Renewable Heat Incentive for non-domestic customers
The non-domestic Renewable Heat Incentive (RHI) scheme was suspended to new applications on 29 February 2016.
Tariffs for installations
The following table shows the tariffs for 2020/21 and 2021/22*.
2020/21 Tariff Rate
2021/22 Tariff Rate
Small commercial biomass and municipal solid waste
less than 20 kWth
Lower medium commercial biomass and municipal solid waste
20kWhth and above & less than 100kWth
Higher medium commercial biomass and municipal solid waste
100kWhth and above & less than 200kWth
Large commercial biomass and municipal solid waste
200kWhth and above & less than 1MWth
Small commercial heat pumps and deep geothermal
< 20 kWth
Medium commercial heat pumps and deep geothermal
20 < 100 kWth
Large commercial heat pumps and deep geothermal
> 100 kWth
All solar collectors
< 200 kWth
*The scheme and certain tariffs are under review.
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 gave 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 give meter readings so that the following year’s payments can be calculated accurately.
When you give your meter readings each quarter, Ofgem can work out 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 get no further payments up to your anniversary date.
However you must continue to give meter readings even after passing this cap.
No additional action is needed at present; you should continue to give your meter readings and keep to 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 more general advice, contact Ofgem's Renewable Heat Incentive enquiry line