Thanks for the reply. I got a trailer 8 by 10 that weighs around 1350-1400lbs when it is loaded. I pull the trailer several times a year including a 6 mile long Turnpike Hiway with a 8-9% uphill. There is also a 3 mile uphill at 7-11% grade two lane road I am also concerned about. Year ago I used an 89 Taurus wagon with all 140 HP (125ft/lbs torque?) and barely (in first gear) made it over the top of the uphills. My aging 96 Sable wagon has 200 HP and 200 Ft Lbs of torque and barely breaks a sweat going over the uphills.

How long (time wise) can the electric battery assist the engine with this demanding task? If it constantly assists with the task, then is the Horsepower rating is 155 and torque figures nearly the same? If the battery becomes "depleted" how long before it can begin assisting with this task?

Better to ask questions even if they are "dumb" before purchase than learning the hard way after the purchase.