Although the news at that time was about delivery of a first electric ferry, that was 2021 and things change. The Ferry company's web site says now it has three

Although the news at that time was about delivery of a first electric ferry, that was 2021 and things change. The Ferry company's web site says now it has three electric ferries as a result of conversions and indeed they charge at both ends of the route. It's in Norwegian but the translation looks reasonable to me.