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 table shows the tariffs for each technology type from 1 April 2019. 

Tariff name Eligible technology Eligible sizes

Tariff rate 2019/20

From 1 April 2019 (p/kWh)

Small commercial biomass and municipal solid waste Commercial biomass / waste <20 kWth

Tier 1: 7.4

Tier 2: 1.8

Lower medium commercial biomass and municipal solid waste Commercial biomass / waste 20 to <100 kWth

Tier 1: 1.7

Tier 2: zero

Higher Medium commercial biomass and municipal solid waste

Commercial biomass / waste

100 to <200 kWth

Tier 1: 1.2

Tier 2: zero

Large commercial biomass and municipal solid waste Commercial biomass / waste 200 to <1 MWth 1.7
Small commercial heat pumps and deep geothermal Ground/water-source heat pumps and deep geothermal <20 kWth 10.0
Medium commercial heat pumps and deep geothermal Ground/water-source heat pumps and deep geothermal 20 to <100 kWth 5.2
Large commercial heat pumps and deep geothermal Ground/water-source heat pumps and deep geothermal >100 kWth 1.5
All solar collectors Solar collectors <200 kWth 10.1

2019 amendments to the Scheme

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. The Act also provided the Department for the Economy (DfE) with the power to offer a voluntary buy-out scheme to participants.  Further detail on the 2019 amendments is available in documents published on the consultation page on DfE’s website.  

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.

Additional actions

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.

Further advice

If you need further advice, please contact Ofgem's dedicated RHI enquiry line:

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