Do subway trains have batteries for the purpose of moving themselves? I don’t know much about subway trains specifically, but in my imagination I can’t picture one working during a power outage.
If they don’t carry large batteries then it makes perfect sense to me to dump the energy back into the grid. Electrical losses should be fairly small.
I don’t mean to derail the conversation, but it pains me to say that Europeans have been financing the ethnic cleansing of Artsakh by buying Azerbaijani oil with almost no repercussion.
At some point I stopped trying to make sense of it and let the general feelings carry me forward. It’s bizarre and dark, but in a captivating way.