Crossposting this over from my Tiny Camper thread. I'm back sitting on the fence about spending the money on the beefy hitch for my Volt.
Here's the nuts and bolts of the big million dollar question
I was doing some GoogleFu on "vehicles with surprising tow ratings" and low and behold, look what I found....
Need to tow but not interested in driving a full-size truck on a daily basis? Here are some vehicles with surprising tow capacities.
www.forbes.com
Look at the 4th car.
When you compare the numbers side by side..going back to the big question of "Will my Gen1 pull my 1500# camper"....
Gen 1 engine capabilities.
Output (kW / hp @ rpm): | 63 / 84 @ 4800 (est.) |
Gen 2 engine capabilities
Output (kW / hp @ rpm): | 75 / 101 @ 5600 |
So the Gen2's engine makes an additional 12 horsepower.
Gen 1 electric capabilities.
Motors (two); | drive motor, 111 kW; generator motor, 55 kW |
Gen 2 electric capabilities
Motors (two); | twin-motor arrangement, 110 kW |
This bit is a little unclear. The 55kw generator capacity on the Gen1 is the big issue here (read more below) but it's unclear to me how many kw the Gen2 can actually generate - it can't be 110kw knowing what I know. I'll dig some more.
Gen 1 electric horsepower
Power (kW / hp): | 111 / 149 |
Gen 2 electric horsepower
Power (kW / hp): | 111 / 149 |
Gen 1 Torque
Torque: (lb-ft / Nm): | 368 / 273 |
Gen 2 Torque
Torque: (lb-ft / Nm): | 294 / 398 |
When you put all the numbers together, what stands out is the Gen2 with about 20% more horsepower and likely *some* increased generator capacity as a result. But how much is unclear.
And this is where it gets technical.
My concern with the Gen1
isn't the raw ability for the car to haul the trailer. I know it'll do that just fine....it's for the engine to keep up with the power demands - the Gen1 can only make 55kw of power with the engine wound right out wide open but the car can use north of 100kw at full load.
With the car in Mountain mode there will be a "buffer" of extra battery capacity held onto for hard demands ...so if the car is drawing 100kw and the engine only provides 55kw, the battery buffer provides the rest and the engine tries to rebuild that buffer afterwards.
Therein lies the problem. I know the car will pull the trailer (and probably quite well at that, electric power wins all the time), but if the car is consuming (for example) 60kw at cruise and the engine can only generate 55kw, well, the battery is slowly getting drawn down. When the battery reaches 16% on the Volt it loses it's **** and goes into a reduced propulsion mode so that the engine can bring the battery back up to a safe baseline 22% again.
The big million dollar question is....how many kw will the car consume towing the trailer at 90kph which is what I'd be happy towing at on secondary roads etc.
Looking at these numbers I'm starting to think more and more that maybe I just need to spend the money on the damn hitch and YOLO it.
If it works, it's a win. If it doesn't, well, I take the hitch off and try to recover 50% of the cost at least and then go with one of the plan B options.