Complete electrical network modeling, simulation, and analysis — without expensive software licenses. Open source, built on pandapower, OpenDSS, and ANDES , and independently validated against commercial software. No installation or setup hassle Access from any computer, anywhere Automatic updates with new features Secure cloud storage for projects Priority email support Support open-source development No signup needed to explore the editor — pay only when you run simulations ($10/month). View pricing Analysis Capabilities Powered by pandapower , OpenDSS , and ANDES — choose the engine per study. Full details in the documentation → Load flow — Newton-Raphson and more (pandapower), plus snapshot/daily/yearly modes (OpenDSS) Short circuit — IEC 60909 (pandapower) and fault study on all buses (OpenDSS) Arc flash — IEEE 1584-2018 incident energy, AFB, PPE (pandapower) Motor starting — voltage dip for DOL / soft-start (steady-state & dynamic) Transient stability — time-domain simulation after faults / line trips (ANDES) Eigenvalue analysis — small-signal stability, damping, and oscillatory modes (ANDES) Optimal power flow — AC/DC constrained OPF with branch and bus limits Protection coordination — fuses, relays, topological grading, IEEE/earth-fault/directional OCR, differential & distance evaluators Contingency analysis — N-1 cases for lines and transformers Harmonic analysis — voltage/current distortion, THD, filters (OpenDSS) Time series simulation — controllers in the loop for daily or seasonal profiles Reactive power capability (PQ diagram) — capability envelope at the PCC vs grid-code curves Economic analysis — CAPEX, power losses, and energy loss cost breakdowns Controllers in load flow — transformer tap and shunt step controls Independently Validated University of Palermo — Master's Thesis Electrisim's results have been independently validated against Neplan (commercial software) in two master's thesis from the University of Palermo, confirming accuracy across load flow, short circuit, and other analyses. Internally Validated Offshore wind load flow is checked by running the same model through pandapower and OpenDSS: about 70 buses, 35 branches, and 450 MW of wind—demonstrating consistent results across two major solvers. Commercial-Tool Validation Electrisim's pandapower engine passes 250+ automated tests. Power flow and short-circuit results for every element are validated against DIgSILENT PowerFactory and PSS Sincal, with strict tolerances on voltage (0.000001 p.u.), angles (0.01°), and loading (0.001%)—continuous integration on every change. Comparing with PowerFactory We are constantly testing Electrisim with other commercial software, especially Digsilent’s PowerFactory. The results match within rounding. The test cases are available as one of the templates. Explore guides engineers search for: ETAP alternative · PowerFactory alternative · Load flow tutorial · Short circuit analysis · Wind farm reactive power · Free models Open Source on GitHub registered users, and growing Electrisim is built on three widely adopted open-source power system engines. Download totals: PyPI downloads worldwide Source: PyPI download stats downloads worldwide since 2008 PyPI downloads worldwide Source: PyPI download stats Get started in three simple steps Draw Your Network Drag and drop electrical components onto the canvas to build your power system model. Buses, lines, transformers, generators, loads, and more. Configure Parameters Set voltage levels, power ratings, impedances, and other parameters for each component through intuitive dialog forms. Simulate & Analyze Run load flow, short circuit, arc flash (IEEE 1584), protection coordination, optimal power flow, reactive power capability (PQ), or other analyses and view results instantly on the diagram and in tables. Create & Simulate Power Systems in Under 60 Seconds Watch how easy it is to model complex electrical networks with our intuitive drag-and-drop interface About the software Model an electrical system, perform simulation and analyse results in a secure cloud software. You can also run the software locally — check the open-source code . Currently, the power flow, short circuit analysis, arc flash analysis (IEEE 1584-2018), motor starting / voltage dip, transient stability and eigenvalue analysis (ANDES), protection coordination study (beta), optimal power flow, contingency analysis, controller simulation, time series simulation, economic analysis, and reactive power capability (PQ diagram) are available. More to come soon. Works in your browser or as a desktop application – you choose which is better for you. Free & Open-Source Completely free to use when deployed locally. Built by passionate power engineers and developers, Electrisim democratizes access to professional-grade power system analysis tools for everyone. Learn more about our mission . Tried and tested solution The calculation algorithms are based on Pandapower , OpenDSS , and ANDES , which proved to give the same results as other renowned power system analysis software. The Electrisim software is tested by numerous scenarios to verify the proper results. The Electrisim cloud runs on Railway , a platform built for production workloads. Railway is SOC 2 Type II and SOC 3 certified, publishes security and compliance details in its Trust Center , and protects traffic with TLS. GDPR-focused processing agreements and stronger enterprise controls are available for teams that need them. User-friendly graphical user interface (owing to Diagrams.net ), based on drag-and-drop functionality for creating electrical diagrams. Flexible Deployment Use instantly in your browser with our cloud software, or deploy locally on your computer for complete data privacy and offline capabilities. Community Powered Your subscription (from $10/month) directly funds ongoing development and new features. Subscribers help define the roadmap—tell us what you need and we prioritize it. Join a growing community of engineers shaping the future of open-source power system analysis tools. Design networks on a geographic map: place buses, generators, transformers and loads at real locations, draw cables between them, and generate an electrical model with automatic cable length calculation. Ideal for offshore wind, distribution and transmission planning. Inside the Software Real workflows: solver settings, harmonics, built-in templates, large-scale renewable models, post–load-flow Network Health Dashboard , multi-page Engineering Report PDF (cover, diagram, tables), and more—the same interface you get when you subscribe . Reactive power capability (PQ diagram) — compare plant Q capability at the PCC against grid-code requirements; compliance status, voltages, and CSV export. 1 GW offshore wind — full single-line view from turbines to the external grid.

Ready-made templates — start from onshore wind, offshore, or solar examples. Harmonic analysis — spectrum and total harmonic distortion (VTHD) across buses. Load flow — choose Pandapower or OpenDSS, iterations, tolerances, and exports. Add Reactive Power Characteristic to your generators Result export — export the simulation results. Code export — generate Pandapower or OpenDSS code based on the Electrisim schematic. Map editor — convert automatically your model from map to electrical model. Electrical Components in Electrisim Build any network with a comprehensive component library — available in Pandapower and OpenDSS frameworks. …plus motors, external grids, shunts, impedances, 3-winding transformers, DC lines, switches, BESS, FACTS (SVC, TCSC, SSC), and more. See the full component library → Free & Open Source Electrisim is completely free and open-source. Deploy it locally for full control, or use our cloud service. Join our community of contributors and help shape the future of power system analysis. Run Locally (Free) Deploy on your computer at no cost. Access via browser with premium features from $10/month (Company: $40/user/month). No installation needed Secure cloud storage Priority support Already a subscriber? Open the app → Contribute to the project: Frontend | Backend How Electrisim Compares Professional power system analysis without the enterprise price tag Cancel anytime • 30-day refund policy • Secure payment via Stripe Simple, Transparent Pricing Support the development of open-source power system software while accessing premium cloud features Community Edition Perfect for getting started Completely free, forever Deploy locally on your computer Full access to all algorithms Open-source code (Apache 2.0) No subscription or card required For individual engineers — support development & unlock premium features Everything in Community Edition + Cloud-based software access Secure cloud storage for models Priority email support Early access to new features Support open-source development For teams and organizations — per-seat billing with a commercial-use license. Everything in Personal Commercial-use license Per-seat billing for your whole team Choose the number of seats at checkout Centralized billing & invoicing Priority email support Why Choose Electrisim? Your subscription directly supports the development of free, open-source tools for the power engineering community. Based on proven algorithms from Pandapower, OpenDSS, and ANDES , validated against commercial software solutions. Be part of a growing community of engineers using and contributing to open-source power system analysis. Your feedback drives what we build. Subscribe and email us what you need—we prioritize subscriber requests and can often implement new functionality within a week. Frequently Asked Questions The questions we hear most often. See all FAQs → Can I cancel anytime? Yes. You can cancel at any time at Stripe Billing Portal. Your subscription stays active until the end of the current billing period — no questions, no retention calls. Do you offer a refund? Yes — we have a 30-day refund policy. If Electrisim doesn’t work out within your first 30 days, email us and we’ll refund your first payment. We’d rather have happy users than awkward charges. Do I need to install anything? No. The cloud edition runs entirely in your browser at app.electrisim.com . No downloads, no Python setup. If you prefer a local install, the Community Edition is free and fully open source on GitHub . Is Electrisim free to use? Yes. The Electrisim code on GitHub is under the Apache License 2.0, and the pandapower, OpenDSS, and ANDES engines use permissive open-source licences — all free to use, including commercially. Deploy the Community Edition locally at no cost, or subscribe to the cloud service from $10/month for a hosted, zero-setup workflow that also funds open-source development. Can I trust Electrisim's results? Yes. Electrisim uses calculation engines from pandapower (Fraunhofer IEE, University of Kassel), OpenDSS (EPRI), and ANDES (CURENT / University of Tennessee). It is continuously validated against commercial software, and has been independently verified — for example, in a master's thesis from the University of Palermo comparing Electrisim with Neplan. Explore more validation work in our Resources section. What analysis types does Electrisim support? Load flow (power flow), short-circuit analysis, arc flash analysis (IEEE 1584-2018), motor starting / voltage dip (DOL, soft-start), transient stability and eigenvalue analysis (ANDES), optimal power flow (OPF), protection coordination (beta), contingency analysis, harmonic analysis, time series simulation, reactive power capability (PQ diagram), and economic analysis — depending on the chosen engine (pandapower, OpenDSS, or ANDES). See the documentation for full capabilities and the roadmap for what's next. See all FAQs — billing, licensing, security, and more → Ready to start? Subscribe in under a minute and run your first load flow today. Cancel anytime in one click. Contact us if you need assistance with our software, have any comments or suggestions for improvement, or are interested in exploring collaboration opportunities. [email protected] Get the free example model pack + tutorial series Power system analysis made accessible. Use our open-source software for free locally, or subscribe from $10/month to support development and access premium cloud features. Pandapower docs Subscription management Copyright @2026 Electrisim. All Rights Reserved by Electrisim