The system performs calculations on the data that you report for each fuel type to determine your total energy consumption and track your performance.

TFC & TPER explained

Your organisation's energy consumption can be expressed as total final consumption (TFC) or total primary energy requirement (TPER). You enter data into the M&R system in TFC but the system tracks your performance using an EnPI based on TPER.

Total final consumption (TFC)

TFC is the energy consumption recorded on meters and and bills.

Total primary energy requirement (TPER)

TPER is a measure of your energy consumption that also accounts for the energy that is consumed and/or lost beyond the boundary of your organisation, notably in generating and distributing the electricity that you use.

Why M&R uses TPER

A more complete measure of energy use

TPER gives a more complete measure than total final consumption of the impact of the individual public body and the public sector as a whole on energy use and on energy-related CO2 emissions.

Aligned with policy & legislation

The targets set out in national and European policy and legislation are in primary energy.

Gives organisations credit

TPER implicitly gives organisations credit for reducing electricity system losses for ‘Ireland Inc.’ when they implement certain onsite electricity generation systems, e.g. CHP, auto-generating wind turbines, on-site solar PV.

Aligned to the relative costs & environmental impact of energy types

TPER accounts for the inherent higher value of electricity compared to other energy types and it is more closely aligned to the relative costs and environmental impact of electricity compared to other energy types.

For example, 1 kWh TFC of electricity typically costs over three times more than 1 kWh TFC of natural gas. In TFC terms, both are counted as 1 kWh. However, in TPER terms the 1 kWh of electricity is counted as 1.96 kWh and the 1 kWh of natural gas is counted as 1.1 kWh (based on 2018 conversion factors).

Projected primary energy factor for electricity

The conversion factors for electricity change from year to year as the efficiency of the electricity system changes.  SEAI prepares forecasts for the primary energy conversion factor for electricity in future years.  The latest forecast out to 2030 is based on the modelling work that SEAI completed as part of Ireland’s Draft National Energy and Climate Plan 2021-2030, modified to allow for the 70% RES-E target set out in the Climate Action Plan 2019 (with a total of 12GW of renewable electricity capacity operational by 2030).  The forecast values are based on the best information available to SEAI at the time of publication (September 2019). They incorporate a large number of variables and assumptions, the most important of which are outlined below.  The forecast values for the primary energy conversion factor will be reviewed and updated periodically by SEAI. Users of this data should carefully consider its appropriateness for use in their particular circumstances, particularly if using the forecast values for making investment decisions.


  • Unplanned outages at Moneypoint to date in 2019 are included;
  • 2030 RES-E target of 70% will be achieved;
  • Moneypoint will close at the end of 2025;
  • Peat stations will co-fire with high shares of biomass until the end of 2030;
  • Projections of electricity demand are informed by Eirgrid Generation Capacity Statement November 2018.

Full details of the assmptions used for the Draft National Energy and Climate Plan 2021-2030 can be found in the Appendix of SEAI's National Energy Projections 2019 report.

YearProjected primary energy factor for electricity
2019 2.115971
2020 2.213776
2021 2.186483
2022 2.167698
2023 2.125236
2024 2.087327
2025 2.029952
2026 1.822846
2027 1.791018
2028 1.767259
2029 1.737696
2030 1.711192