Breakdown of El consumo aparece en kilovatios hora en la factura.
Questions & Answers about El consumo aparece en kilovatios hora en la factura.
Because consumo is a noun here, and Spanish often uses the definite article when talking about a specific thing or a concept already understood from context. In this sentence, it means the usage/consumption shown on the bill, so el consumo is natural.
English often drops the article in places where Spanish keeps it.