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.
I doubt it. https://pubmed.ncbi.nlm.nih.gov/16033124/