Horb a.N., September 10, 2013. DEGERenergies dual axis tracking systems with the patented MLD Sensor technology gain 42.9 percent more solar energy as competitive static systems at the same project site with identical specs like module layout and inverter design. This results from a comparative study by continuous measuring executed by the Fraunhofer-Instituts für Solare Energiesysteme, ISE.
During the last two years, from March 2011 till February 2013, the experts of Fraunhofer ISE compared four different PV Systems at the solar park Horb-Rexingen in Germany which has been developed and installed by DEGER. The compared systems: ground mount static PV systems, single axis trackers with MLD technology from DEGER, dual axis trackers with astronomical control and dual axis trackers with MLD* Technology. All four PV systems had the same specifications like module layout and inverter design. Due to this all four systems had the same DC name plate capacity. Part of the scope of quality monitoring was to determine the yield and the own consumption.
The most important results determined by standard method:
– Dual axis DEGERtrackers are generating a 42.9 percent higher yield than static systems.
– Dual axis DEGERtrackers are generating a 5.3 percent higher yield than astronomical controlled dual axis tracker. If we take the own consumption into account, the DEGERtrackers even have a 6 percent higher yield than the astronomical system.
– DEGERtrackers have the lowest own consumption compared to the measured dual axis astronomical tracking systems in this study.
– The generated additional yield, due to the DEGER MLD tracker, is visible both during low level diffuse light conditions and high level diffuse light conditions.
The systems in comparison
The static grounds mount installation (System1) consists of 6 single axis trackers with deactivated tracking function. Each rack has 6 modules installed. Those modules are connected in four parallel strings with nine in series connected PV modules. These strings are connected to one inverter. The PV arrays are facing south in a 30° angle.
System 2 (DEGER TOPtracker) is identical to System1 in terms of interconnection of the PV modules but with activated tracking function. These single axis tracking systems are controlled by one control system and one MLD sensor. The array is facing south in a 30° angle and the tracking takes place in single axis, east west direction.
System 3 is a dual axis astronomical tracking system with four parallel connected strings, with nine in series connected PV modules. Also this array is connected to one inverter.
System 4 (DEGERtracker 7000NT) is likewise a dual axis tracker. In this case with the MLD sensor responsible for the tracking function. Like the other dual axis tracker this array is connected with four parallel strings with nine in series connected PV modules.
Also, this array is connected to one inverter.
All systems utilize 36 Sanyo HIP-215NKHE1 modules and one SMA SMC 8000TL inverter.
Comparable data 2012
The static ground mount (system 1) was generating 9,191kWh solar energy in the year 2012. The single axis MLD system (system 2) generated 11,774 kWh solar energy in the same time and location. This corresponds to an additional yield of 28.1 percent. The own consumption of the single axis tracker was determined with 40 kWh.
The astronomical controlled dual axis tracker generated 12,647 kWh solar energy. The additional yield compared to the static ground mount system is 37.6 percent. The own consumption of the tracking system was 137 kWh.
The dual axis tracking system with DEGER MLD technology generated 13,132 kWh. This corresponds to an additional yield of 42.9 percent compared to the static ground mount system. The own consumption of the DEGER dual axis tracker was determined with 52 kWh.
Long term yield analyses confirms: MLD
technology outclass other tracking technologies
DEGER CEO Artur Deger: „Of course we are pleased that the Fraunhofer ISE study confirms our long term yield measurements and the measurements of our customers. Due to this study we now have an independent scientific proof that MLD tracking generates the highest yield of all in the field used tracking systems.
By the way: Not only that astronomical tracking system generate less solar energy, the astronomical systems need more effort as our MLD Sensors controlled tracking systems. This is because of the central processor control. All astronomical systems have to be connected to the computer via cable.
„A central computer and the inter connection between is not needed at all with DEGER MLD technology“ explains Mr. Artur Deger.“ Due to this we increase the reliability and fail safe stability which has a positive effect in regard to investment and maintenance for a solar project. Also a complete malfunction of a solar park due to a central computer breakdown is excluded with our MLD Technology“.
Pleased will also be the Environmental Minister of Baden-Württemberg, Mr. Franz Untersteller, due to the provided results. Mr. Untersteller had visited DEGER by the end of June and heard about this study during this occasion. „If Fraunhofer ISE can confirm the numbers which I have heard today, this will be good news which will suggest to use your systems“, so the Minister.
*MLD = Maximum Light Detection
Note to the editor:
Picture material is available here for downloading. Of course, this material is also available on request from Mr. Grab, phone: +49 (0) 7127-5707-10, E-mail: herbert.grab@digitmedia-online.de.
About DEGER (www.DEGER.biz):
DEGER is the leading manufacturer with the globally largest product portfolio for single and dual axis solar tracking systems. Its market position is based on the unique, patented „Maximum Light Detection“ – or MLD technology, developed by Artur Deger. It provides the possibility of increasing the yield of solar power plants by using an „intelligent“ control. The MLD-sensor thereby always aligns the solar modules with the energetically most potent point in the sky. This way MLD-guided solar systems achieve on average a 45 percent higher yield than fixed systems – in peaks this value is even considerably higher. With more than 50,000 systems installed in 51 countries, DEGER is world market and technology leader. The enterprise offers all solutions of relevance for the product – from development and planning to production and sales right up to maintenance and repair.
Nearly 400 employees currently work for DEGER at its headquarters in Horb, in its branch offices and at suppliers. The company was founded in 1999 and in 2001 was awarded with the Inventor Prize of the federal State of Baden-Württemberg for the MLD-sensor. In 2005 DEGER opened its first branch office in Spain, in 2009 branch offices opened in the USA and in Greece, in summer 2011 production started in Australia. DEGER produces in Germany, Australia, Canada and in the USA. Business is managed by Artur Deger.
You can“t always rely on the weather. But you can rely on a tracking system from DEGER.
Kontakt
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72160 Horb
+49 (0) 7451-539 14-0
sales@DEGERenergie.com
http://www.DEGER.biz
Pressekontakt:
digit media
Herbert Grab
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+49 (0)7127-570710
herbert.grab@digitmedia-online.de
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