Am I the only one thinking that a small portable generator would be a perfect mate for the Tesla Truck?
You may want to take a look at the Silverado conversions made by Via Motors. They keep the V6 motor, but it is used as a generator to keep the ~24 kWh battery pack topped off. Small, portable generators don't put out the proper, grounded voltage that a Tesla product requires. I'm sure people would buy them anyway, but it would be a waste. You'd have to use one of the BIG diesel generators.
When you start getting into commercial loads a battery EV just fails on so many levels. Yes with a F450 based EV you could tow a 20,000 lbs 40 foot RV 5th wheel up the Colorado mountains, but how big would the battery pack need to be to go 200 miles in range loaded like that?
I don't believe an EV fails in heavy applications at all. The nation moves goods coast-to-coast on trains that have diesel motors attached to electric motors. It is the smooth, effortless delivery of torque from electric motors that drives such locomotives. Electric vehicles move heavy loads in other applications as well: in/at/around seaports, airports, and warehouses all over the place.
If you presume that 10% of a 220 kWh battery pack is used for battery protection, and that someone typically charges to only 90% of what remains... Then, yes, that would come to about 180 kWh remaining.
If we figure efficiency at around 600 Wh per mile, while towing, you can go 300 miles using 180 kWh. For comparison, the Toyota Prius uses something like 674 Wh per mile in energy equivalent. Even if you up the ante to 900 Wh per mile, you still have a 200 mile range. More than enough to bridge Superchargers.
What is the cost of that battery?
I don't believe Tesla Motors is interested in selling battery packs. They want to sell complete vehicles. With that in mind, JB Straubel has said the batteries represent about 25% of the vehicle cost. So, the battery pack in a $60,000 vehicle would cost around $15,000 to fabricate. For this to be a 220 kWh battery pack, Tesla's cost would have to be around $68 per kWh. At 170 kWh it would be $88 per kWh. I expect Tesla Motors to have their costs in that range by 2022.
If i only tow that load 5 times a year do i really want to spend an additional $40,000 for capacity i only use on occasion?
Luckily, by the time Tesla Motors offers a pickup truck, there will be no such premium applied for comparable electric drive vehicles. However, I would advise someone who only needed to tow in the 15,000+ range five times or less per year to rent instead of buying.
If Tesla can come up with a good design I would recommend them sticking to the F150 size as that market is willing to pay premium and not hard lined on TCO.
The best thing about the F-Series design is that it is so modular. You can literally pick and choose from the parts bin as you see fit. But Tesla Motors has no need to match or surpass that flexibility. All they need do is match the most capable configurations and then exceed their abilities to make a strong first impression.
In my estimation, that is Crew Cab, with longbed, shortbed, and dually options only. So, only four door versions. No two door or half-door suicide variants. No need to set up for campers, bobtails, flatbeds, dumptrucks, tow trucks, or equipment carriers. Thus, it would be of purely unibody construction -- no detached bed -- no full box I-beam chassis layout. Fully independent suspension is a must, so no live axle or leaf springs either.
When you start talking the class 3+ vehicles, those vehicles are much more likely to be pulling 10,000 lbs plus loads and/or longer distances which requires much larger/expensive packs.
Torque is king in hauling and towing. Electric vehicles are the kings of torque. There is no need to sideline the very best aspect of using an electric pickup truck. The Tesla Model S P85D has shown that despite its two-and-a-half ton heft, it has plenty of get up and get gone. Once a pickup truck can be built at about the same weight, or no more than 500 lbs heavier, while carrying at least twice the storage capacity at 170 kWh or more, moving another 10,000 or 15,000 lbs will be child's play.
For the commercial market you really have to focus on the dedicated routes like the mail carrier, class 8 garbage trucks or local delivery vehicles. If you have a stable route and size your batteries appropriately, you can make efficient use out of the battery for every day.
There are plenty of heavy equipment companies that are already pursuing this strategy. It works fine for municipal vehicles, local delivery routes, and operation at private campuses, or government facilities. It is not appropriate for sales to individuals for general use. The compromises (and prejudices) that make perfect sense for institutions that strive to reduce maintenance and fuel costs while expanding their fleets must be left behind when selling to the public.