Tesla sent an alert to customers’ in-car screens advising them to avoid charging their vehicles from 3PM–8PM. “A heat wave is expected to impact the grid in Texas over the next few days,” the alert reads, according to Electrek. “The grid operator recommends to avoid charging during peak hours between 3pm and 8pm, if possible, to help statewide efforts to manage demand.”
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Keeping an EV unplugged during peak times can help Texas’ grid avoid blackouts. Triple-digit temperatures typically place more pressure on electrical systems as customers are more likely to blast their air conditioners. The heat dome fueling the heatwave is also depriving Texas of its wind power, which typically generates about a quarter of its electricity.