G4iE / DANISH ENGINEERING & INNOVATION

Complex energy.
Clear direction.

We connect system engineering, physics-based models and commercial evidence to make clean energy concepts ready for real decisions.

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Illustrative clean-energy pilot facility with process equipment

ENGINEERING × MODELLING × IMPACTIllustrative imagery

ENGINEER THE SYSTEM · MODEL THE OPTIONS · INFORM THE DECISIONDiscover G4iE

01 / ABOUT G4iE

The system view
changes everything.

G4iE — Group for Innovative Engineering — is a Danish engineering and innovation company working across the interfaces of power, heat, storage and hydrogen.

We bring technical design, electrical and thermal modelling, and economic analysis into one conversation. That helps research teams and industrial partners see trade-offs early and choose a credible path forward.

See our approach

02 / CAPABILITIES

Expertise across
the whole system.

Engineering-led, physics-based work from system concepts and evidence to pilot design and implementation support.

01 / SYSTEMS

Hybrid Energy Systems & Storage

Hybrid system integration brings together renewables, BESS (battery energy storage systems) and thermal energy storage, with grid interaction and flexibility for critical loads.

02 / MODELLING

Digital Twins, AI & Optimisation

Physics-based modelling and digital twins guide AI-assisted forecasting, flexibility modelling and optimisation of energy management and grid/consumer coordination.

03 / FUELS

Hydrogen, PtX & Renewable Fuels

Hydrogen integration and Power-to-X pathways for e-fuels, biogas and other renewable fuels, with sector coupling in view.

04 / EVIDENCE

Techno-Economic & Lifecycle Analysis

CAPEX/OPEX and LCOE/LCOH modelling, lifecycle assessment (LCA) and carbon intensity inform business cases, scenario comparison and decision support.

05 / ENGINEERING

Process, Thermal & Carbon Engineering

Concept and basic engineering, PFD/P&ID, equipment integration and technical specifications for heat pumps, waste heat recovery, district heating, solar thermal, geothermal systems and CCUS. Pilot and demonstration design, scale-up, safety and risk considerations, and implementation support.

Illustrative clean-energy campus with solar panels, storage, process facilities and wind turbines

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POWER / HEAT / STORAGE / HYDROGEN

The value is
in the connections.

Generation, conversion, storage and demand influence one another. We study those interfaces together, so a promising component becomes a workable system.

03 / HOW WE WORK

Useful answers
start with better questions.

Every assignment begins with the operating reality: constraints, data quality, interfaces and the decision the work must support.

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Frame the challenge

Define system boundaries, operating needs, assumptions and success criteria.

Compare credible options

Connect engineering models with cost and operating scenarios to reveal trade-offs.

Make the next step clear

Present the evidence, uncertainties and design choices in a form teams can use.

04 / APPLICATIONS & FOCUS AREAS

Engineering built
for application.

G4iE supports research and industrial teams with system integration, decarbonisation and demonstration planning.

Illustrative energy-storage facility with wind generation in the distance

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FROM QUESTION TO EVIDENCE

Make the next design decision count.

We help define engineering interfaces, model operating scenarios and compare designs for pilots and demonstrations. Technical, techno-economic and lifecycle evidence grounds the next implementation step.

Discuss a collaboration

01 / RESILIENCE