I was thinking they would use four, but eight makes more sense, at least given the current state of the technology.DanCar wrote:https://seekingalpha.com/article/4127493-tesla-truck-implications... the truck can handle 8 such connections. 8 x 216 = 1,728kW, or slightly above the needed 1,536kW to provide the 400 mile range in 30 minutes, with no breakthroughs. It’s simply a multiplication of what already exists. 12 charging modules (using the latest 72 amp module) x 8 Superchargers.
But let's take a look at the impact of charging trucks at 1.5 MW:
Assume 100% charger efficiency and that a given truck stop is provisioned with three-phase 480 VAC service. That service can provide about 20 MW of power. Let's assume the truck stop operations only use about 500 kW, leaving about 19.5 MW to charge the trucks. That means that the truck stop can handle a MAXIMUM of 13 trucks charging at a given time. With some intelligence in the chargers more trucks can share the available power with all of them charging more slowly.
I doubt that most truck stops have this much electricity available to them, but adding this capability should be possible at many locations. Then the next level of question becomes how much additional power the high-voltage lines that run along the interstates can handle. I'm thinking about places like the east coast of Florida where the power lines run right along the interstate. How many 20-MW loads can you drop onto the system before you need major upgrades to the lines.
Finally, how much PV power can a typical truckstop install in order to minimize their electricity costs? I'll guess most can install no more than about 10 MW, so the power will need to come from elsewhere, even during the daytime on sunny days. In the future when the goal is to run these trucks 24/7, I wonder if there will be strategies in place to limit most or all charging to daylight hours.
Let's be clear: These are challenges which will not be easily resolved. It will be relatively easy to add the first BEV trucks, but it will become more and more of a challenge in order to grow this idea to a significant percent of the overall fleet. I'm confident that it will be done eventually, but I also think it will take several decades to accomplish.