Eligibility of systems and their tariff levels depend on the date they were installed and registered
The Government has confirmed that all qualifying systems installed after 15th July 2009 will be eligible for tariffs.
Systems installed before 15th July 2009
These are not eligible for the RHI. The Government confirmed in Parliament on 16th September 2010 that it had no plans to honour pre-election pledges to allow these installations to be made eligible.
Systems installed after 15th July 2009
... will be able to join the Renewable Heat Incentive scheme if eligible, but will only get paid for any generation from the date they are registered for the RHI scheme onwards. Remember though, that you will still save on heating costs in the meantime.
The scheme is being introduced in two Phases
Non-residential systems installed from 15th July 2009 onwards
Will receive Renewable Heat Incentive payments for a period of 20 years from the date of registration. They will not be able to register until the scheme is introduced in 2011 (or sometime thereafter).
Residential systems installed from 29th July 2011 to October 2012
May be eligible to receive a Renewable Heat Premium Payment.
These systems will also receive Renewable Heat Incentive payments for a period of 20 years from the date when they register for the RHI, but they won't be eligible to do so until Phase 2 in Autumn 2012 (to coincide with the introduction of the 'Green Deal').
Residential systems installed from October 2012 onwards
Will receive Renewable Heat Incentive payments for a period of 20 years from the date of registration.