1. The RES Units with Market Participation Obligation under a Contract for Differential State Aid Support (DSAS Contract), as set forth in Law 4414/2016, shall start having balancing obligations after the end of the transitional period. The transitional period shall end upon commencement of the Continuous Intra-Day Trading in coupling operation, as defined in accordance with the provisions of the Day-Ahead & Intra-Day Markets Trading Rulebook.

2. Until the end of the transitional period:

   a) The Reversal of the Difference in Income shall be calculated as per Article 26.3 and Article 26.4 of this Rulebook.

   b) For RES Units with Market Participation Obligation under a DSAS Contract Article 22.6 of this Rulebook shall not apply.

For the purposes of Calculation of Production Imbalances for RES Units with Market Participation Obligation under a DSAS Contract, each non-Dispatchable RES Units Portfolio shall be generally symbolized as ${\text{e}}_{\text{rep,oper,z}}$, where:

• $rep$ the RES Units Portfolio representative. The non-Dispatchable RES Units Portfolios shall be represented by a RES Producer, a RES Aggregator or by the Last Resort RES Aggregator.

• $oper$ the operational status, which corresponds to normal operation under a DSAS contract or Testing Operation under a DSAS contract.

• $z$ the HETS Bidding Zones.

1. The Final Imbalance of a non-Dispatchable RES Units Portfolio under a DSAS Contract, ${\text{e}}_{\text{rep,oper,z}}$, for an Imbalance Settlement Period shall be equal to the difference between the quantity of energy that results on the basis of the Entity's certified measurement data and the Entity’s Market Schedule as given below:

   $FIM{B}_{e_{rep,oper,z}t} = M{Q}_{e_{rep,oper,z }t} - M{S}_{e_{rep,oper,z }t}$

   Where,
   $FIM{B}_{e_{rep,oper,z}t}$   the quantity of the Final Imbalance in MWh for a non-Dispatchable RES Units Portfolio under a DSAS Contract ${\text{e}}_{\text{rep,oper,z}}$  and the Imbalance Settlement Period t..
   $M{Q}_{e_{rep,oper,z}t}$   the amount of energy at the Connection Point with the HETS or the Distribution Network, in MWh, resulting from the certified metered data of the non-Dispatchable RES Units Portfolio under a DSAS Contract${\text{e}}_{\text{rep,oper,z}}$ for the Imbalance Settlement Period t
   $M{S}_{e_{rep,oper,z}t}$   The Market Schedule of the non-Dispatchable RES Units Portfolio under a DSAS Contract ${\text{e}}_{\text{rep,oper,z}}$ for the Imbalance Settlement Period t

    

1. For each Imbalance Settlement Period t the HETS Operator shall calculate the debit / credit $IMBC\_A_{e_{rep,oper,z}t}$ in € and the debit / credit $IMBC\_B_{e_{rep,oper,z}t}$ in € for each non-Dispatchable RES Units Portfolio under a DSAS Contract e, as follows:

   $IMBC\_A_{e_{rep,oper,z}t} = FIM{B}_{e_{rep,oper,z}t} \times DAM{P}_{z,t}$
   and
   $IMBC\_B_{e_{rep,oper,z}t} = FIM{B}_{e_{rep,oper,z}t} \times (I{P}_{t }- DAM{P}_{z,t})$

   Where:
   $FIM{B}_{e_{rep,oper,z}t}$  the quantity of the Final Imbalance, in MWh, for the non-Dispatchable RES Units Portfolio ${\text{e}}_{\text{rep,oper,z}}$ for the Imbalance Settlement Period t.
   $DAM{P}_{z,t}$   the price of the Day-Ahead Market in MWh for each Bidding Zone z for the Market Time Unit.

2. The above debits / credits shall be collected or allocated by the Clearing House as follows:

   1) For a non-Dispatchable RES Units Portfolio ${\text{e}}_{\text{rep,oper,z}}$ which is represented by a RES Producer or RES Aggregator in normal operation or Testing Operation and belongs to the Bidding Zone z,

   i. when the amount $IMBC\_A_{e_{rep,oper,z}t}$ is found to be negative, the RES Producer or RES Aggregator must pay the calculated amount, whereas when the amount $IMBC\_A_{e_{rep,oper,z}t}$ is found to be positive, the RES Producer or RES Aggregator is entitled to collect the calculated amount,
   ii. when the amount $IMBC\_B_{e_{rep,oper,z}t}$ is found to be negative, the calculated amount is charged to DAPEEP, whereas when the amount $IMBC\_B_{e_{rep,oper,z}t}$ is found to be positive, the calculated amount is credited to DAPEEP.

   2) For a non-Dispatchable RES Units Portfolio ${\text{e}}_{\text{rep,oper,z}}$ which is represented by the Last Resort RES Aggregator in normal operation or Testing Operation and belongs to the Bidding Zone z,

   i. when the amounts $IMBC\_A_{e_{rep,oper,z}t}$ and $IMBC\_B_{e_{rep,oper,z}t}$ are found to be negative, they are charged to the Last Resort RES Aggregator,
   ii. when the amounts $IMBC\_A_{e_{rep,oper,z}t}$ and $IMBC\_B_{e_{rep,oper,z}t}$ are found to be positive, they are credited to the Last Resort RES Aggregator.

   Details regarding the Settlement of Imbalances of RES Units Portfolios are provided in the Technical Decision "Balancing Market Settlement".