In many cases installing solar panels on non-domestic land is likely to be considered 'permitted development' with no need to apply to the council for planning permission. There are, however, important limits and conditions which must be met to benefit from the permitted development rights (see below).
Non-domestic land for the purposes of these permitted development rights is broad and can include businesses and community buildings. Permitted development rights are also available for domestic properties, details can be found here.
You may wish to discuss with the local planning authority for your area whether all of the limits and conditions will be met.
Disclaimer - Wales
This is an introductory guide and is not a definitive source of legal information. This guidance relates to the planning regime for Wales. Policy in England may differ. If in doubt contact your Local Planning Authority.