Is it possible to live without access to mains? Hans-Olof Nilsson outside Gothenburg has gone seventeen to succeed. Winter, he finished with a fuel cell in the basement and home-made hydrogen.
– In mid-March I hit the power. It felt good.
Hans-Olof Nilsson lives in Agnesberg outside Gothenburg. In everyday life he runs a business in the wind energy industry. Alongside it he devotes all her spare time to get the new house entirely self-sufficient in electricity.
On a recent electricity bill it says 0 SEK in consumption. All electricity comes from solar panels on the large south-sloping roof and built into the façade. The electricity that is not needed temporarily storing his two hefty battery warehouse that houses 144 kWh.
The batteries, which he bought from China, stands in the basement, or technology room that Hans-Olof call it. Here is full of equipment. Hans-Olof Nilsson opens the doors to the past, a large metal cabinet that has just been delivered from a Danish manufacturer. There lurks an electrolyzer, a device that splits water into hydrogen and oxygen using electrical energy. A hefty investment.
– Some go to Åre every year with the family on vacation. This is my pleasure and great interest, says Hans-Olof Nilsson and explains that the electrolyser will he fix the electricity supply in the winter.
When not enough solar cells and batteries. Therefore they should be supplemented with hydrogen as he intends to store in a tank outside the house. The hydrogen will be produced with surplus electricity of around 15,000 kWh solar cells provide during the summer. When the electricity is not enough during the cold season turns hydrogen into electricity and heat in a fuel cell.
The delivery from the Swedish fuel cell manufacturer Powercell will take place in October. Hans-Olof Nilsson has already prepared a place in the computer cabinet where it should be.
– The first winter I will buy hydrogen so that I can size the system and determine the size of the hydrogen tank, says Hans-Olof Nilsson.
saving electricity has become something of a sport. Along one basement wall are three large tanks of hot water from the solar panels and ground source heat pump. The house has extra insulation in both the roof and the base plate. When it’s cold pre-heated fresh air through a 65 meter long culvert under the ground. All air goes through the heat exchanger before it is released.
In a corner of the basement, Hans-Olof made room for even a heat exchanger to hug the heat also from wastewater.
– There will be a bit like a competition with itself. How far can you go without compromising on comfort?
All the lights are so clear LEDs and can be programmed using the building automation system serves as the house’s brain. Screens sits here and there in the house, such as in the kitchen, so Hans-Olof can check the system while he takes a cup of coffee.
house has more smart features. The blinds are controlled by the weather station on the roof. It also ensures that the solar cells have a right angle to the sun, and it becomes frost or snow, then turns solar cells upside down to protect the surface.
– The stands I have designed myself, but it’s really the only special solution. Everything else I have bought off the shelf, says Hans-Olof Nilsson.
He is well aware that he saves on electricity bills do not outweigh what the solutions cost.
– It is not profitable, but it’s fun, he says.
But there is an ulterior motive. In time, when the prices have gone down and more people want to be eloberoende he hopes to take advantage of all the lessons and be able to work with electricity savings as a consultant.
If you have questions to Hans-Olof Nilsson? Email them to the New Technique reporters.
The answers will be published in a later article.
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