Yield Increase through Re-Engineering and Retrofit

green­tech and Solar­park Aufroth Süd GdbR reach signi­fi­cant yield increase for Solar Farm Aufroth through tech­ni­cal and com­mer­ci­al opti­mi­za­ti­on.

Solar­park Aufroth Süd GdbR com­mis­sio­ned green­tech with an inde­pen­dent tech­ni­cal and com­mer­ci­al inspec­tion for the 1.5 MW ground mounted photovoltaic-plant. Due to the inspec­tion of the pv-plant, the check of the docu­men­ta­ti­on and all current con­trac­ts impac­t­ful opti­mi­za­ti­on poten­ti­al could be iden­ti­fied.

Short-term measures

  • Main­ten­an­ce of defect fuses of the gene­ra­tor junction boxes
  • Con­ti­nuous moni­to­ring of tracker system on string level to identify issues early
  • Retrofit with radia­ti­on sensors to analyze shading of the tracker system
  • Closing of O&M contract with low basis costs and bonus agree­ment

Mid-term measures

  • Cor­rec­tion of tracker con­fi­gu­ra­ti­on to prevent shading and optimize uti­li­za­ti­on of radia­ti­on
  • Opti­mi­zing tracker control through back tracking
  • Opti­mi­zing tracker system depen­ding on season to reduce refe­rence current
  • Moder­ni­zing inver­ters through reen­gi­nee­ring (improved MPPT-behaviour through IPG Effi­ci­en­cy Kit)
  • Con­sul­ting in refi­nan­cing the project



Project Results

The re-engineering of the inver­ters results in a yield increase, espe­ci­al­ly under inco­sis­tent weather con­di­ti­ons and in the start phase of the plant. Mutual shading of the module tables is mini­mi­zed through a yield opti­mi­zed con­fi­gu­ra­ti­on of the tables. This fur­ther­ly opti­mi­zes the yield for autumn, winter and spring. The results of the opti­mi­za­ti­on measures have been docu­men­ted in detail and have been pre­sen­ted to the customer. The success of the pro­fes­sio­nal ope­ra­ti­on of the PV-plant is ensured by regular repor­ting. This con­ti­nuous­ly iden­ti­fies measures to keep the mean­while excel­lent yield situa­ti­on of the plant.

Customer Opinion

» With their tech­ni­cal and com­mer­ci­al inspec­tion green­tech iden­ti­fied signi­fi­cant weak­nes­ses of our PV-plant and deve­lo­ped sustainab­le opti­mi­za­ti­on measures. Now our long-term invest­ment is secured by the O&M of green­tech. The high fle­xi­bi­li­ty and relia­bi­li­ty of their analysis, pro­gno­sis and measures is very satis­fy­ing. We are pleased  to work with a partner on eye level.«

Hans-Jürgen Ammer, Managing Director Solar­park Aufroth Süd GdbR