Renewable Energy Storage Portal Page

  • FCM Partners

  • Proton
    Manufacturer
  • EscoVale
    Consultancy
  • Dantherm
    Systems Integrator
  • Logan
    Consultancy, Distributor / Agent, Engineering
  • Fronius
    Manufacturer, Systems Integrator

Early markets:

Stationary

Transportation

This portal page aggregates news, information, companies, products, services and business opportunities relevant to renewable energy storage.

One of the greatest challenges in utilising renewable energy (including solar and wind) is managing the balance between supply and demand the wind does not always blow and direct sunlight is not always available. Traditionally, excess electricity is stored in batteries, but batteries have a finite storage capacity. Combining renewable energy with and electrolyser and hydrogen storage technology, enables much greater volumes of energy to be stored as hydrogen. This hydrogen can then used in a fuel cell or internal combustion engine to generate electricity. A similar configuration can also be used to provide an onsite supply of hydrogen for stationary and transport applications.

Electrolysis in general has the advantage over batteries of enabling separation of the storage medium from energy harvest and generation. Batteries have to be sized for peak load needs, while electrolyzers can be sized for average load, since storage is not coupled. Combined with the higher energy density of hydrogen vs. typical battery materials, the energy density is substantially higher, reducing cost. Rechargeable batteries also require substantial controls in order to avoid overcharge and other unsafe conditions. PEM-based water electrolyzers in particular have advantages over both batteries and other competing electrolysis technologies in operational safety and energy density. Alkaline-based electrolyzers do not scale down well to smaller sizes because of the KOH that has to be managed in the system. An alkaline unit therefore takes up 2-4 times the physical footprint of a PEM unit with the same generation capacity of 65 kg H2/day. Alkaline electrolyzers also require a prolonged start-up and shut-down period which cannot be circumvented; alkaline electrolyzers cannot tolerate turn down below 50% capacity due to excessive cross cell diffusion and resultant hazardous gas mixtures. In contrast, PEM electrolyzers have excellent load-following capability.

There are a number of companies developing solutions for renewable energy storage worldwide and there are a number of opportunities and products for companies looking for renewable on site hydrogen supply.

These include:

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