Boston's got some of the solar-powered ones, I've seen them late 2022: https://blog.eink.com/bostons-ink https://blog.eink.com/bostons-ink Looks like they were

Boston's got some of the solar-powered ones, I've seen them late 2022: https://blog.eink.com/bostons-ink https://blog.eink.com/bostons-ink Looks like they were also using them for transit at one point, but I haven't seen these myself: https://www.mbta.com/projects/solar-powered-e-ink-signs https://www.mbta.com/projects/solar-powered-e-ink-signs