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.

Do I need to install anything?

No. The cloud edition runs entirely in your browser at app.electrisim.com. No downloads, no Python setup. The Community Edition is free and open source on GitHub if you prefer a local install.

Is Electrisim free to use?

Yes. The Electrisim code on GitHub is under the Apache License 2.0. Deploy the Community Edition locally at no cost, or subscribe to the cloud service from $10/month.

Can I trust Electrisim's results?

Yes. Electrisim uses calculation engines from pandapower, OpenDSS, and ANDES, is continuously validated against commercial software, and has been independently verified against Neplan in a master's thesis from the University of Palermo.

Yes. The Electrisim cloud runs on Railway, which is SOC 2 Type II and SOC 3 certified and publishes its security details in its Trust Center. All traffic uses HTTPS (TLS), and Stripe handles payment data, so we never store card numbers. GDPR-focused processing agreements and stronger enterprise controls are available for teams that need them.

New in 1.22 Plant Supervisory Controller →

Power system analysis software in your browser

Load flow, short circuit, arc flash, harmonics and transient stability on the open-source engines pandapower, OpenDSS and ANDES. Independently validated against commercial tools, without the enterprise license.

Try the editor free

No signup needed to explore the editor. You only pay to run cloud simulations. See pricing

Open source (Apache 2.0)
Cancel anytime
30-day refund policy

Electrisim editor showing the single-line diagram of a 1 GW offshore wind farm with a 100 km grid connection — 1 GW offshore wind model and the Network Health Dashboard after a load flow

Network Health Dashboard after a load flow, listing maximum loading, violations and the most loaded equipment — 1 GW offshore wind model and the Network Health Dashboard after a load flow

Analysis Capabilities

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 taps and shunt steps, plus Park and Plant Supervisory Controllers that hold Q, voltage or cos φ at the point of connection

Independently Validated

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.

Read pandapower's validation process →

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.

Read the full validation study →

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.

Read the dual-solver validation article →

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.

Watch the comparison tutorial →

Popular guides and free tools

Open Source on GitHub

Electrisim is built on three widely adopted open-source power system engines. Download totals:

pandapower

3M+

PyPI downloads worldwide

Source: PyPI download stats

OpenDSS

200K+

downloads worldwide since 2008

Source: EPRI

ANDES

370K+

PyPI downloads worldwide

Source: PyPI download stats

How It Works

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

Pick a study from the Simulate menu and click Run. Results appear on the diagram and in tables, ready to export.

Inside the Software

Screens from the app: the same interface you get when you subscribe.

Reactive Power Capability PQ diagram: net Q at PCC versus active power with grid-code envelope and capability curves

Reactive power capability (PQ diagram) — compare plant Q capability at the PCC against grid-code requirements; compliance status, voltages, and CSV export.

Single-line diagram: 1 GW offshore wind farm and grid connection

1 GW offshore wind — full single-line view from turbines to the external grid.

New diagram dialog with renewables templates

Ready-made templates — start from onshore wind, offshore, or solar examples.

Harmonic analysis results: voltage spectrum and VTHD by bus

Harmonic analysis — spectrum and total harmonic distortion (VTHD) across buses.

Load flow parameters: Pandapower and OpenDSS options

Load flow — choose Pandapower or OpenDSS, iterations, tolerances, and exports.

Add reactive power characteristic to generators

Add Reactive Power Characteristic to your generators

Pandapower text export: line flows, loading, and transformer results

Result export — export the simulation results.

OpenDSS script generated from the Electrisim single-line diagram

Code export — generate Pandapower or OpenDSS code based on the Electrisim schematic.

Map editor: place turbines and cables on a geographic map, then generate the electrical model

Map editor — place equipment at real locations, draw cables and generate the electrical model with cable lengths from the map.

How Electrisim Compares

Professional power system analysis without the enterprise price tag

Feature	Electrisim	Commercial Software
Monthly Cost	$10/month (Personal) $40/user/month (Company)	$500 or more/month
Load Flow Analysis
Short Circuit (IEC 60909)
Arc Flash Analysis (IEEE 1584-2018)
Motor Starting / Voltage Dip
Transient Stability (ANDES TDS)
Eigenvalue / Small-Signal (ANDES)
Protection Coordination Study (Beta)
Optimal Power Flow
Harmonic Analysis
Economic / CAPEX Analysis		Varies
Reactive Power Capability (PQ at PCC)		Varies
Open Source
Cloud Access (No Install)
Desktop version
Geographic Map Editor		Varies
Cancel Anytime

Simple, Transparent Pricing

Support the development of open-source power system software while accessing premium cloud features

Secure payments via Stripe Cancel anytime in 1 click No setup fees 30-day refund policy

Community Edition

Perfect for getting started

^$0 _{/ month}

Completely free, forever
Deploy locally on your computer
Full access to all algorithms
Open-source code (Apache 2.0) on GitHub: frontend and backend
No subscription or card required

Get Started Free

Online simulation

Personal

For individual engineers who run studies in the cloud

^$10 _{/ month}

Everything in Community Edition +
Cloud-based software access
Priority email support
Early access to new features
Support open-source development

Company

For teams and organizations — per-seat billing with a commercial-use license.

^$40 _{/ user / month}

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

Need a custom contract? Contact sales

Academic

Academic license for students, teaching, and research.

^$40 _{/ institution / month}

Everything in Personal
For students, teaching, and research
Multiple users can work in the same account at the same time, building models and running simulations
Cloud-based access, no install
Priority email support

Frequently Asked Questions

The questions we hear most often.

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.
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.
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.
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.
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.
Yes. The Electrisim cloud runs on Railway, which is SOC 2 Type II and SOC 3 certified and publishes its security details in its Trust Center. All traffic uses HTTPS (TLS), and Stripe handles payment data, so we never store card numbers. GDPR-focused processing agreements and stronger enterprise controls are available for teams that need them. See our privacy policy for details.

See all FAQs — billing, licensing, security, and more →

Power system analysis software in your browser

Analysis Capabilities