Photovoltaics is without doubt the most direct way of taking advantage of solar energy. When using photovoltaics, however, the efficiency of the various systems, and the feed-in tariffs to be expected should be kept in mind. On the one hand, the capacity of the solar modules used is important - on the other hand, the way in which these modules are used has considerable influence on their cost effectiveness.
Artur Deger | DEGERenergie
- Rigid systems originate from the beginnings of PV technology. Today, they can be found above all on the roofs of private, commercial or public buildings. In solar parks, they are being replaced by tracking systems at the same rate that word gets around among operators and investors that tracking systems work more efficiently and cost-effectively.
- astronomically-guided tracking is based on astronomical data. This means that sunrise and sunset times throughout the year are stored in the software, as well as the angle of the sun rays. The tracking systems controlled in this way align the solar modules accordingly. They do not take account of weather conditions or other parameters relevant to the energy yield, however, such as reflection effects through snow, water or light-colored rock.
- “intelligent” tracking is always oriented on actual conditions by means of light detectors. This means that the systems align the connected solar modules to the brightest, that is the most energetic, point in the sky. In this way, reflected light or diffuse light that penetrates clouds is also taken into account. DEGERenergie, world market leader in this field, has coined the term MLD (maximum light detection) for this.
- Advance costs – planning (purchasing, marketing, landscape planning), site preparations, as well as freight and logistics costs. This cost item lies below 1 percent for both parks.
- Facility-related costs – installation and assembly of systems, wiring of equipment, power network connection, installation and costs for facility surveillance (fence, alarm system, video monitoring). For a park with rigid systems this accounts for some 21 percent of costs, for a park equipped with tracking systems costs lie at 18 percent. The additional costs for the park with rigid systems are down to the fact that some 30 percent more solar modules and inverters need to be used to achieve the same yield as with “intelligent” tracking systems.
- Performance-related costs – solar modules and inverters. For a park with rigid systems these account for some 70 percent of total costs, for a park equipped with tracking systems they lie at 62 percent. The reason here is also: because of the higher yields of tracking systems, fewer solar modules and inverters are required.
- Costs for substructure – supporting structures for tracking unit, elevation, foundations. These are 10 percent of total costs for rigid systems, and 19 percent of costs for tracking systems.
This post does not have any comments. Be the first to leave a comment below.
Post A Comment
You must be logged in before you can post a comment. Login now.