Your electricity bill comes in kWh, or 1000W/h increments. The higher the number, the more energy you are using to move your vehicle. So, Wh/km is how much energy it takes to drive 1 km, analogous to L/100km. The basics: a Wh = “watt-hour”, a unit of energy.The table below is a bit data-dense – have a look, then continue on to my key points below: Consumption results from various tests with a roof box and hitch bike rack on a Tesla Model 3 What follows are my results – if you prefer to see it in video form, check out my YouTube channel. You can adapt these values for use with the Model Y as well – see the bottom for more. Read on to find the values I use when planning out my longer road trips – because the car cannot recalibrate it’s range estimate enough to compensate for the added consumption ( it tries, but it is always wrong), it is important to have these values. I decided to re-run the consumption test, but this time including a bike rack, a Northshore rack that I’ve been using for several years on a few different cars.

how much did the Wh/km change?)Ī few months after that last post/video, in the spring of 2019, I received and installed a Stealth Hitch on my Model 3 (post coming “soon”).

A few years ago, I reported on my experience installing the Tesla roof rack on my Model 3 ( apparently the bolts are a bit longer now and easier to install), and shortly afterwards I tested the impact on consumption/efficiency (i.e.

Model 3 roof rack installation