1. Solar Power

2. Table of contents 1)Sunbeams 2)Photovoltaics 3)Solar heat 4)Examples of photovoltaic constructions a.The bike station in Dorsten b.A private solar-equipped home 5)Future prospects

3. Sunbeams The intensity of the sunbeams is 1.367 kW /m² at the fringe of the earth’s atmosphere Ultraviolet rays go three different ways 1. reflected by nature 2. converted into thermal energy 3. arrive at the earth’s surface  ca. 0.8 - 1kW /m²  energy quantity: 1,000kWh/m²

4. Photovoltaics photo (= light) + voltaic (= voltage) Photovoltaics = the direct conversion of light into electricity Ca. 20,000 photovoltaic constructions in Germany Electricity consumption is read off by a special electric meter  46.75 cent for every kWh

5. A Photovoltaic System

6. Solar heat Solar panels collect sun beams and turn them into thermal energy  Collectors located on the roof A Solar Thermal system can provide as much as 70- 80% of your hot water needs for the year Ca. 800,000 constructions in Germany

7. A Solar heat System

8. Bikestation in Dorsten Photovoltaic construction 12,500 DM subsidied from the federal state of NRW, and from various organisations In use since May 2001 Maximum production capacity: 5.0 kW Size: 108m² (36 modules) CO 2 savings: 2,500 kg per year Electricity generation: 4,000 kWh per year = the electricity consumption of a 4-person household

9. Private solar- equipped home In Oer-Erkenschwick 29 modules (= 215 Watt) Production capacity : 6.235 kW Annual output: 5,000 kWh Subsidy: 49 cent per kWh  Annual subsidy: 2,500 €  Payback period: 14 years

10. Future prospects By 2020 :  255,000 jobs in the alternative energy industry  Turnover: up to 24 billion € By 2030:  Savings by reduced use of fossil fuels: 29 billion € annualy  CO 2 savings from 30 million tons  Export increase to 39 billion € annually