What makes the two fincas in the hilly centre of Mallorca near the town of Sant Llorenc des Cardassar interesting are their energy concept and the building services: Owner Peter Sievers has connected an energy storage system from E3/DC to a photovoltaic system and a diesel generator. The stationary battery consists of lithium ion batteries. With the storage system, the entire power supply in the building mains of the Finca is automatically regulated. On the sunny island, this intelligent off-grid system is a novelty for self-consumption.
The centrepiece of the building technology only requires one square metre of wall space and is forty centimetres deep. The storage capacity of the batteries in the S10 E8-H domestic power plant is up to eight kilowatt hours and the battery has an output of three kilowatts.
Like mains electricity
Up to four people are supplied at the Finca. Three kilowatts will do nicely. The photovoltaic system was set at eight kilowatts in order to harvest sufficient solar power even in bad weather and to increase the degree of self-sufficiency. A diesel generator is provided for emergencies. So far it has hardly ever been used. "For me, the domestic power plant is like mains electricity," says Peter Sievers, but admits: "I was a little sceptical at first. But in the meantime I am convinced of this system".
Always an eye on operating data – even from 1,500 kilometres away
When Sievers is in Germany and the two fincas are rented out, he can call up the system performance on his tablet PC from 1,500 kilometres away. The manufacturer E3/DC can also carry out remote maintenance if necessary and optimise the software or intervene in the event of malfunctions.
Until now, this has not been necessary. All of the important consumers in the new house are supplied with the self-generated electricity. This includes the washing machine, lighting and TVs. (HS/mfo)
A detailed description of this property and other reference buildings of solar architecture and building supply can be found in the architecture database Solar Age.
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