solarMax

Thanks for the clarification. It may well be that the inverters did not use the best optocouplers. Thank you very much for your support. I solved the problem in a similar way. I created a flash dump from one of the inverters where the update worked and flashed it onto the “defective” one. Now everything is working perfectly again.

Hello everyone, Unfortunately, my attempt failed in a rather strange way. I operate three converters using parallel cards so that they form a three-phase network. The update via the COM port worked without any problems for two of the three inverters. On the third, “UPG yes” appeared briefly on the display, as it did on the others. Then error F32 appeared and it was bricked. Fortunately, I have the right JTAG adapter to revive the DSP board. So, without further ado, I installed your patched FW 74.04 via JTAG and the inverter started up again. However, error code F99 now appears. I can't find a description of this anywhere. When I reinstall my old FW 74.01 via JTAG, the error does not appear and everything works normally. Can you explain this? Especially since it only affects one of the three identical converters? Interestingly, it is not possible to install the update via the COM port, even after repeated attempts. Thank you very much.

Hi Coulomb, Thank you very much. I will definitely try that and let you know how it goes.

Hello everyone, I have read several posts in the forum about a patch for inverter firmware that fixes an MPPT problem. Specifically, the tracker gets stuck at a local maximum, meaning that the maximum possible PV power is not being achieved. I am using the ISolar SV IV 5.6K. The TMS320F2809 DSP is installed. Can the attached FW be patched so that the MPPT tracker does not get stuck? Thank you for your help. V74_01 DSP FW image.hex