Solar panel array interference with DVB-T reception
You should consider moving the antenna or moving the panels to a suitable separate location.

The panels may well act as a large shield given that the panels have metallic strips in and between the cells.

If you continue with the plan of hoping a small gap will still give you tv then it may be expensive trying to sort a solution after, and the Solar company may not be prepared to help as they warned you in advance of the possible issue.