vectorgrid

VectorGrid is a source-available Python library and desktop application for modern power system analysis. It is aimed at distribution-grid work, with material on the site describing evolving grids, technical losses, and the growth of distributed energy such as solar panels, batteries, and EV chargers as the problems it addresses. The product emphasizes inspection of the solver and verification of the mathematics behind its results.

Its current analysis set includes power flow analysis, which calculates voltage profiles, active and reactive power flows, and grid losses across a network. The power flow engine is described as a full Newton-Raphson solver validated up to 5000 buses. Additional studies listed as coming soon include short-circuit analysis per IEC 60909, hosting capacity analysis for solar, wind, storage, or EV chargers, optimal power flow, Volt/VAR optimization, network reconfiguration, and DG allocation. The site also says these studies have been validated on IEEE and CIGRÉ test cases against industry tools such as PSS/E and PowerFactory.

VectorGrid can be used in three ways. The Python library is installed with pip and offers a full API for the analysis and optimization modules, with integration for NumPy, Pandas, and Jupyter. The desktop application is a local-first native app with an interactive network editor, visualization, one-click analysis, and offline use with no cloud dependency. A cloud platform is listed as coming soon, with browser-based access, team collaboration, shared networks, and scalable cloud compute for large analyses. The first release is described as including power flow analysis and a full network editor.

Pricing is shown as simple and transparent, with no per-module fees and no simulation limits. The library is free forever under the Business Source License. The desktop application, called Desktop Pro, costs €1,500 per year or €125 per month billed annually, and is free to try for networks up to 10 buses without a credit card. Academic users receive an 80% discount, and team and enterprise licensing is available with multi-seat licenses, SSO, and dedicated support. The engine’s source code is published under the Business Source License and is available to read, audit, and verify.