Tariffs for installations
The table shows the tariffs for each technology type from 1 April 2020.
|Tariff name||Eligible technology||Eligible sizes||
Tariff rate 2020/21
From 1 April 2020 (p/kWh)
|Small commercial biomass and municipal solid waste||Commercial biomass / waste||<20 kWth||
Tier 1: 7.5
Tier 2: 1.9
|Lower medium commercial biomass and municipal solid waste||Commercial biomass / waste||20 to <100 kWth||
Tier 1: 1.8
Tier 2: zero
Higher Medium commercial biomass and municipal solid waste
Commercial biomass / waste
100 to <200 kWth
Tier 1: 1.3
Tier 2: zero
|Large commercial biomass and municipal solid waste||Commercial biomass / waste||200 to <1 MWth||1.8|
|Small commercial heat pumps and deep geothermal||Ground/water-source heat pumps and deep geothermal||<20 kWth||10.3|
|Medium commercial heat pumps and deep geothermal||Ground/water-source heat pumps and deep geothermal||20 to <100 kWth||5.4|
|Large commercial heat pumps and deep geothermal||Ground/water-source heat pumps and deep geothermal||>100 kWth||1.6|
|All solar collectors||Solar collectors||<200 kWth||10.4|
Scheme amendments 2019
The Northern Ireland (Regional Rates and Energy) Act 2019 introduced a new set of tariffs for all small and medium sized biomass boilers accredited to the scheme.
Further detail on the 2019 amendments is available in documents published on the consultation page on DfE’s website.
Voluntary buy-out arrangements 2019/2020
The 2019 Act provided the Department for the Economy (DfE) the power to offer voluntary buy-out arrangements.
The window for applications for the 2019/20 voluntary buy-out arrangements for non-domestic RHI scheme participants with small and medium sized biomass installations (up to but not including 200kW) closed on 8 November 2019.
More information can be found at Guidance for applicants to the Non-Domestic RHI VBO Arrangements
The 'tiered' tariff system
This ‘tiered’ tariff structure operates on a 12 month basis, starting with an installation’s date of accreditation or its anniversary.
During this 12 month period, the initial amount of heat generated by the installation running at its installation capacity for 1,314 hours will be paid at the higher Tier 1 tariff.
Any further heat generated during this 12 month period will be paid at the lower Tier 2 tariff, up to a maximum of 400,000kWhth.
On the first anniversary of the date of accreditation after 1 April 2019, the amount of generated heat will be taken to start again from zero and the tiered tariffs will be applied until the next anniversary of the installation’s accreditation or a further change in the legislation.
Meter readings and payments
You must continue to submit meter readings so that the following year’s payments can be calculated accurately.
When you submit your meter readings each quarter, Ofgem can determine how much heat you have generated cumulatively over the 12 months since your anniversary date.
Ofgem will tell you via a message on the RHI Register if you have reached your 400,000 kWhth cap based on your submitted meter readings and pay you for all eligible heat output up to this cap.
If you have generated more than the 400,000kWhth cap in the relevant year and been paid for it, you will receive no further payments up to your anniversary date.
However you must continue to submit meter readings even after passing this cap.
No additional action is required at present; you should continue to submit your meter readings and comply with your ongoing obligations as usual. If any additional information is required you will be contacted directly.
For queries on the voluntary buy-out arrangements:
- email: RHIVBO@economy-ni.gov.uk
Or, you can write to:RHI VBO Team
For further general advice, contact Ofgem's dedicated RHI enquiry line: