To model a range of solvent conditions, we defined two additional sets of non-bonded CG parameters to approximate solvation in a poorer solvent and a better solvent than DCB. The IBI method used in this work relies on the AA reference systems being homogeneous, which makes it challenging to parameterise models in poor solvents, in which extensive aggregation is expected. Instead of explicitly parameterising the model in other solvents, we adopted a simpler approach of scaling the non-bonded parameters obtained in DCB to give either 20% stronger or 20% weaker interactions. These two cases will be referred to as the poor solvent and the "good" solvent, respectively. The system with the original parameters, parameterised in DCB, will be called the in-termediate solvent. It is important to note that some aggregation occurred in the CG simulations with all three of these solvent conditions, which means that all were, according to the conventional polymer physics definition, relatively poor solvents. We therefore use the terms "good" and intermediate to refer to the better solvents, in which, according to UV-vis spectra of P(NDI2OD-T2) in solvents such as DCB and chlorobenzene, only intermediate aggregation is observed. The non-bonded parameters and potentials for these three cases are given in the ESI, Section S14.