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@jkiviluo jkiviluo released this 01 Sep 10:50
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v4.0.0
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jkiviluo Juha Kiviluoma
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FlexTool 4.0.0 — first stable v4

FlexTool is now pip-installable: pip install flextool. This is the first stable 4.0.0 release. main is now the default branch and master is deprecated.

Database migration v67 → v69 (automatic on load). Additive and defaults to prior behaviour — a migrated database is byte-identical until you opt into the new features.

Highlights

  • Now on PyPI. pip install flextool, launch the GUI with flextool, update with pip install --upgrade flextool. Cross-platform CI (Linux, Windows, macOS) is green.
  • Rust-based matrix generation. A thin Python layer builds the optimisation matrix in polars and solves with HiGHS, with automatic problem scaling that often speeds up the solve considerably.

Representative periods

  • Net-load representative-period clustering (--netload-clustering) — cluster on a real-MW net-load signal instead of normalized profiles; --vre-penetration tunes the demand-match target. Default path is byte-identical.
  • group.use_for_representative_periods (schema v68) — mark region-groups as net-load aggregation units.
  • Net-load iteration driver — invest-only iterate-until-stable loop; --keep-best keeps the lowest full-year dispatch-cost set.

GUI

  • Dispatch plots & colors/order — live picker (debounced, no Apply button), two-pane category/entity layout seeded from solved output, flowGroup/nodeGroup band ordering, and assorted plot fixes.
  • Calibrate investments — three-way RP-alternative disposition (detached / add / new_scenario), final outputs driven by the project's File-outputs choices, per-scenario report folders.

Outputs

  • Multi-use storage nodes now surface in node balance & price (plain batteries stay hidden).
  • existing capacity column is the pre-invest baseline, not the cumulative chain-sum.
  • Upgrade-safe results DB schema (additively tops up an older results.sqlite).

Fixes

  • Var-unit inter-period storage balance for blended weights (unit-size mis-scaling).
  • max_flow_for_unconstrained_variables override now honoured.
  • Representative-period hull seeded with force-included periods.
  • v38 node_type migration floor written to a dedicated lowest-rank alternative.
  • Windows: ensure_settings_db no longer mis-parses drive-letter paths.

Full changelog: see CHANGELOG.md.

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