Re: Radio Noise from PV System
If you are seeing a birdie about every 24 KHz, it is an indication that it is related to a 24 KHz switching frequency in the DC to DC convertor of MPPT or the current regulation of PWM, with a very sharp edge that is generating lots of high harmonics.
Originally Posted by W0SD
Some additional filtering inside the CC would be the best attack, but not really feasible without cooperation from the inverter or CC manufacturer. It is always easier to eliminate/reduce the source of the interference than to try to filter it out later. There is a tradeoff between a fast switching waveform to minimize losses in the switching element and a slower switching waveform to minimize harmonics.
Sunny Boy 3000US, 18 x BP Solar 175b panels, installed 2009.