Energetica India Magazine -October 2020

SOLAR POWER d. Inverter Clipping Loss : Calculation of generation loss due to clipping this can be helpful to check for overload con - sideration. All these points above can be used to evaluate design standards. Panels: a. Temp loss : Temperature adjusted DC generation should be calculated and plotted to verify temperature co-effect of panel at site level and at band / Module level across geographic location. This will help in identifying correct tem- perature coefficient which can be adjust - ed for future projects assumption. b. Degradation Calculation : By adjust - ing temperature and irradiation across geography one can compare generation difference YoY to estimate degradation on string level. By comparing multiple strings of same and multiple sites one can determine need of thermal scanning and true degradation. Above mentioned KPI should be checked at multiple location level to ver - ify the quality of panel that is supplied. Inverter: a. Inverter Efficiency : By checking Ra - tio of DC inputs with AC output we can check the efficiency. b. Temperature loss : Checking drop- in efficiency against a rise in temperature to check on temperature loss. c. Resolution Time : Average time to re - solve the issue once the ticket is raised for a particular inverter make. d. Meantime between Inverter fail- ure : Mean time between inverter getting failed. e. Daytime to inverter work time: Ratio of total day time against inverter running time. Above mentioned, KPIs should be checked at multiple location level to ver - ify the quality of inverter that is supplied. O&M Team: a. Soiling Loss : Ratio of Temperature and irradiation Adjusted Specific hourly generation before and after cleaning. Based on this ratio cleaning cycle can be calculated. b. Average Resolution time : Average resolution time once breakdown ticket is raised, one can also create a weighted average based on the severity. The above mentioned KPIs should be check based on O&M Team/employee to evaluate team/ employee To conclude with we, at Artha Energy Re - sources, believe that asset management is not a one man’s job. It’s a collective effort of people working in the company, site data is actual truth, not datasheets, excel and simulation. Hence, we have listed some of basic matrix that an asset manager should track. To prosper as a developer, we need to know how various technical and non-technical parts are functioning on real time basis vis-a-vis our estimates. Feedback needs to be incorporated during the design phase it- self. Only then can we genuinely ensure our plants are designed with the highest levels of accuracy and be able to guar- antee generation to our consumer and returns to our investor and be able to live up to those guarantees without payment of any penalties. 37 energetica INDIA- October_2020