Electric Vehicle Geek tracked Tesla Wall Connector firmware updates to gain a deeper understanding of how Tesla maintains and evolves its EV chargers (Tesla Gen 3 and Universal Wall Connector). These updates often roll out quietly but play a critical role in overall charging performance.
Tesla Wall Connectors receive regular firmware updates that enhance charging reliability, improve safety logic, maintain network stability, and ensure vehicle compatibility. While Tesla rarely publishes detailed change logs, firmware version distribution reveals how updates are prioritized and deployed in the real world.
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What Is the Latest Tesla Wall Connector Firmware We’re Running?
On our Tesla Wall Connector, the latest firmware currently installed is version 25.42.2. This update was pushed automatically over Wi-Fi in December 2025, with no option for manual intervention. We did not initiate the update; it arrived as part of Tesla’s standard OTA rollout.
Note: Tesla does not release firmware globally at once. Even today, many Wall Connectors remain on older versions depending on location, Wi-Fi uptime, and Tesla’s rollout group assignment.
Tesla Wall Connector Firmware Versions
In this section, we analyze observed firmware versions across Tesla Gen 3 and Universal Wall Connectors.
| Firmware Version | Release Period | Observed Firmware Highlights |
|---|---|---|
| 25.42.2 | December 2025 | Critical hotfix resolving bug where Wall Connectors in Power Sharing groups ignored charging schedules and started charging immediately upon being plugged in. |
| 25.42.1 | November 2025 | Introduced scheduling bug fixed by 25.42.2. Improved synergy between Wall Connector and Powerwall 3, focused on solar-only charging logic. |
| 25.42.0 | October 2025 | Introduced a scheduling bug related to Powerwall integration and solar charging. |
| 25.34.1 | September 2025 | Introduced WPA3 Wi-Fi incompatibility on some Gen 3 units and intermittent “Red Ring” errors during scheduled start times |
| 25.34.0 | September 2025 | Introduced Wi-Fi issues and Red Ring errors |
| 25.26.1 | August 2025 | Improved third-party vehicle support with “Guaranteed Charge” integration; NEM performance improvements; early OCPP support code spotted. |
| 25.26.0 | July 2025 | Key improvements in third-party EV support and Net Energy Metering. |
| 25.18.0 | June 2025 | Introduced “Managed Charging” via Powerwall for precise charging output control matching utility rate plans. |
| 25.10.1 | May 2025 | Improved solar vs grid charging prioritization (“Opticaster”); fixed Tesla App auto-discovery issue during setup. |
| 25.10.0 | April 2025 | Solar/grid prioritization and setup discovery fixes |
| 25.2.2 | February 2025 | Stability release fixing “clicking” sound (contactor cycling) issue on some Gen 3 units when idle |
| 24.44.3 | February 2025 | Added WPA3 Wi-Fi support so you can keep strong network security without downgrading. Fixed the issue causing the charger to lose Wi-Fi exactly one hour after reboot. |
| 24.44.2 | January 2025 | Improved WPA3 stability and addressed network dropouts occurring after reboot. |
| 24.44.1 | January 2025 | Strengthened Wi-Fi connection reliability for WPA3 networks. |
| 24.44.0 | November 2024 | Initial release supporting WPA3 and fixing the one-hour disconnect problem after reboot. |
| 24.36.3 | October 2024 | Improved synchronization between the app and the charger, and accuracy of status reporting. |
| 24.36.2 | October 2024 | Made local monitoring more stable and Powerwall 3 integration smoother. |
| 24.36.1 | September 2024 | Fixed minor issues with local connection and Powerwall 3 compatibility. |
| 24.36.0 | September 2024 | Set up direct local communication between the charger and the phone, and improved Powerwall 3 connection reliability. |
| 24.28.3 | September 2024 | Adjusted solar charging settings so Powerwall charges better during outages and solar inverters don’t shut down too early. |
| 24.28.2 | Fine-tuned solar charging behavior for improved performance during grid interruptions. | |
| 24.28.1 | Continued improvements to solar charging thresholds for more efficient energy use. | |
| 24.28.0 | Initial update optimizing solar-based charging control. | |
| 24.20.1 | September 2024 | Fixed a Wi-Fi glitch on Gen 3 chargers where the unit showed as connected but wasn’t reachable by the app. Improved 2.4GHz signal handling. |
| 24.20.0 | June 2024 | Began improving Wi-Fi stability and signal interference management on Gen 3 chargers. |
| 24.12.52 | August 2024 | Added detailed diagnostics showing exact reasons for charging pauses (like “Vehicle Asleep”). Introduced prompts to use the Tesla One app for advanced settings. |
| 24.12.51 | April 2024 | Expanded diagnostic details and improved Tesla One app integration prompts. |
| 24.12.50 | April 2024 | Enhanced visibility of charging status and continued Tesla One app guidance. |
| 24.12.49 | April 2024 | Strengthened diagnostic reporting and encouraged users to switch to Tesla One for better control. |
| 24.12.48 | April 2024 | Improved backend stability, supporting diagnostics and app usability |
| 24.12.47 | April 2024 | Increased reliability of diagnostic data and app sync. |
| 24.12.46 | April 2024 | Optimized charger-to-app communication for smoother remote control. |
| 24.12.45 | April 2024 | Fixed minor bugs affecting diagnostic feedback and app notifications. |
| 24.12.44 | April 2024 | Further stabilized diagnostics and Tesla One app prompts for better user interaction. |
| 24.12.43 | March 2024 | Smoothed inconsistencies in diagnostic reports and app-charger communication. |
| 24.12.42 | March 2024 | Improved accuracy of charging status data accessible through diagnostics. |
| 24.12.41 | March 2024 | Minor bug fixes, enhancing diagnostics and app communication. |
| 24.12.40 | March 2024 | Minor fixes improving diagnostics stability and backend communication. |
| 24.12.39 | March 2024 | Polished diagnostic responsiveness and reduced status reporting errors. |
| 24.12.38 | March 2024 | Fine-tuned diagnostic data handling for smooth app integration. |
| 24.12.37 | March 2024 | Strengthened backend systems supporting diagnostics and notifications. |
| 24.12.36 | March 2024 | Ongoing maintenance, improving app control, and charger feedback. |
| 24.12.35 | March 2024 | Enhanced error handling and status transparency for advanced users. |
| 24.12.34 | March 2024 | Continued refinement of diagnostics and system stability. |
| 24.12.33 | March 2024 | Updated diagnostic processes to improve user awareness of charging state. |
| 24.12.32 | March 2024 | Minor bug fixes, enhancing diagnostics, and app communication. |
| 24.12.31 | March 2024 | Finalized diagnostic improvements for the 2024 firmware series to ensure a consistent user experience. |
| 24.12.30 | February 2024 | Ongoing maintenance, improving app control and charger feedback. |
| 23.44.0 | January 2024 | Launch firmware for the Universal Wall Connector with Magic Dock. Improved the physical latch behavior for the built-in J1772 adapter so it seats and releases more reliably. Also fixed a metering bug where small amounts of grid usage appeared in the app even when running fully on Powerwall. |
| 23.24.4 | November 2023 | Hotfix release that resolved charging handshake failures with Volkswagen ID.4 and some Hyundai models, which previously caused charging sessions to fault and stop after about two minutes. |
| 23.24.3 | August 2023 | Reduced compatibility issues introduced earlier in the 23.24 branch that affected certain non-Tesla EVs during initial charge negotiation. |
| 23.24.2 | August 2023 | Partial mitigation for vehicle handshake problems affecting ID.4 and select Hyundai models, though issues were not fully resolved until 23.24.4. |
| 23.24.1 | August 2023 | Early 23.24 release that introduced handshake instability with some third-party EVs, leading to short charging sessions and fault errors. |
| 23.20.0 | July 2023 | Added the core charging control logic required for Tesla’s Charge on Solar feature, allowing the Wall Connector to dynamically scale amperage based on available solar excess from Powerwall or Tesla Inverter systems. |
| 23.9.0 | October 2023 | Known as a stable fallback version. Frequently used by Tesla Support to recover units that became unstable or unresponsive after newer updates. |
| 23.8.2 | March 2023 | Widely regarded as a reliable baseline build. The last firmware commonly available for manual .bin installation via the local web interface before Tesla moved almost entirely to OTA updates. |
| 22.45.1 | January 2023 | Fixed an issue where charging would briefly stop and immediately restart, often triggered by small voltage swings from the grid. Also improved Powerwall communication in homes with multiple batteries to prevent timeouts during grid-to-battery transitions. |
| 22.41.2 | December 2022 | Resolved charging handshake failures affecting non-Tesla EVs, notably Audi e-tron and Polestar models, which previously would not initiate charging. Improved update reliability to reduce lockups during OTA installs. |
| 22.41.1 | November 2022 | Early fix targeting non-Tesla vehicle handshake problems and stability issues that could cause the unit to freeze during firmware updates. |
| 22.33.1 | October 2022 | Major Wi-Fi stability improvement. Prevented Gen 3 units from dropping off the network or stopping SSID broadcast, a common issue in earlier builds. Also reduced random entry into Commissioning Mode after setup. |
| 22.33.0 | September 2022 | Introduced core fixes for Wi-Fi reliability and corrected a bug that caused chargers to revert to Commissioning Mode without user action. |
| 22.24.5 | August 2022 | Refined thermal throttling behavior so charging current would not drop too aggressively when the handle or internal sensors detected mild heat, improving sustained high-amp charging in warm environments. |
| 22.23.0 | June 2022 | Initial update adjusting temperature sensor logic to prevent unnecessary amperage reductions during normal operation in hot garages. |
| 22.7.0 | April 2022 | Early support for Tesla App features like Charge Stats and My Home. Improved diagnostic LED behavior, helping electricians distinguish between grounding faults and thermal faults. |
| 22.3.3 | April 2022 | Expanded diagnostic reporting tied to specific LED patterns, reducing reliance on the solid red fault indicator and improving troubleshooting accuracy. |
| 21.36.6 | December 2021 | Added charging access control, allowing the Wall Connector to be locked to specific Tesla VINs or Tesla-only vehicles, important for outdoor installs. Fixed a handshake timeout where cars that had been asleep for over 24 hours would fail to start charging. Kept the internal Wi-Fi access point active longer, reducing the need to power-cycle the unit to access settings. |
| 21.36.5 | December 2021 | Rolled out charging access control and improved vehicle-to-charger communication reliability. Reduced failed charge starts caused by delayed vehicle wake-up. |
| 21.36.4 | November 2021 | Initial release of access control features, allowing owners to restrict charger use. Some handshake timing issues were still present and later refined in subsequent builds. |
| 21.29.2 | October 2021 | Improved Wi-Fi behavior on mesh networks such as Eero and Orbi by reducing node hopping, which previously caused frequent disconnects. Improved visibility of the setup SSID during commissioning. |
| 21.29.1 | October 2021 | Addressed instability on mesh Wi-Fi systems and fixed cases where the Wall Connector’s setup network would disappear too quickly during initial configuration. |
| 21.18.1 | September 2021 | Enabled Group Power Management for Gen 3 Wall Connectors, allowing up to 16 units to share a single circuit and dynamically balance load to avoid breaker trips. Widely installed via manual .bin upload due to slow OTA rollouts at the time. |
| 21.8.5 | September 2021 | Reduced false ground fault errors in homes with electrically noisy grounding systems. Helped prevent red-light errors caused by overly sensitive ground monitoring. |
| 21.2.4 | September 2021 | Introduced early diagnostic access through the /vitals API, allowing users to view internal temperature data. Fixed a reboot loop triggered by interference from nearby Wi-Fi and smart home devices. |
| 21.2.4A (0) | September 2021 | Minor revision focused on stability improvements and boot-loop prevention related to wireless interference during startup. |
Share Your Tesla Wall Connector Firmware Experience
If you’re reading this, we’d love to hear what firmware version your Tesla Wall Connector is currently running. Has a recent update fixed a charging issue, improved scheduling, or changed how your unit behaves with Wi-Fi, Power Sharing, or non-Tesla vehicles? Sometimes the smallest firmware changes make the biggest real-world difference.
If you’re running a version not listed here, or you’ve noticed new behavior that isn’t documented yet, please reach out. Community feedback is how many of these changes get surfaced before Tesla ever documents them.
You can email us directly at james@electricvehiclegeek.com or leave a comment below and let us know what firmware version you’re running and what you’re seeing in the field.
James Ndungu is a certified EV charger installer with over five years of experience in EVSE selection, permitting, and installation. He holds advanced credentials, including certification from the Electric Vehicle Infrastructure Training Program (EVITP) and specialized training in EV charging equipment and installation, as well as diplomas in EV Technology and Engineering Fundamentals of EVs. Since 2021, James has tested dozens of EV chargers and accessories, sharing expert insights into the latest EV charging technologies.
