Great tips thank you. I’m going the other direction. The cord will come from the ceiling with a retractable tool balancer. I’ll have some spare length for different situations but don’t want too much. Ultimately I want the cable to retract up and out of the way when not being used.That number will vary based on suspension settings as well as tires selected. Other factors may include, if the truck sits for any amount of time, the air suspension can bleed off and it will sag a bit. Any I park in a carport that isn't totally level so the front will settle lower than the rear suspension. As a general rule, I'd say the charge port is about 3 feet high.
Since you're doing a level 2 charger in the garage here are a couple more thoughts I've done in the past:
At my old vacation house, I could only park the truck in the left-side of the garage, as the water heater and furnace didn't allow enough depth pull the truck in and close the door. The L2 Charger was mounted on the wall about 2-3 feet inside the garage. When the truck was pulled into the Garage there was enough cable to charge inside the garage. Additionally, there were times when the garage wasn't available to park and it was easy to charge in the driveway outside.
- Mount the L2 charger about 3 feet off the floor so your charging cable will reach farther. I have a friend who mounted his about 6 feet high, and he essentially lost about 3 feet of usable distance away from the charger as that cable has to drop to the floor before moving toward the vehicle being charged.
- Are you planning to park your Rivian on the left side or the right side of the garage? Since the charge port is on the left side of the vehicle, this can be a point to consider
- Think about mounting the charger closer to the large garage door than deeper inside the garage. This gives flexibility for running the cord under the garage door and being able to park outside (this is handy when guests are over).