Tow range

[Cherrios111]

A common difference I’ve seen from various sources is about 1/2 range for a typical trip, 1/4-ish for grades. Here are some notes I’ve putting together to help me decide if I could tolerate the BEV instead of the Harvester:

BEV, 125 kWH battery, 350 mile range

Not towing:
350 miles at 2.8 mi/kWh, 10% is 35 miles, 20% to 80% adds 210 miles, 10% to 90% adds 280 miles

Towing:
175 miles at 1.4 mi/kWh, 10% is 17.5 miles, 20% to 80% adds 105 miles, 10% to 90% adds 140 miles

Towing steep grades:
87.5 miles at 0.7 mi/kWh, 10% is 8.8 miles, 20% to 80% adds 52.5 miles, 10% to 90% adds 140 miles
Climbing the Ike takes 9% of the battery

Harvester, 65 kW battery 150 mile range, 15 gallon gas tank 350 mile range

150 miles using 65 kWh is 2.3 mi/kWh, 10% is 15 miles, 20% to 80% is 90 miles, 10% to 90% is 120 miles
1/2 for towing is 75 miles or 1.15 mi/kWh, 10% is 7.5 miles, 20% to 80% is 45 miles, 10% to 90% is 60 miles
1/4 for towing steep grades is 37.5 miles or 0.6 mi/kWh, 10% is 4 miles, 20% to 80% is 22 miles, 10% to 90% is 30 miles
Climbing the Ike takes 20% of the battery

350 miles using 15 gallons of gas is 23.3 mpg, 11.7 when towing, 5.8 towing up a steep grade
Climbing the Ike takes 1.4 gallons

I made similar calculations for the pure towing with the BEV. I still plan to stay with full electric as I am comfortable for a few years towing with EVs and generally no range anxiety. But similar to yours, I calculated a range of 135 miles for the typical terrain in my area of rural Southern California under an average load of 8500 lbs. (dead trailer weight + load). I do have to say out loud, 135 miles per full charge creates a general worry if I consider multi-day journeys currently accomplished in a gas vehicle.