Duration and variations
The tariff levels are index-linked so they will track the retail price index
The tariffs last 20 years for almost all of the systems, with the exception of solar PV (25 years for systems installed before 1st August 2012) and micro-CHP (10 years).
Is the tariff fixed for this whole period?
Yes - once you start at a given tariff, it is guaranteed for the full period shown above and is index linked.
See the details of RPI-related indexation here.
Do the tariff levels ever change?
For those who are already registered, tariffs will only change in accordance with the index-linking described above
For future entrants who are not yet registered, tariff levels can change:
- Subject to the through 'degression', according to the principles here and practice here, and
- When the scheme is reviewed - originally expected every five years, but has been more frequent in practice.
How long does the scheme last?
In theory, therefore, a PV installation registered on that date would receive tariffs until 31st March 2046!