we had to derate the charger down because of the load calculation. So, as you can see, we ran 1/2 in conduit all down nice and low entow

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