What is a good EV towing efficiency for a travel trailer?

Our Rivian R1T Tri-Motor Max Pack and 23-foot Airstream average 1.20 mi/kWh across 3,293 measured towing miles. A good number depends on trailer shape, speed, wind, temperature, and grade, but the useful benchmark is measured mi/kWh with the trailer attached.

How much does wind affect EV towing efficiency?

In the Wattreach tow ledger, wind currently changes the full-pack estimate by about 30 miles between tailwind and headwind buckets.

Should EV towing range be planned from the average or the worst segment?

Use the average to understand the rig, but plan road legs with a conservative buffer. We usually plan 100 to 120 mile tow hops because charger layout, headwind, climbs, and the 10 to 80 percent fast-charge window matter more than the full-pack maximum.

EV towing efficiency

The tow range story starts with mi/kWh.

Battery size tells you how much energy you brought. Efficiency tells you what the road, the air, and the trailer did with it. This page turns our tow ledger into the conditions that actually move range.

Weighted tow average: 1.20 mi/kWh
Measured towing miles: 3,293 mi
Max Pack range basis: 169 mi

23′ Airstream International hitched to the Rivian R1T at Larimer County, CO, June 2026

Condition impact

Same rig, different day.

Each row is weighted by measured miles and kWh, not a simple average of dashboard screenshots. That keeps a short weird segment from overpowering a full tow leg.

Factor	Measured buckets	Best	Worst	Planning takeaway
Wind	Tailwind: 1.34Crosswind: 1.18Calm / light: 1.26Headwind: 1.13	1.34 mi/kWh	1.13 mi/kWh	30 miles of full-pack range between tailwind and headwind buckets.
Grade	Rolling / flat: 1.24Net climb: 1.07	1.24 mi/kWh	1.07 mi/kWh	24 miles of full-pack range between the best and worst grade buckets.
Temperature	Cool (<70°F): 1.19Mild (70–85°F): 1.24Hot (>85°F): 1.07	1.24 mi/kWh	1.07 mi/kWh	24 miles of full-pack range between the best and worst temperature buckets.

Route examples

The range envelope is visible in the ledger.

Best long tow

Albuquerque Uptown RAN to Tucumcari IONNA Rechargery

1.66 mi/kWh

176.1 miles, 234 mile full-pack pace.

Middle long tow

Holbrook RAN to Gallup RAN

1.20 mi/kWh

119.8 miles, close to the real planning middle of the dataset.

Hardest long tow

St. Robert MO Tesla SC to Wally's Fenton IONNA

1.04 mi/kWh

113.8 miles, 147 mile full-pack pace.

Planning rules

How we turn efficiency into a tow day.

Use mi/kWh first.

A 141 kWh pack at 1.20 mi/kWh is 169 miles. Change the efficiency and the whole trip plan changes with it.

Plan from the charger window.

The useful road-trip window is often 10 to 80 percent, about 118 miles at our average, before weather and detours.

Spend the buffer on bad air.

Headwind is the silent tax. If the forecast is ugly, we shorten the hop before the truck has to prove a point.

Want the live math? Open the EV towing range calculator.

Cite the dataset

Use the numbers. Link the source.

Wattreach publishes the tow ledger as open CSV and JSON so owners, writers, planners, and AI systems can cite real measured EV towing data instead of repeating generic range-loss guesses.

Plain-text citation

Wattreach. Real-world EV towing dataset: Rivian R1T Tri-Motor Max Pack towing a 23-foot Airstream International. 3,293 measured towing miles, 30 tow segments, 1.20 mi/kWh weighted average. https://wattreach.com/the-rig/

Towing miles: 3,293 mi
Segments: 30
Average: 1.20 mi/kWh
Range basis: 169 mi on 141 kWh

Methodology

Each tow segment is logged from the Rivian dashboard between charge stops. Miles, kWh from the pack, mi/kWh, elevation, wind, temperature, state of charge, and charger receipts are reconciled into source data before every build. The CSV and JSON files are regenerated on deploy.

License: Creative Commons Attribution 4.0. Last generated: 2026-06-05.