Seems I have fallen for a hoax. Over the years, tesla charging stations appeared here and their. Some of them with a suspicious container. People told me that there is a backup generator in there, when the power grid fails to provide. But the generator /container ist to small to provide the output needed for supercharging. But I couldn’t find any article explaining the real purpose.

Oh yeah. More diesel generators in rural areas, because the local power supplies can’t keep up with multiple fast charging stations.

Edit : turns out that the container appearing at super charging station are not generators, it’s a hoax. But no one could tell me their exact purpose.