4 ms·
I neglected to mention rectifying, but to clarify I meant that the process of stepping down wants to be AC, not that the battery wants AC.
by hunter2_ 1y ago
I neglected to mention rectifying, but to clarify I meant that the process of stepping down wants to be AC, not that the battery wants AC.
- privatelypublic 1y agoDC fast charging is already 500-800volts- so 125A max for 100kW, only they liquid cool the lines so you're not trying to plug in a big floppy... 4/0awg... anyway, its mostly a water/liquid jacket- not copper.
- formerly_proven 1y agoMost DCFC cables are not watercooled. A typical 175 kW / 350 kW (400 V and 800 V, respectively) DCFC cable spec is 4x50 + 1G35 + 3x 2x 1, so around 250 mm² of copper, about 2.5 kg/m. They're usually around 4 m long (exterior to the dispenser), let's say five bucks per kg, so 2.5 * 4 * 5 = 50 bucks each. Most chargers have two cables, so 100 bucks. I'm guessing the methhead bringing them to the scrap fence/yard gets like 15 bucks for having caused around 10k in property damage. Though in many of these cases the cables are not actually stolen. People just cut them off and throw them in the bushes or don't even bother moving them. In those cases the motivation is obviously anti-EV vandalism.
- quickthrowman 1y agoI’ve never seen a DC ampacity table but #1 wire is all you need for 125A of AC current (assuming 75 degree rated terminals)