WattWorks EV Repair

01/08/2026

04/27/2025

Always happy to set up for the test drive event that the OEVA puts on at the Daimler Truck headquarters on Portland. Lots of cool EVs here available to test drive!

01/22/2025

It's a frosty morning here at WattWorks!

10/26/2024

For any of my friends with an interest in EVs, last month I was lucky enough to get to participate in a cross country EV race. There were a total of 10 cars, 8 of which were some of the longest range/fastest charging sedans on sale today, plus a gas car for comparison, and a nearly 12 year old Tesla Model S to see how far we've come (which was the car I was in for this trip).

The first episode of a 4 part series documenting our trip just dropped today on the Out of Spec Motoring YouTube channel. This first video mainly just details the cars participating, and the rules of the race. The real fun will start with next week's episode!

The I-90 Surge starts now! Here are all of the cars participating in our race across the country to see what’s the best road tripping EV. We’ve selected all ...

10/23/2024

It's nearly a full house here at Wattworks!

09/21/2024

Picked up a battery pack to be installed in a customer's Model S this week!

05/03/2024

Inspecting the Large Drive Unit in your Tesla Model S or X (or other LDU powered vehicles) for coolant intrusion on a regular basis is extremely important in order to keep it running long term! This is why we are offering FREE "speed sensor" checks for all LDU equipped vehicle owners.

These motors are VERY prone to a failure of the rotor coolant seal, which leads to an internal coolant leak inside the Drive Unit. This leaking coolant can cause all sorts of issues, such as corrosion, loss of HV isolation, and damage to the inverter electronics. Often there are little to no warning signs that coolant is leaking before it's too late, so it's imperative to catch a leaky rotor coolant seal early, BEFORE it destroys your LDU, especially if your car is out of warranty.

QC Charge has specialized in rebuilding the LDU for over 6 years now, and our newest product is our rotor coolant delete manifold, which completely eliminates the rotor coolant seal failure mode (similar to what Tesla has started doing on their latest revision of the LDU within the last 5-6 months).
Vehicles that use the Tesla Large Drive Unit are:
2012-2021 Tesla Model S, RWD and Performance versions only
2016-2021 Tesla Mode X, Performance versions only
2012-2014 Toyota RAV4 EV
2014-2017 Mercedes B-Class ED/B250e

If you want to schedule a time to bring your Tesla LDU equipped vehicle in to have the speed sensor checked for free, please reach out to make an appointment!

QC Charge #2
8750 NE Emerson St.
Portland OR, USA
97220
+1 (971) 444-5064
[email protected]

04/28/2024

We're all set up for the Drive Electric Earth Month Expo in Portland, hosted by the Oregon Electric Vehicle Association!