Part of Haute-Marne (Grand Est), Châteauvillain counted 1,482 inhabitants as of the latest census.
OpenPVMapper's latest release puts Châteauvillain at 670 kWp of estimated rooftop PV capacity over 27 installations — 7th in Haute-Marne out of 402 communes with detections. The detections span 2019–2025. click here to see it on the map.
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