Radio Frequency Interference
My neighbour installed a 3-ph grid-tied 5kW solar system. No optimisers just 17 x 300W panels and 3 phase inverter. I wasn't home the day the system was commissioned but on day 2 I found the system generated significant radio interference for most of the day. In character the interference was broad band similar in character to that produced by HV line insulators tracking.
I got hold of some DC input cable and AC output 5 core with a plan to make some common mode chokes. Meantime the interference has reduced day by day to the point where with a yield of 40-50kWh/day it now makes only very occasional interference.
I am puzzled by the changes in behaviour and wonder whether someone with more solar experience might have an answer? Do MPPT systems learn, initially going through a process of load variation under varying illumination conditions to generate a profile suited to array characteristics? Or has something in the inverter been arcing and now stopped?
0 · Share on Twitter