Tesla Roadster

DC-DC Converter Rebuild

This Auxiliary Power Supply (APS) sub-assembly is a DC to DC Converter that converts the 400 Volt DC pack voltage to 13.8 Volts DC to power Roadster electronics, headlights, audio, VMS Module, Window Regulators, Door and Trunk Actuators, and charges the 12 Volt auxiliary battery which resides inside the Passenger Fender on 2.x Roadsters.

It was originally made by Eaton, Martek, and Delta Electronics. It is a custom part, made for the Tesla Roadster, and includes the same plumbing as the ESS Battery Pack Sheets. It also incorporates the thermal potting compound found in Roadster ESS Battery Pack Sheets. The assembly is buried inside the battery packs and requires a battery pull for service.

Tesla may have dwindling supply left. Spares are often harvested from donor Roadsters, the supply of which is also steadily declining. Even if a replacement is found, they have aged and are most likely full of deferred maintenance issues. There are 4 large electrolytic capacitors in the 400VDC input section of this assembly. These are the same electrolytic capacitors found in the Roadster PEMs, and like the PEM, this assembly needs a rebuild every 8-10 years since that is the service life of large capacitors.

Fortunately, this part is repairable and rebuildable. We have successfully reverse engineered this sub-assembly, have schematics, and are offering full rebuild services.

Around 2000+ Roadsters are running around with parts aged 10+ years. We recommend rebuild of the electronics buried in the ESS Battery Pack, including the BSM board, whenever a battery upgrade and battery sheet replacement is done.

DC-DC Converter Rebuild Detail

DC-DC Converter in ESS Pack

Electrolytic Caps inside the unit

Capacitors have an 8 year service life

Tesla Service Center

Gruber Motor Company is an independent Electric Vehicle Service Center specializing in Tesla vehicles. Electric Vehicles are a developing transportation method. A new breed of Automotive Service Centers are emerging that more closely resemble electronics and software engineering labs. Gruber Motor Company has decades long experience servicing Critical Power equipment which is the same fundamental technology now found in Electric Cars.

Housed in an 8000 sq’ state of the art Service Center, we schedule you right in. We believe in old fashioned customer service, always ready to exceed your expectations. We can also handle low tech auto – tires, brakes, detailing, powder coating, clear bra, paint, and much more.

We are proud of our EV Service Center of the Future

Our EV Lab is where Software and Electronics repairs take place

Gruber Motor Company
203 West Lone Cactus
Phoenix, Arizona 85027
EV@GRUBER>COM

602-863-2655 X500

Gruber Motors