Hello oemof community,
I have a question regarding the general modeling philosophy of oemof.solph. Is it intended that components are always connected via a Bus, or is a direct connection between two components without a Bus in between also valid and supported?
As a more realistic example, consider this chain: a PV Source feeds a DC/DCConverter1, which feeds a DC Bus. A battery Storage and a DC/AC Converter2 are both connected to that Bus, and Converter2 feeds a grid Sink. My reasoning is that the Bus earns its place where Converter1, Storage, and Converter2 actually meet and need balancing, but the edges Source to Converter1 and Converter2 to Sink are exclusive 1:1 connections with nothing to balance, so I would connect those directly without a Bus.
I have already confirmed that direct connections work technically. My question is really about whether one should do this rather than whether it is possible. Is placing a Bus only where multiple flows actually converge a sound approach, or am I missing a reason a Bus should sit on every connection regardless, even the exclusive 1:1 ones?
Thanks in advance!