Power system analysis from $10/month

Billing & subscription

• 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.
• How does billing work?
  Billing is handled by Stripe. Personal is charged $10 (USD) every month on the day you subscribed; Company is $40 (USD) per user/month for the number of seats you choose. We never see or store your card details — Stripe handles that with industry-standard encryption and PCI compliance.
• What happens if my payment fails?
  Stripe automatically retries the payment for several days and emails you to update the card. Your access continues during the retry window. If the payment still fails, your cloud access pauses — your models are kept safe and re-activate the moment your card succeeds.
• Do I need to install anything?
  No. The Professional plan 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.
• What if I cancel — do I lose my work?
  You can export every model as a file at any time, and the Community Edition reads exactly the same format. Cancel and run your saved studies on your laptop forever — your work is yours.
• Is my data secure?
  Yes. Connections to Electrisim are over HTTPS, and Stripe handles all payment data so we never store card numbers. See our privacy policy for details.
• 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 you offer team or annual pricing?
  Yes. The Company plan is $40 per user/month with a commercial-use license — just choose the number of seats at checkout. For training, on-premise install, a custom annual contract, or volume discounts on larger teams, contact sales and we reply within one business day.
• Can I support Electrisim without cloud access?
  Yes. If you use the free Community Edition locally and want to fund development without subscribing to the online app, you can become a supporter for $5/month on Buy Me a Coffee. This is a voluntary contribution — it does not include access to app.electrisim.com or other cloud features. For the full cloud workflow, choose the Personal plan at $10/month.

General and technical questions

• What electrical systems can I analyze with Electrisim?
  Electrisim supports a wide range of electrical power systems: transmission and distribution networks, high voltage (HV), medium voltage (MV), and low voltage (LV), as well as both HVAC and HVDC. You can model and analyze large power grids with thousands of components, onshore and offshore wind farms, PV solar plants, battery energy storage systems (BESS), EV charging installations, and more.
• Does Electrisim work on Mac, Linux, or Windows?
  Yes. The cloud edition runs in any modern browser on macOS, Windows, Linux, and mobile. The open-source local version runs natively on all three platforms (Python + Flask backend, web-based frontend), including Apple Silicon Macs.
• Is Electrisim free to use?
  Yes. The Electrisim code we publish on GitHub (for example the frontend) is under the Apache License 2.0 (Apache-2.0). Calculations also use pandapower and OpenDSS, which each have their own open-source terms: pandapower is under the BSD 3-Clause licence, and OpenDSS is distributed by EPRI under a permissive BSD-style licence (the same three-clause pattern as classic BSD). All of these are permissive licences that allow free use, including commercially, subject to each licence’s conditions (such as copyright notices). You can use Electrisim without licensing fees for the software, and optionally subscribe to the cloud service for a low monthly fee if you prefer a hosted solution and want to support open-source development.
• Is Electrisim a new project?
  No. Electrisim has been in development since 2014. It builds on mature, well-established engines: pandapower (developed since 2013 by Fraunhofer IEE and University of Kassel, released in 2016) and OpenDSS (developed since 1997 by Electrotek Concepts, acquired by EPRI in 2004 and released as open source in 2008). These engines have decades of combined development and validation.
• Can I trust Electrisim's results?
  Yes. Electrisim uses calculation engines from pandapower and OpenDSS, which are developed and maintained by renowned institutions: Fraunhofer Institute for Energy Economics and Energy System Technology (IEE) and University of Kassel for pandapower, and the Electric Power Research Institute (EPRI) for OpenDSS. Electrisim is continuously validated against commercial software using our own algorithms, and has been independently verified—for example, in a master's thesis from the University of Palermo comparing Electrisim with Neplan. You can explore more validation work in our Resources section.
• Why is Electrisim so affordable compared to commercial software?
  Electrisim is designed to make professional power system analysis accessible to all electrical and power system engineers. By building on open-source engines and offering a low-cost cloud option, we aim to remove the barrier of expensive licences while maintaining high-quality, validated results.
• What analysis types does Electrisim support?
  Electrisim supports load flow (power flow), short-circuit analysis, optimal power flow (OPF), harmonic analysis, and economic analysis (CAPEX, power losses, energy losses), depending on the chosen engine (pandapower or OpenDSS). You can model generators, transformers, lines, cables, loads, renewable generation, storage, and more. We are working on adding more functionality—see our roadmap for planned features. See our documentation for full capabilities.
• Can I use Electrisim for commercial projects?
  Yes. Apache 2.0 (Electrisim’s own repositories), BSD 3-Clause (pandapower), and OpenDSS’s BSD-style terms are all permissive licences that allow commercial use, subject to each licence’s requirements. You can use Electrisim in consulting, grid studies, renewable integration, and any other commercial application without paying licensing fees for the open-source software.