Projects & validation

Proven in operation, sought after in planning.

World first

Eich LU

The world's first building-integrated DMES plant

since April 2024

at full load, visits possible

Detail of the plant in Eich — The reference plant inside an occupied building.

Since April 2024, the world's first building-integrated metal hydride DMES plant has been running at full load in Eich. In everyday operation it proves what was previously only a concept. Surplus electricity is stored as a solid at 35 bar and comes back as electricity and heat, quietly, compactly and in the middle of an inhabited environment. The plant supplies operating data, design values and the referenced safety concept in accordance with SVGW H10001.

Storage

H₂ in metal hydride: 480 kWh
Battery: 28.8 kWh
Total electrical: 508.8 kWh
Total thermal: 250 kWh

Power

Electrolysis: 7.2 kW
Fuel cell: 8 kW
Thermal management: 4 kW

For Proof in real operation. The reference plant proves the principle; the Triewald INDUSTRY and AREAL reference designs scale it.

Request a reference visit

The product range

From 16 megawatt hours in the plant room to over 100 for the entire site.

The same technology in two sizes. From the individual business to the energy centre for an entire neighbourhood. Every plant is dimensioned specifically for the project; the figures below show typical reference designs.

One plant room

up to 16 MWh

Storage capacity in a single room inside the building, with no outdoor space required.

One site

over 100 MWh

Storage capacity as an energy centre for the neighbourhood, available seasonally.

Triewald INDUSTRY

Integrated system for commerce, industry and sites

up to 16 MWh

Storage capacity in a single plant room

Isometric view of the Triewald INDUSTRY in the plant room — All components in one room, with no outdoor space.

Floor plan of a plant room with Triewald INDUSTRY — Floor plan with electrolysis, storage and fuel cell.

The energy centre for a building or a business, made up of electrolysis, metal hydride long-duration storage, fuel cell, battery and thermal management, integrated like a plant room. It stores the summer surplus across the seasons and delivers electricity and heat back when both are needed.

Storage

H₂ in metal hydride: 5.76 MWh
Battery: 200 kWh
Total electrical: 5.96 MWh
Total thermal: 3.5 MWh

Power

Electrolysis: 120 kW
Fuel cell: 250 kW
Thermal management: 150 kW

For Commercial and industrial operations, individual sites and larger properties. The table shows a reference configuration; the same room can be expanded to 16 MWh.

Triewald AREAL

Integrated system as an energy centre

over 100 MWh

Storage capacity for an entire district

Floor plan of a Triewald AREAL system, 7 by 12 metres — One system measures 7 × 12 metres, 84 m² footprint.

The energy centre for the whole neighbourhood, made up of four identical systems, orchestrated together by Energy Intelligence. Each system combines electrolysis, 27 metal hydride storage units and two fuel cells. A single centre therefore supplies a district across the seasons, with electricity and heat, and acts as a buffer node between local production, consumption and the grid.

Storage

H₂ in metal hydride: 81 MWh
Short-duration storage: 20 MWh
Total electrical: 101 MWh
Total thermal: 29 MWh

Power

Electrolysis: 1.2 MW
Fuel cell: 2 MW
Total electrical: 12 MW
Thermal: 1.2 MW

Four identical Triewald AREAL systems side by side — Four identical systems, controlled together. 336 m² in total.

For Neighbourhoods, large sites, district heating networks and utilities. Four identical systems with up to around 4,900 kg of hydrogen, footprint 84 m² per system, 336 m² in total.

About the storage figures All figures refer to a full cycle, i.e. the energy volume of a fully charged system. Over the course of a year, 20 to 60 cycles are run, so the usable energy volume accumulates accordingly. This applies to all three systems on this page, for Eich, Triewald INDUSTRY and Triewald AREAL.

Why Triewald

No other large-scale storage system is allowed where Triewald stands.

Everything these systems can do, at a glance. Two unique features no other product on the market offers, and a dozen reasons why the business case adds up.

The only

large-scale storage system allowed inside an occupied building.

Large-scale battery storage fails twice over in urban settings, outdoors on noise and objections, indoors on fire load and permits. Triewald sits in the plant room. Quiet, with no fire-load issue, right inside the building.

The only

H₂ storage technology allowed inside buildings under SVGW Guideline H10001.

SVGW Guideline H10001 is the safety framework for building-integrated hydrogen systems, co-developed by eRevo. It governs risk analysis, fire protection, ventilation and explosion protection, and is the basis for permits and SIA-compliant planning. Whoever helps write the standard defines the market.

The largest amount of energy in the smallest space.

One kilogram of hydrogen takes around 20 litres in metal hydride. In a 40 bar gas store it takes 310 litres. Even against a 300 bar pressure vessel it remains three times more compact, without compression.

One hundred per cent usable. Not eighty.

The stored energy can be released in full. Batteries are never fully discharged in order to protect the cells, so part of the capacity you paid for stays permanently unused.

A footprint that wins every comparison.

84 square metres per system. Four of them deliver over 100 MWh of storage capacity for an entire site, on the area of one corner of an underground car park.

Zero self-discharge. Even after months.

The hydrogen is chemically bound in the metal lattice, with around 97 per cent present as a solid. Summer power stays until January exactly where it belongs, in storage.

Power and heat from a single system.

Over 75 per cent overall efficiency in coupled operation. The fuel cell supplies waste heat at up to 70 degrees, and the electrolysis supports the hot water preparation as early as summer.

The most compact heat storage as well.

Because the energy sits in the molecule, conventional water tanks need many times the volume for the same amount of heat.

On request, lights on when the grid goes down elsewhere.

On request we design the system to be black-start capable, so it keeps supplying the building it stands in during a grid outage. Because the long-duration storage holds the energy, autonomy lasts for days instead of hours. The plant in Eich is built that way.

No lithium. No rare earths.

All materials are available in Europe, and 80 per cent of the production chain sits in Switzerland. At decommissioning, the pure metal goes fully back into the material cycle.

Over 30 years of service life.

Performance guarantee of up to 20 years on the metal hydride storage technology. If output declines after decades, the storage is regenerated with noble gas instead of replaced.

Four revenue streams instead of one.

The short-duration storage serves the fast electricity markets, the long-duration storage the season, the heat the district network, the flexibility the balancing market. Orchestrated by Energy Intelligence.

No single point of failure.

Main components are interchangeable across manufacturers. Series-produced industrial components from leading manufacturers instead of prototypes.

From 0.5 to over 100 MWh.

Modularly scalable from 0.5 to 16 MWh in a single room and over 100 MWh across the site. Same technology, same permit logic, same control system.

In real-world operation since April 2024.

No pilot promise. The plant in Eich LU runs at full load and delivers operating data, design values and a referenced safety concept. Site visits possible.

We take out complexity and bring in economic viability.

How the technology works

Sought after in planning.

Studies and consulting mandates, clearly separate from the plant that has been built.

SFP-Areal Root

Study with Integral Design Build on integrating a DMES into a mixed-use site.

Halter Gruppe

Advisory mandates for site and high-rise projects.

Kanton Luzern

Study and advisory mandate.

What does a DMES earn at your site?

Start Quick Check