PyPSA-Eur is an open model dataset of the European power system at the transmission network level that covers the full ENTSO-E area. The software pipeline to assemble the model is developed at https://github.com/PyPSA/PyPSA-eur and documentation is available at pypsa-eur.readthedocs.io. The optimization is now performed using the pyomo=False setting in the pypsa.lopf.network_lopf. This speeds up the solving process significantly and consumes much less memory. The inclusion of additional constraints were adjusted to the new implementation. They are all passed to the network_lopf function via the extra_functionality argument. The rule trace_solve_network was integrated into the rule solve_network and can be activated via configuration with solving: options: track_iterations: true. The charging and discharging capacities of batteries modelled as store-link combination are now coupled (#116). An updated extract of the ENTSO-E Transmission System Map (including Malta) was added to the repository using the GridKit tool. This tool has been updated to retrieve up-to-date map extracts using a single script. The update extract features 5322 buses, 6574 lines, 46 links. (#118). Added FSFE REUSE compliant license information. Documentation now licensed under CC-BY-4.0 (#160). Added a 30 minute video introduction and a 20 minute video tutorial Networks now store a color and a nicely formatted name for each carrier, accessible via n.carrier['color'] and n.carrier['nice_name'](networks after elec.nc). Added an option to skip iterative solving usually performed to update the line impedances of expanded lines at solving: options: skip_iterations:. snakemake rules for retrieving cutouts and the natura raster can now be disabled independently from their respective rules to build them; via config.*yaml (#136). Removed the id column for custom power plants in data/custom_powerplants.csv to avoid custom power plants with conflicting ids getting attached to the wrong bus (#131). Add option renewables: {carrier}: keep_all_available_areas: to use all availabe weather cells for renewable profile and potential generation. The default ignores weather cells where only less than 1 MW can be installed (#150). Added a function _helpers.load_network() which loads a network with overridden components specified in snakemake.config['override_components'] (#128). Bugfix in base_network which now finds all closest links, not only the first entry (#143). Bugfix in cluster_network which now skips recalculation of link parameters if there are no links (#149). Added information on pull requests to contribution guidelines (#151). Improved documentation on open-source solver setup and added usage warnings. Updated conda environment regarding pypsa, pyproj, gurobi, lxml. This release requires PyPSA v0.17.0.