パネル, 板
a flat, usually rectangular, piece of material, such as wood, glass, or metal, that forms part of a larger surface or is used to cover an opening
:
• The car door had a dented panel.
車のドアのパネルがへこんでいた。
• Solar panels convert sunlight into electricity.
ソーラーパネルは太陽光を電気に変換する。