Well, could they contain batteries to act as a buffer for the times during heavy usage? The cabinets looked pretty large to me. I think they were about 7 or 8 feet tall and about 4 feet wide. The large cabinet with the doors looks to be the electrical equipment box. Since these are likely a standardized installation, I be someone here knows for sure. Maybe Don Tom?
There are no batteries involved. The large box is where most of the electric stuff is. The "chargers" themselves have very little inside them. There is the power bus, the bottle that holds the coolant which is ran down the cable and very little else.
I have seen inside them when I was charging using a
Magic Dock here. While I was charging my SS9- (Aug 22) a Tesla Supercharger repair man was working on a charger a few down from me. So we BSed for quite a while. BTW, he showed up in a Tesla Model 3, not a work van. But he knew what the problem was remotely, coolant leak from the cable. He got an alarm at his house near South Lake Tahoe and brought a new cable with him.
He knew very little about electronics or the chargers. But he knew all he needed to know to repair them, such as how to replace the charging cable, the main problem with Tesla Superchargers (probably with all the other DC fast chargers as well).
-Don- Auburn, CA