Home solar systems
I promised to tell you more about our use of solar energy. After having re-build our house last year we now make us of solar energy in 3 ways:
* Solar cells for 220 Volt on-grid electricity
* Solar panels for heating water combined with floor heating
* Passive heating through a huge thermo glass area facing south.
First we got the photo-voltaic cells. Our roof is perfect for this, facing south in an angel of 45. The disadvantage of this system is the price, but in 2003 we got selected for a project called “Sun 2000″ in which different organizations and state subsidies paid 60 pct. of the total price. Our price was about 6.000 euro, but what really made this project interesting from a financial perspective was the agreement with the local power company: The system is build to produce 220 V and it is connected to the grid. Normally if you produce electricity for the grid you will only get paid the basic price pr. kW. But when you buy you will have to pay the basic price plus taxes. Since the taxes make about 3/4 of the power bill this would not be interesting for at all. Instead we now can sell power at the same price as we buy as longs as we produce less than we use pr. year. This is great because the system produces about 1/3 of our total power consumption. The system is build of 6 BP panels at 170 WP each which will produces about 800 - 1000 kWh/year. To generate 220 V for the grid and our own use we have 1 Fronius micro inverter. This is no in longer in production, but has been replaced by a new series of Fronius inverters, the IG series. Read the rest of this entry »
I am having a meeting with the Danish company EC-Power in a couple of days. They had seen some of my articles in Berlingske Tidende about renewable energy and thought I might be able to help doing some PR for their products. This post is not to promote EC-Power, but I find their products and approach very promising.
