Until now, the use of a house storage was coupled with the presence of a separate photovoltaic system or a different energy source. The community of the 5,000 members of the battery manufacturer Sonnen is now to be expanded: Even people in the city can get some free electricity from the community without their own green electricity system. Prerequisite: You own an apartment, so it is not for the time being tenants. Approximately 16,000 battery storage units from the company Sonnen supply 60,000 people worldwide with green electricity. "By the end of the year the number is to grow to 180,000 people," says Philipp Schröder, Sales Director at Sonnen.
New Sonnenbatterie City
How does the new model work? The new Sonnenbatterie City, for example, is installed directly in the apartment. Residents of the home receive an annual guaranteed electricity supply of 2,200 kilowatt hours for the next ten years. To this end, Sonnen is taking further savings of around 300 kilowatt hours, which are saved by the intelligent energy manager in the battery. "The new battery storage for the city costs 3,999 euros, including VAT," proclaims Schröder. Added to this is a monthly fee of 19.90 euros. The offer is, however, capped to 5,000 units. For each kilowatt hour, which exceeds the free quota, the member costs 23 cents, this price is not guaranteed.
Digitally networked power community
The highlight is that its own photovoltaic system is no longer required for electricity generation - the community takes this task, a digitally networked community of producers and consumers of renewable energies. These include, for example, single-family houses with a solar power system, solar outdoor areas, wind power plants, as well as smaller biogas plants and now also residential owners. The community supplies its members with electricity, surpluses are stored in the battery. If, in return, more is consumed than produced, the household draws the electricity directly from the battery. The Sonnenbox-Flat, an intelligent counter, forms the bridge between the battery and the control room.
2,200 kilowatt hours for free
The battery system from Sonnen also fulfills a second function: it supplies control energy from a pool of thousands of batteries, which are digitally interlinked. This will compensate for fluctuations in the electricity grid. If there is too much electricity in the electricity network, because a storm is causing a lot of wind current, it can absorb excess current. If there is too little current, it can send it back in time. The sale of control energy thus ensures that the members of the community receive yearly 2,200 kilowatt hours of electricity for free. (NHP/HCN)
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