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Frequently asked questions

Frequently asked questions

Do you have questions about picea? We have compiled the most frequently asked questions for you and answered them.

How efficient is picea?

Every storage tank has an efficiency. Efficiency means that the amount of energy with which the storage tank is filled is partly stored, but also partly produced as heat. This heat energy can often no longer be used. picea stores the energy as hydrogen. The hydrogen is produced by the electrolyzer and fills the storage. The electrolyzer has an efficiency of 70%. When the energy from the storage is needed, the fuel cell is used and converts the hydrogen into electricity and heat. The fuel cell has an efficiency between 50-60%. picea is installed in the house where electricity and heat are needed. When electricity and heat are produced in the conventional way, this produces CO2, which pollutes our environment. picea, on the other hand, uses only CO2-free solar energy and supplies both forms of energy - electricity and heat. picea is therefore highly efficient and achieves an overall efficiency of up to 90 %. This makes picea one of the best energy systems available on the market today.

Can hydrogen be stored without loss?

The perception that hydrogen cannot be stored without loss comes from the early days of the automotive industry. That's where the first hydrogen cars were built. The hydrogen tanks had to be very light. We have a stationary application with picea and use very massive steel cylinders that are very robust and leak-proof. If you have a filled storage tank from us, it takes 300 years for 1% of the storage volume to be lost.

Is it possible to use picea in the apartment building?

In order to achieve a completely self-sufficient CO2-free energy supply, the ratio between energy yield - the photovoltaic area - and energy consumption must match. In the single-family house this ratio is optimal and with picea independent power supply can be achieved. In the multi-family house, the roof area is not much larger than in the single-family house, but the number of consumers is higher. A full supply is not achievable there via the PV area on site. On the power side, it is possible to provide a system for larger consumptions with cascaded picea. On the energy supply side, these systems function ideally when used in a combination of photovoltaics and grid connection, from which regenerative energies from the grid are added. In this way, a CO2-free power supply for an apartment building is possible.