Technical Questions, page-2

Electric motors and batteries are pretty linear, bigger motor and batteries = more torque and power. This big enough for you? https://cleantechnica.com/2014/11/17/largest-truck-world-uses-4-electric-motors/

The physics of your towing would remain the same and require the same amount of work to move. You could probably calculate it from your fuel consumption and estimated drivetrain losses etc. Or figure it out from your tonnage. EVs are less lossy than ICEs.