Excellent condition. Used a handful of times. Packaged in original box and ready to ship. Selling because I haven't used it in quite a while. Price: $440 shipped continental US (Venmo only) - local pickup in CT or reasonable distance surrounding also available. S37W K930W SmartFoot Kit - compatible with all years of Pano Roof Sold new from Tesla for $550+Tax+Shipping (Yakima skybox not included)
I only used this setup on one trip so my results may not be the best to follow from. This was in a 2013 S85 (RWD) loaded up with 2 adults, 3 kids, and overpacked with vacation gear in frunk/trunk/rear seat floor and cargo box. The 100 mile drive to our first destination was 314 Wh/mi. This was lower than my non-cargobox average of 334 for the prior 3k miles. With the cargo box I went considerably slower (speedlimit max) and drafted very closely behind a bus for the majority of the drive. The overall trip was 415 miles at 339 Wh/mi so really wasn't that bad but I was going super slow. When I wasn't drafting behind a truck and going full highway speed I noticed a 20-30% increase (400+ Wh/mile consumption) and quickly slowed down or found a truck to draft.