For your roof  Solar power from your roof  A sound investment
Electricity rates historically rise - they could double in ten
years. The sun, however, never sends you a bill. That means ten
years from now, the solar energy you are collecting at your own
home will still be free, while the cost of electricity from your
utility will have most likely doubled in price. The amount of
money saved with a solar installation varies based on your
electricity usage and the solar resource available to you.   In
addition, investing in your own roof combats economic crises and
opens a 'roof savings book' under favourable conditions: with a
solar power system you produce clean energy and thus receive
guaranteed returns thanks to the feed-in tariffs specified under
the German Renewable Energy Law. Whether you consume self-
generated electricity directly on site or feed into the public
grid, you will receive payment. Your solar power system thus
becomes a 'roof savings book' – assured for over 20 years.  How
solar power works