maranden

Hi, I cannot for the love of god find out how to use the MPPT feature, despite reading through the forum and trying out the advice in PVsyst 6.022. My task is planning a power plant, I want to have one array consisting of 4 type SMA sunnyboy 8 kW inverters, each inverter having 1 string of 11 panels type sun power 327 in series. That is it. Unfortunately, this seems difficult to incorporate. I first choose the right panel, then the right inverter, then I get lost at the whole MPPT input thing. Do I really have to choose an inverter with only 1 MPPT input in order to make this task possible? Do you have any advice on how I actually configure this system in PVsyst? Sincerely, Martin Andersen

To this post I have a follow up question; Is it so that the level of the horizon corresponds to the Z value 0 in the near shading 3D scene construction? Or is the curvature of the earth taken into account? Meaning: do we assume sun height 0 degrees and the Z value 0 to be the same in the modelling? When making the 3D model, does my placement of objects in the Z direction have any influence on the shading, or is only the relative placement of objects important? Just wondering if the same result will be given if object 1 is at Z = 0 and object 2 is at Z = -5 or if object 1 is at Z = 5 and object 2 at Z = 0. Best regards, Martin

Hi, I am currently writing a master thesis analyzing the actual and forecasted power production of solar power systems in Norway. Working out the prognosis I use PVsyst. I wonder if the simulations conducted with shadings according to module layout takes into account the height of the module above ground. In my work, the modules at one site are located 5 meters above ground on a building, however, I am unsure if the simulation takes this into account. The horizon I have defined has obstacles in a sun elevation angle 6 - 11.5 degrees, measured according to ground level. However, having defined the module layout and specified the module location 5 meters above ground, the obstacle height is 30 - 50% overestimated. This mostly will effect the yield in the winter months, where sun is scarce in the north. None the less, my thesis aims at giving accurate information as to the discrepancy between forecasted yield in PVsyst and actual production. If the program takes this into account, then it's all good. On the contrary, I will have to redefine my horizon. As far as I've looked, no answer has been found for this question. I chose to contact you before defining horizons for other sites and hope that the answer might also help others. Sincerely, Martin Andersen