Commonwealth Consolidated Regulations Commonwealth Consolidated Regulations(1) For subsection 21(3) of the Act, the time at which a solar water heater is taken to have been installed is the day the heater is first able to produce and deliver hot water heated by solar energy.
(2) To avoid doubt, a solar water heater is taken to have been installed once only during the life of the unit.
Note: Certificates may only be created within 12 months after the installation of the solar water heater (see subsection 21(2) of the Act).