sirihar

Hi, I have tried to do some simulations with the SolarEdge architecture and every time this happens: After defining the system parameteres everything ("orientation", "system" and so on) turns green and I can perform the simulation. But directly after the simulation is done, the "system" box turn red and it does not turn green again no matter what I do. I have to start all over again with a new variant to be allowed to perform a new simulation... Bug? And btw: should I use the "linear function" or "according to module strings" for a simulation with power optimizers? In case of module strings: what kind of fraction for electrical effect is realistic? Siri

Hi, how does PVsyst (version 6.20) handle the fact that not all inverters are able to distinct between local and global MPPs? For exampel: OptiTrac Global peak is a MPPT/algorith implemented in new inverters from SMA. Older ones, like Sunny Mini Central 5000A, does not have this function, instead it uses a conventional MPPT which cannot "see" whether a MPP is the true (global) MPP or a local one? Operation at a local MPP will decrease the power outout from the potential output. But I am not sure how likely it is that an inverter actually will operate the system at a local MPP. It seems to me that PVsyst don't consider the issue - am I right? Best regards, Siri

Hi, I am working on a grid connected system in version 6.19. In some cases, I end up with a simulation report where the "inverter loss during operation (efficiency)" has a positive value, meaning it increases the overall efficiency of the system. From the tables I can generate after the simulation, it seems like this "input" of energy due to "inverter loss" occurs in months where the modules are heavily affected by partial shading. Can somebody please explain me how the "inverter loss" can increase the overall effiency? How is the "inverter loss during operation" calculated? Has it something to do with a reduction in loss due to an inverter which is able to perform global peak MPPT? Has it in general something to do with shading losses? Or is it a bug? I have really tried to twist my head and search in the help-manu as well in the forum, but I cannot find any answers. I would really appreciate any helpful comments. Best regards, Siri

Is it possible to perform a detailed simulation according to module layput, when using the SolarEdge inverter and power optimizers? If not: Will this be possible in the future? I'm using the version 6.19.