The report by planning officers recognised the monument as “one of the finest of its type in Scotland and very important in terms of the period in history it represents”.
It said the area was “the second densest concentration of (bronze age) rock art in Scotland (after Kilmartin Glen in Argyll) and therefore of national significance”.
Despite this Historic Environment Scotland gave no objection to the project – after an initial holding objection.
The preservation body said given the 250m distance from the monument and the solar panel height and position, the project did not raise “historic environment issues of national significance.”
However, the construction of the farm will not be able to start until an investigation has taken place and been signed off by the council.
Although there was no reason to object on “heritage grounds” the council archaeologist said ground examinations should take place to explore potentially undiscovered archaeological features of the area.