Tesla Model S Onboard Charger – Gen 1 (6009278-00-F)
Fits early Tesla Model S (approx. 2012–early 2016) with the first-generation onboard charger stack. Always confirm part number 6009278-00-F on your original unit or in the Tesla EPC before ordering.
The onboard charger (OBC) converts AC power from your wall connector or public EVSE into high-voltage DC for the main traction battery. This listing is for an OEM Gen 1 Tesla Model S onboard charger, part number 6009278-00-F, used in early Model S vehicles equipped with the original charger stack architecture.
Units are sourced from donor vehicles, cleaned, visually inspected, and function-checked before shipment. Ideal as a direct replacement when your existing charger has failed and is logging AC charging faults or refusing to start a charge session.
Why these fail
- Thermal stress over time – Repeated high-current AC charging cycles heat internal components, stressing power electronics and solder joints.
- Moisture or contamination – Compromised seals, coolant leaks, or condensation can lead to corrosion and internal shorts.
- Grid and voltage events – Poor power quality, brownouts, or voltage spikes can damage input stages and EMI filtering.
- Aging components – Electrolytic capacitors and other wear-out parts eventually drift out of spec and trigger charger fault codes.
- Secondary damage – Prolonged operation with intermittent faults can stress the HV junction box and connectors if not addressed early.
Our solution
- Genuine Tesla hardware – OEM 6009278-00-F charger module, not an aftermarket substitute.
- Cleaned and inspected – Mounting ears, HV/low-voltage connectors, and coolant ports are checked before shipment.
- Known-good replacement – Intended as a like-for-like swap for failed Gen 1 onboard chargers in early Model S vehicles.
- Backed by Gruber – Sold by a shop that specializes in Tesla and EV power electronics, with technical support available.
- Ideal for service centers – Useful for independent EV shops and fleet operators needing a tested spare on the shelf.
| Tesla Part Number |
Onboard Charger – Gen 1 6009278-00-F |
| Vehicle application |
Early Tesla Model S (approx. 2012–early 2016) originally equipped with Gen 1 charger stack |
| Function |
Converts AC input from Level 1/Level 2 EVSE into high-voltage DC for the traction battery |
| Charger generation |
First-generation sealed onboard charger used in early Model S charger stacks |
| Approximate output |
Up to ~10 kW AC charging capability as a single module (vehicle-configuration dependent) |
| Condition |
Pre-owned OEM unit, cleaned and inspected; normal cosmetic wear from prior service is expected |
| Warranty |
Limited 90-day replacement warranty from ship date (contact us if your application requires different terms) |
Service & coverage
Installation of high-voltage components should only be performed by technicians trained on EV safety and Tesla procedures. If you are unsure about charger generation, build date, or compatibility with your HV junction box, contact us with your VIN and existing part number before ordering so we can help verify fitment.
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Maintenance tip:
If the car will DC fast-charge (Supercharge) but refuses AC charging or frequently aborts sessions with “Charging error” messages, the onboard charger or related HVJB wiring may be at fault. Address these symptoms early to avoid collateral damage to connectors and contactors.
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Need help confirming this is the right charger?
Contact Gruber for pre-sales technical support and charger stack compatibility questions:
480-921-8000 or use the contact form on our website with your VIN and a photo of your existing charger label.
