In oemof.solph, there have been some bug fixes introduced. Most importantly, https://github.com/oemof/oemof-solph/pull/982 will remove the bias towards investments in the earlier course of the simulation as well as towards technologies with shorter lifetime. This might affect investment results as well.
Suggested fix
Update to newer oemof.solph version including this fix. Also, account for the renaming of "Transformer" to "Converter" in oemof.solph as well as the altered assignment of Investment objects to the nominal_value attribute.
Problem description
In oemof.solph, there have been some bug fixes introduced. Most importantly, https://github.com/oemof/oemof-solph/pull/982 will remove the bias towards investments in the earlier course of the simulation as well as towards technologies with shorter lifetime. This might affect investment results as well.
Suggested fix
Update to newer oemof.solph version including this fix. Also, account for the renaming of "Transformer" to "Converter" in oemof.solph as well as the altered assignment of
Investmentobjects to thenominal_valueattribute.