Limit the shared capacity of technologies based on land constraints

Problem description

I am working on a model in which land for renewable electricity is a limiting resource. As long as technologies are not competing for land, this can easily be implemented in Calliope using the energy_cap_max constraint per technology. But when two or more technologies are competing for the same amount of land, one would need a constraint to limit the shared relative capacity to 1. I believe this is currently not possible within Calliope.

The group_share feature is close to what I’d need, in particular the energy_cap_max constraint. But instead of limiting the capacity to the entire system (which the latter does), I would need a shared_energy_cap_max constraint that limits the shared capacity relatively to 1.

Does that make sense? Is that anything that can and should be implemented?

Calliope version

0.6.3

[brynpickering]

Thanks for clarifying. Your suggestion would be valid, given that we have put an explanation of the group share constraint, among others, in the Advanced functionality section. But perhaps that should be separated into Advanced constraints and Advanced configuration (or similar).

That way, given that most constraints we add in the future may be considered advanced, there will be a clear place for them to reside.

[sjpfenninger]

What remains outstanding - documentation:

Outstanding here is the documentation: at the moment it is difficult to know this feature exists: one has to navigate to Listing of configuration options and then search for the right keyword.

Would it be reasonable to add the documentation of the feature to Advanced functionality?