JOEN THE FUTURE

Your energy decision. Your model.

Open-source energy modelling, tailored to your specific problem. Without the software paywall.

Commercially permissive open-source licence. Public release forthcoming · Early-access enquiries welcome.

Joint Optimisation of Energy Networks

ONE PLATFORM. WHOLE SYSTEM.

Generation & transmission
capacity expansion

Energy budgets &
constraint decomposition

Unit commitment &
economic dispatch

LT STAGE

Run configuration

Current run values

CHRONOLOGY
Run chronology

chronological blocks · resolved from run

Run-specific stage · library unchanged

Execution

Whole horizon

Rolling · commit 6 year + 0 lookahead

Solver

gurobi

LT → MT
Capacity ledger · Constraint accounts
Handoff · v1
MT STAGE

Run configuration

Current run values

CHRONOLOGY
Run chronology

chronological blocks · resolved from run

Run-specific stage · library unchanged

Execution

Whole horizon

Rolling · commit 1 year + 0 lookahead

Solver

highs

MT → ST
Constraint accounts · Battery state of charge · Hydro reservoir volume
Handoff · v1
ST STAGE

Run configuration

Current run values

CHRONOLOGY
Run chronology

native · resolved from run

Run-specific stage · library unchanged

Execution

Whole horizon

Single solve

Solver

highs

01 / CONNECTED

LT → MT → ST

One platform.
Whole system.

02 / OPEN

Free & open source

Bespoke.
Tailor to your problem.

03 / FLEXIBLE

Desktop, cloud, HPC

Choose where
you run.

04 / UNCERTAINTY

Built for real studies

Large-scale planning
to repeated simulations.

01 / FULL-SCALE PLANNING

AEMO ISP 2026. Modelled with JOEN.

Explore JOEN’s capacity and generation pathways against matched AEMO references. Three scenarios. One open modelling foundation.

Explore the capability

From the energy system to your portfolio.

02 / Energy Market Model

Demo

Planning to dispatch.

Follow investment, coordination and operation in a simplified Australian energy market model.

03 / Customised Portfolio Model

Portfolio

Your portfolio. Your trade-offs.

Explore load profiles, hedge choices and cost-risk objectives in a tailored JOEN application.

ThetaFlux × JOEN

And when the future changes?

Connect evolving uncertainty to system decisions.

Explore ThetaFlux
FROM THESE RESULTS TO YOUR DECISION

What do you need to model?

Build on JOEN’s open foundation. DecisionSigma can help with migration, validation and customisation.