The Unit Charge of the Imbalances Component is calculated as the quotient of the attributable Required Revenue to the total estimated annual amount of activated energy and imbalances, as follows:

$UNBM{F}^{IMB}=\frac{0,2\times (Balancing Market Required Revenue )}{EA{E}^{up/dn}+EFIMB}$

Where:

𝑈𝑁𝐵𝑀𝐹^𝐼𝑀𝐵 The Unit Charge corresponding to the Imbalance Component of the Balancing Market Fee.

𝐸𝐴𝐸^{𝑢𝑝⁄𝑑𝑛} The estimate of the total upward and downward activated energy in MWh for all Balancing Service Providers for year y+1.

𝐸𝐹𝐼𝑀𝐵 The estimate of the Final Imbalance in MWh for all Balance Responsible Parties p for year y+1.

Estimates of total upward and downward activated energy and Imbalances energy for year y+1 are based on the latest available 12-month reporting data.

In the above calculation, both upward and downward activated energy are considered to have a positive sign. Activated energy means the activated Balancing Energy for mFRR and aFRR as well as activated energy for non-balancing purposes.

In addition, for the estimation of the Final Imbalance, the sum of the absolute values of the Imbalances for each Participant and each Imbalance Settlement Period is taken into account for each of the following categories of Entities:

a) Non-Dispatchable Load Portfolios, including Universal Service Portfolios and Last Resort Portfolios,

b) Balancing Service Entities, i.e. Dispatchable Load Portfolios, Dispatchable RES Units Portfolios and Dispatchable Generating Units Portfolios,

c) Non-Dispatchable RES Units Portfolios and RES Units Portfolio without Market Participation Obligation, and

d) Import Portfolios and Export Portfolios.

The Energy Component Unit Charge is calculated as the quotient of the Required Revenue to the total estimated amount of energy absorbed/produced and the trading schedules for electricity imports/exports, excluding the schedules of the HETS Operator and the Shipping Agent, as follows:

$UNBM{F}^{EN}=\frac{0,8\times (Required Revenue)}{{\sum }_p^{ }\left[{\sum }_m^{ }\{EM{Q}_{p,m}+ERealSc{h}_{p,m}\}\right]}$

Where,

𝑈𝑁𝐵𝑀𝐹^𝐸𝑁 The Unit Charge corresponding to the Energy Component of the Balancing Market Fee.

𝐸𝑀𝑄_𝑝,𝑚 The estimate of the total energy absorbed (calculated at the Transmission System-Distribution System Boundary) and the energy produced for all Participants for year y+1.

𝐸𝑅𝑒𝑎𝑙𝑆𝑐ℎ_𝑝,𝑚 The estimated amount for trading schedules in electricity imports/exports for all Participants for year y+1. Import/export schedules of the HETS Operator and the Transmission System Operator are excluded.

Estimates of total energy absorbed/produced and electricity import/export trading schedules for year y+1 are based on the latest available 12-month reporting data.