Affected Systems and Earnings
In general it can be said: almost every system should be cleaned at some time during its life time. There are differences in relation to the type and severity of soiling. Systems that are situated in the proximity of sources of dirt (e.g. agriculture with stall aeration, road, train tracks ...) are usually more severely affected than others. With some systems, the self-cleaning process (rain) functions so well that soiling is so low that cleaning is only necessary very occasionally (every two to four years). Many other systems have to be cleaned every six months or even more frequently.
Details:
In the solar energy sector, Germany is the forerunner nation and therefore offers an enormous cleaning potential. Currently (as of October 2010) in Germany there are approx. 1.2 million photovoltaic systems installed with an output of 14,746 MW (Photon 10/2010). In the solar thermal energy sector, by the end of 2009 there were more than 1.2 millions solar power systems installed with an output of approx. 9 GW (MW Solar 2010). So, with more than 2.4 million individual systems, Germany currently possesses a total system area of approx. 160,000.00 m2. (The current cleaning price is about 2 €/m2).
(As well all surfaces located out-of-doors) PV and solar power systems are exposed to numerous types of dirt:
- Limescale deposits caused by incorrectly using tap water for cleaning!!
- Leaves and needles from neighbouring trees
- Sticky organic secretions from larvae from neighbouring trees
- Pollen and seeds from grasses and trees
- Rust from heaters and motors
- Dust from industrial-related air contamination
- Dust from roads and train tracks
- Dust and organic substances from stall aeration (from agriculture in general)
- Feedstuff dust from agriculture
- Growth from pioneer plants such as lichens, algae, mosses on seals and on the glass
- Insects and their remains and waste
- Bird droppings
Earnings through cleaning
Earnings through cleaning
Throughout Germany it is estimated (for all PV and solar power systems) that there is an average loss of earnings of 8%. With some systems this loss of earnings runs to 30%. That means that the systems are producing 30% less power and the customer is receiving 30% less in payments for feeding the grid. Cleaning will ensure that your customer will no longer suffer soiling-related revenue losses.
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