Tesla Powerwall may prioritize Model 3 charging over home battery

Tesla homeowners have observed that the Powerwall battery system may prioritize charging a plugged-in Model 3 over filling the Powerwall itself when using solar energy. This behavior was highlighted in a Reddit discussion where a user with two Powerwall 3 units noted that their vehicle drew solar power before the home batteries reached full capacity, despite being set to ‘Self-Powered’ mode.

According to community discussions, this occurs because the system classifies the electric vehicle as a ‘Home’ load, causing the Powerwall to prioritize the car. To ensure the Powerwall charges first, users suggest increasing the Powerwall’s backup percentage or adjusting specific charging schedules and solar settings within the Tesla interface.