The other consideration is whether you have any birds nesting in your walls or eaves. It is illegal to disturb them, so you should ensure that there aren’t any before installing panels or erecting scaffolding. Whilst house martins and house sparrows are usually obvious, swifts may not be. If they are present, the work should not be carried out – or scaffolding erected – between mid-April and mid-August.
If bats are discovered before or during a planned installation, extra consideration must be taken. A licence may need to be obtained from you Statutory Nature Conservation Organisation. Further details can be found at: Solar panels – Things to consider when planning works – Bat Conservation Trust (bats.org.uk)