Battery cars become another line of trade at some point - Due to the
high winds at some parts of the year, stringing high tension lines
doesn't work well, and even if they did AC power isn't commonly used -
the idea of "cyclic" isn't as ingrained into the local thought process
without a day/night cycle, so they haven't really clicked on the idea
so there's locomotives that shuttle trains of them from the cities
back into the Noon Zone to recharge, then back to the city.