There are many regulations that apply to the design, supply and installation of renewable energy Systems. A few of the most pertinent are shown below.
Applies to the conservation of heat and power in all new build, extensions and existing dwellings. Particularly affects replacement of hot water storage vessels and accompanying controls. All solar water heating work normally involving additional hot water storage is therefore notifiable to a building control officer unless a competent person can self-certify and issue a commissioning certificate. Requires minimum levels for insulation, time and temperature controls for hot water storage. Also, water storage vessels to have a minimum performance. A commissioning certificate is required to be left. Note that different rules apply in Scotland and Northern Ireland.
Applies to hygiene in buildings, particularly unvented hot water storage. Requires only competent operatives should install such certified equipment along with associated safety equipment.
Applies to any electrical work that involves adding new circuits to dwellings and any work in special locations such as kitchens, bathrooms, swimming pools and photovoltaic power. A competent person must do the work and notify to a building control officer unless the person can self-certify. There are certain exceptions; it is permitted to add or replace outlets to existing circuits in non-special locations. All work should comply with, and further details may be found, in BS 7671..