24/7 mobile jump start for your Tesla Roadster (2008–2026) in Sacramento using ECU-Safe Regulated 12V/16V EV Auxiliary Power Supply.
Step 1: Pop round tow-eye cover on front bumper and apply 12V to the two color-coded leads to release the front trunk (frunk) latch. Step 2: Remove upper cabin intake apron inside frunk to access the low-voltage jump posts.
When a Tesla's 12V or 16V low-voltage battery dies, the high-voltage contactors cannot close—leaving the screen black, doors locked, and charge port frozen even if the main battery has 80% charge! Late 2021–2026 Model 3/Y/S/X vehicles use a 16V Lithium-Ion battery that rejects standard 12V jump packs if voltage is below 14.8V; our EV service carries regulated 15.5V/16V power supplies specifically for Tesla Li-Ion recovery.
Post-boost verification of PCS (Power Conversion System) High-Voltage to Low-Voltage DC-DC Converter output (13.8V–14.8V on 12V; 27.6V–28.4V on 24V commercial).
| Generation | Battery Group | CCA | Alternator | Starter | System Notes |
|---|---|---|---|---|---|
| Roadster (2021–2026) | Group 51R 12V AGM (2012–2021) / 16V Lithium-Ion Low-Voltage Battery (late 2021–2026) / 48V Architecture (Cybertruck) | Low-Voltage Auxiliary System (12.8V AGM or 15.5V–16V Li-Ion) | PCS (Power Conversion System) High-Voltage to Low-Voltage DC-DC Converter (14.2V–14.8V) | High-Voltage Pyro Disconnect & Main Contactor Closure via 12V/16V Low-Voltage Rail | Smart LIN/BSD Regulated AGM / Aux |
| Roadster (2015–2020) | Group 51R 12V AGM (2012–2021) / 16V Lithium-Ion Low-Voltage Battery (late 2021–2026) / 48V Architecture (Cybertruck) | Low-Voltage Auxiliary System (12.8V AGM or 15.5V–16V Li-Ion) | PCS (Power Conversion System) High-Voltage to Low-Voltage DC-DC Converter (14.0V–14.6V) | High-Voltage Pyro Disconnect & Main Contactor Closure via 12V/16V Low-Voltage Rail | High-Reserve AGM / EFB Start-Stop |
| Roadster (2008–2014) | Group 51R 12V AGM (2012–2021) / 16V Lithium-Ion Low-Voltage Battery (late 2021–2026) / 48V Architecture (Cybertruck) | Low-Voltage Auxiliary System (12.8V AGM or 15.5V–16V Li-Ion) | PCS (Power Conversion System) High-Voltage to Low-Voltage DC-DC Converter (13.8V–14.4V) | High-Voltage Pyro Disconnect & Main Contactor Closure via 12V/16V Low-Voltage Rail | High-CCA AGM / Lead-Acid |
| Roadster (1998–2007) | Group 51R 12V AGM (2012–2021) / 16V Lithium-Ion Low-Voltage Battery (late 2021–2026) / 48V Architecture (Cybertruck) | Low-Voltage Auxiliary System (12.8V AGM or 15.5V–16V Li-Ion) | PCS (Power Conversion System) High-Voltage to Low-Voltage DC-DC Converter (13.8V–14.2V) | High-Voltage Pyro Disconnect & Main Contactor Closure via 12V/16V Low-Voltage Rail | OEM Group Lead-Acid / AGM |
| Roadster (1980–1997) | Group 51R 12V AGM (2012–2021) / 16V Lithium-Ion Low-Voltage Battery (late 2021–2026) / 48V Architecture (Cybertruck) | Low-Voltage Auxiliary System (12.8V AGM or 15.5V–16V Li-Ion) | PCS (Power Conversion System) High-Voltage to Low-Voltage DC-DC Converter (13.6V–14.2V) | High-Voltage Pyro Disconnect & Main Contactor Closure via 12V/16V Low-Voltage Rail | Standard BCI High-CCA |
