This is an entirely new version of PowNet that includes the following key features:

• The underlying algebraic modeling language is gurobipy, which replaces Pyomo. gurobipy is faster than Pyomo and has lower memory requirements.
• A model created with PowNet can be solved with Gurobi as well as the free, open-source, solver HiGHS.
• The mathematical formulation of PowNet is based on the 'strong' MILP formulations proposed by Knueven et al. (2020).
• DC power flow is represented through different methods proposed by Hörsch et al. (2018)). These include both voltage angle and cycle flow formulations.
• The implementation of PowNet is modular, so it allows users to include new formulations for a given constraint.
• Models for a given country are built fully from .csv files.
• Visualization of the model output has been standardised w.r.t. previous versions.