Green square blog featuring current issues and information on renewable energy and its efficiency, reliability and how to make the swap to renewable energy. Information on products biomass boilers, biomass stoves, air source heat pumps, ground source heat pumps, solar PV, solar thermal.

Introducing the Renewable Heat Incentive Calculator

Green Square have now introduced a Renewable Heat Incentive calculator, serving as a personalised estimation tool to calculate your potential earnings over a seven year period with the governments Renewable Heat Incentive scheme (RHI) using a selection of renewable products.

All you need to do is complete the Calculator form and we provide you an estimate of your yearly RHI return via email. This also includes your yearly fuel saving along with the total 7 year benefit you will receive from the scheme, to give you the best idea of the financial benefit when using from with renewable boilers to heat you’re home.

The first thing you’ll need to know about RHI incentives is which category you will fall into. One category is for residential homes and properties (domestic rhi), and the other is for non domestic rhi (like industrial, commercial, public sector etc). The aim of RHI is to help the UK achieve targets of reaching (or succeeding) its goal of 12% renewable energy sources by 2020. The scheme covers England, Scotland and Wales and was launched in 2014. Tariff payments are regular payments for using particular renewable energy appliances in your property. Another great benefit of RHI is that is aims to significantly help cover costs of the installation processes involved with the renewable energy products – and provides ongoing yearly payments. You may also be interested in looking into the Feed in tariff here.

In 2016, 8.9% of total energy consumption came from renewable sources; up from 8.2% in 2015. Renewable electricity represented 24.6% of total generation; renewable heat 6.2% of overall heat; and renewables in transport, 4.5%. The UK has now exceeded its third interim target; averaged over the past 2 years, renewables achieved 8.5% against its target of 7.5%. Renewable heat has also increased by 12% due to high accounts in plant biomass and anaerobic digestion schemes supported by the Renewable Heat Incentive. RHI supported 15% of renewable heat in 2016, with a marked increase to the previous year.

2017 has also seen a great year for renewables with many targets hit! (See other blogs).

Which Renewable Products work for RHI?

All systems must also be listed on the Domestic Renewable Heat Incentive Product Eligibility List.

The current domestic RHI rates and tariffs for applications submitted between 1st July and 30th September 2017 are:

7.63p/kWh for air source heat pumps (air to water)
19.64p/kWh for ground source heat pumps
3.85p/kWh for biomass boilers and biomass (cooker) stoves
20.06p/kWh for solar thermal panels

RHI payment rates on heat pumps and biomass boilers will increase from spring/summer 2017. The government has not announced the precise date yet, but if you applied to join the RHI scheme from 14 December 2016, your tariff will automatically increase once available.

The new higher rates will be:

10.18p/kWh for air source heat pumps
19.86p/kWh for ground source heat pumps
6.54p/kWh for biomass boilers

Who is Eligible for RHI?

  • Home owners, self-builders, and landlords of private property. Registered providers of social housing with renewable technology installed can apply for RHI.
  • Strictly self build projects for new build properties
  • Applications are made for RHI within one year of your installation date.
  • You will need MCS installation certificate numbers for the system
  • The Energy Performance Certificate (EPC) number no more than 24 months old.

Heat demand limits

UK government announced ‘heat demand limits’ for heat pumps and biomass boilers this year. This will limit the amount of renewable heat which households can receive payments. Also note heat pumps installed from spring/summer 2017 onwards will need to have electricity meters fitted in order to calculate running efficiencies.

Technology Annual heat demand limit (kWh)

Air source heat pumps 20,000
Ground source heat pumps 30,000
Biomass 25,000

How much can you earn with RHI?

How much you can earn depends on your personal statistics – for example: the size of your property or business, and how much heating you require and which renewable products you choose to install.


Estimated costs of your properties heating system is calculated using the average annual heat demand for the property size and the price per kWh to the relevant fossil fuel. The estimated annual RHI payment is calculated by multiplying the average annual heat demand by the relative RHI rate for the different technologies.

Green Square take pride in our comprehensive knowledge of the renewable energy market, as well as our extensive technical proficiency and installers available. We want to be able to provide you with clear and accessible information about your preferences. To start with this, it’s best to contact us directly with any queries or questions you may have – it’s easy to contact us on our online form or you can request a call back if preferred on 033 33 707 707.