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At Power NI we have arrangements in place where we can purchase exported electricity (electricity you generate but don't use on the premises) and NIROCs (Northern Ireland Renewable Obligation Certificates) on electricity which is generated by a renewable source. These arrangements are called the Power NI Micro Generation Tariff but we can only offer these arrangements in Northern Ireland.


Benefits of selling back

  • Generate an income
  • Free electricity
  • All in one solution
  • Environmentally friendly

2014/15 ROC update

Ofgem has issued ROCs for 3445 customers to date and Power NI has processed these payments. Customers whose ROCs have been paid will receive a statement from Power NI. We cannot guarantee timescales for ROCs being issued but we will endeavour to process payment as soon as we can once ROCs have been received from Ofgem.

There are a significant number of ROCs which have not yet been issued. This could be for a number of reasons:

  1. The readings are with Ofgem for review and we expect further batches of ROCs to be issued in the coming weeks.
  2. The readings had been sent to Ofgem for review but have been queried. Power NI are in turn asking customers for further information. This is 'work in progress'.
  3. The readings have failed Power NI’s initial checks and we have contacted customers to attempt to resolve the issue so that we can submit accurate and reliable data to Ofgem. This is ‘work in progress’.

If you are in category 2 or 3 as stated above, Power NI either has or will contact you for futher information and we will be grateful if you could respond promptly so that we can process your ROC claim with Ofgem.

Power NI changes to Micro Generation Tariff application process

From 22 May, Power NI will no longer be accepting Microgeneration Tariff applications to act as an Agent between the generator and Ofgem, to seek accreditation under the Northern Ireland Renewables Obligation (NIRO) to be awarded “ROCs” for eligible generation. If your generator is fully commissioned and you wish to appoint Power NI as Agent, we must receive your completed application pack by post no later than 21 May. Any forms which are incomplete or inaccurate will be returned.

From 22 May,  Power NI will continue to offer terms for the purchase of export electricity and associated ROC certificates claimed by the generator directly from Ofgem. A new form is available and has been circulated to all installers. However from this date, generators will have to make alternative arrangements or apply to Ofgem directly themselves in order to seek accreditation under NIRO and claim the Renewable Obligation Certificates (ROCs) under the scheme.

Ofgem has provided a useful guide to this process available here, which is aimed at generators who may be unfamiliar with how to apply for accreditation and ROC support under NIRO. Unfortunately Power NI will be unable to provide advice on getting accredited.

The reason for these changes is to ensure that generators have every opportunity of getting accredited in the fastest possible time in advance of the 1 October 2015 change in ROC support levels for new PV generators. To secure the current support level, new stations will have to commission and submit their NIRO application to Ofgem before 1 October 2015.

The change has been discussed with Ofgem, the Utility Regulator and DETI. All installers were notified of these changes on 1 May 2015, so will be well placed to advise further. The arrangements for generators for which Power NI currently acts as Agent remain unchanged.

Click here to view installer communication.


How it works

Northern Ireland Renewable Obligation Certificates (NIROCs)

The Renewables Obligation is the main support scheme for renewable electricity projects in the UK. It places an obligation on UK suppliers of electricity to source an increasing proportion of their electricity from renewable sources. A Renewables Obligation Certificate (ROC) is a green certificate issued to an accredited generator for eligible renewable electricity generated within the United Kingdom. One ROC is issued for each megawatt hour (MWh) of eligible renewable output generated. The Renewables Obligation (Northern Ireland) Order came into effect in April 2005 and the Northern Ireland Renewables Obligation (NIRO) was introduced by the Department for Enterprise, Trade and Investment (DETI).

The NIRO has been subject to regular reviews and the day to day functions of administering the NIRO are performed by Ofgem. Based in London, Ofgem is responsible for the process of accrediting renewable energy installations and issuing Northern Ireland Renewable Obligation Certificates (NIROCs) to generators.It is the owner of the generating station's responsibility to apply for and manage their own Ofgem accreditation.

From 22 May 2015 Power NI will no longer offer a service to act as agent for new generation stations.

For more information about Ofgem’s requirements then please refer to the Ofgem website. If you wish to contract with Power NI, you must agree to sell your export and NIROCs (and  other green benefits such as LECs and REGOs) associated with your installation.


Because any electricity that is generated but not used can’t be stored, it is exported back to the grid. We will pay you for the amount you export. For renewable energy generators up to 50kW, we will publish our prices for export in October each year, helping you to work out the expected income you can earn for the year ahead.  

Current prices

Power NI Generation tariff rates 2014/2015

Power NI’s Generation Tariff currently offers an annual fixed price for ROCs and export for generators up to 50kW.

Annual ROC and Export prices are approved by the Utility Regulator each year. The ROC price is subject to fluctuation each year due to market factors. The ROC price for 2014-2015 is lower than last year mainly as a result of lower ROC prices in the UK ROC market during the last 12 months as well as a lower ROC price forecast. The export price for 2014-2015 has reduced slightly because of a reduction in wholesale fuel costs.


Tariff from 1 October 2014 – 30 September 2015

1 ROC for generators up to 50kW 4.08p/kWh

Banding Level

Agent customers

Non-agent customers


(up to 50kW)

Existing Microgeneration 2 ROCs 8.16p/kWh £81.60/MWh
Wind Up to 250kW 4 ROCs 16.32p/kWh (up to 50kW) £163.62/MWh
Photovoltaic (PV) Up to 50kW 4 ROCs 16.32p/kWh £163.20/MWh
Hydro Up to 20kW 4 ROCs 16.32p/kWh £163.62/MWh
20kW – 250kW 3 ROCs 12.24p/kWh (up to 50kW) £122.40/MWh
AD Up to 50kW 4 ROCs 16.32p/kWh £163.20/MWh
Biomass Up to 50kW 2 ROCs 8.16p/kWh £81.60/MWh

 The export price for generators up to 50kW is:

From 1 October 2014- 30th September 2015:  5.10p/kWh

 If your system is over 50kW click here.


Grid connection

You must have a Grid Connection Agreement in place with Northern Ireland Electricity (NIE) in order to export to the electricity network. You can request an NIE Generator application pack (G83/G59) via the NIE website

An import/export meter must be fitted by NIE, not Power NI. If you need this meter this will be triggered by your installer completing and submitting the NIE Grid Connection Agreement. NIE will then contact you directly to arrange an appointment to change your electricity meter.



Export payments will be paid annually. Payment for export will be made by Power NI directly into your bank account; it will not appear on your electricity bill. A meter reader will continue to read your electricity meter so that a bill can be issued for the amount of electricity you have bought from your supplier. We will contact you to request the export meter reading at the end of each September. When we receive a valid export meter reading, we will arrange payment for you.

Current customers can click here for how to read your import/export meter

Renewable Obligation Certficates (ROCs)

If Power NI is acting as your Agent:

Ofgem insist that generation meter readings are taken on the 31st March each year so we will send you a reminder to ask you to take your generation meter reading at the end of March. Power NI will then send all the generation meter readings together to Ofgem at the end of May. ROCs are usually issued by Ofgem from July and Power NI will then arrange a bank transfer for the appropriate amount to all Agent customers. Payment cannot be arranged until the ROCs have been issued.

From 22 May 2015 Power NI will not be offering a service to act as an Ofgem Agent on behalf of new small renewable generators.

For new customers (From 22 May 2015) carrying out your own Ofgem / ROC administration

You are responsible for accrediting and managing your generator with Ofgem. Click here for more information. When you have entered into a contract with Power NI to purchase your export and ROCs, we will contact you to explain how to transfer ROCs from your own Ofgem account to Power NI's account. We can then arrange payment.



Enquire today

To get an application for the Power NI Generation Tariff please provide us with the following details so we can decide which application form is most appropriate for your installation.

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