Knowledge
Substance you can verify.
Not a sales brochure, but material you can scrutinise, with sources, standards and answers to the most frequent questions.
Sources and standards
Swissgrid White Paper (March 2026)
Expanding PV from around 10 to up to 40 GWp makes neither technical nor economic sense without storage. Grid costs are expected to increase by up to 100 per cent by 2050.
Download PDF (4.8 MB) swissgrid.ch ↗
“Areale und Quartiere” (ed. Gugerli, Faktor Verlag, 2024)
The reference work assigns battery storage to day-to-night balancing and hydrogen to seasonal energy storage. It reports self-consumption rates of 70 to 90 per cent for mixed-use sites operating as ZEV.
Download PDF (8.8 MB) faktor.ch ↗
Summary of the NFP “Energy” (NFP 70/71, Swiss National Science Foundation)
Recommendation 5 to policymakers and energy utilities reads, verbatim, “Implement decentralised multi-energy systems (DMES)!”. These systems enable highly efficient use of decentralised energy and help avoid costly grid expansion.
Download PDF (9.5 MB) nfp-energie.ch ↗ What this means →
SVGW Guideline H10001
The safety framework for building-integrated H₂ systems, the reference for SIA-compliant planning, co-developed by eRevo.
Download PDF (1.1 MB) svgw.ch ↗The technology behind it
Metal hydride, simply explained.
Just as a sponge absorbs water, the metal hydride absorbs hydrogen and binds it chemically within its metal lattice. The hydrogen can remain stored until the energy is needed.
The full explanation with diagram and three stepsFrequently asked questions
Safety
Why is this large-scale storage system allowed in an occupied building?
The hydrogen is chemically bound in the metal lattice, with around 97% held in solid form in the metal hydride. The system uses solid-state storage at up to 35 bar and does not require compression for storage. SVGW Guideline H10001 governs safety and permitting.
What does 35 bar low pressure mean compared to compressed hydrogen?
Conventional gas storage systems operate at 300 to 700 bar and require compression. In the metal hydride, hydrogen is chemically bound at up to 35 bar. One kilogram occupies around 20 litres compared with 310 litres in a 40 bar gas storage system, without a compressor for storage.
How is fire protection regulated?
SVGW Guideline H10001 is the basis. Co-developed by eRevo, it provides the safety framework for building integrated H₂ systems and covers risk analysis, fire protection, ventilation and explosion protection. It is also the reference for SIA-compliant planning.
Economics
When does a DMES pay for itself?
Payback periods of under 10 years may be possible under ideal conditions and without funding. The potential analysis shows how significant the levers are at your site and provides robust figures for your project.
What sources of revenue are there?
Each storage system operates in its own market. Short-duration storage serves balancing energy, intraday trading, peak shaving and ancillary services. Long-duration storage serves seasonal shifting, while thermal output supplies heat. Added to this are your own electricity tariff within the ZEV or self-consumption community, and the CO2 reduction pathway, with funding instruments potentially available from around 1,000 tonnes of CO2 per year.
What happens after 20 years of warranty?
The manufacturer guarantees storage capacity for 20 years. In practice, the storage system is designed to last several decades. If performance declines, the storage medium can be regenerated with noble gas. At decommissioning, the pure metal can return fully to the material cycle.
Planning
What requirements does a DMES need at the site?
Three things are required. First, a PV surplus, because the system must produce more electricity is consumed on site, and this surplus is what is stored. Second, a functioning water connection, because electrolysis obtains hydrogen from water. A reliable water supply is therefore a prerequisite for operation. Third, a suitable installation room with access. The Quick Check shows within a few minutes whether your site may be suitable.
In which SIA phases does eRevo come on board?
At every stage, although the preliminary study is usually the most effective point of involvement. We work within the SIA phase model, with clear interfaces to HVAC, electrical, fire protection and conformity. Where the client wants design-build, we can provide that too.
Who plans HVAC and electrical?
Your specialist planners remain responsible for their respective disciplines. Thermal integration stays with the HVAC planner, while electrical integration stays with the electrical planner. The system architecture between these disciplines is provided by eRevo.
How long does it take from the potential analysis to operation?
Potential analysis, one month. Options study, two months. Preliminary project, three months. Realisation, six to twelve months. These activities fit within your existing construction and planning processes.
Technology
What distinguishes the long-duration storage from a battery?
Batteries cover day-to-night balancing, while long-duration storage handles seasonal shifting. Metal hydride storage moves surplus summer energy into the winter, with minimal self-discharge. The hydrogen remains chemically bound in the metal lattice until needed, including over a service life of more than thirty years.
Is a hydrogen infrastructure needed?
No. Everything is produced on site. The electrolysis converts your surplus electricity into hydrogen, the storage system is installed in the building, and the fuel cell converts the hydrogen back into electricity. The system does not require transport of hydrogen or a national H₂ infrastructure as a prerequisite.
What happens at decommissioning?
The long-duration storage system works without rare earth elements and without lithium. At decommissioning, the pure metal can return fully to the material cycle. This supports circular construction in energy infrastructure too.
Documentation for your field.
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