Once had a REIN job, that the engineer who raised the case commented he could hear extreme 'Noise' coming from a house approximately 10 houses up from the complaining EU. The only one with solar panels on the roof.
Myself and another engineer visited a few days later, and at first thing in the morning (0800). It was perfectly quiet wherever we drove around the estate. Then about 1030, boom !!! The 'Noise' on the van radio was deafening, and right outside the house the previous engineer had mentioned in his notes.
By now the lady of the house was home and she put us in touch with her husband. turned out he was some electrical genius who fully understood what I was trying to convey. But, he was adamant it would not be broadband service affecting 'Noise'. He told us that the cells (Solar Panels) have to gather up x amount of energy, before the inverter kicks in (The boom we heard at about 1030) and starts to supply the National Grid.
How much of that is true about the cells/inverter/supply ..... I don't know ..... but the Spectrum Analyser showed us that it was indeed non-service affecting 'Noise' with regard to ADSL. Turned out the complaining EU needed a new D-side ....
.
JGO is the man, the myth, the legend on this subject ...... and his comments above would concur with what we found. I've only ever had that
one occasion to suspect solar panels as a source of REIN, based on another engineers viewpoint.