In the detailed invoice, the "Expenditure for energy" section shows the price of the offer made up of a variable part (then energy component) equal to the PUN and a fixed part equal to the amount of the subscription plan (then subscription) chosen during the subscription phase. In particular:
Energy component
The price of the energy component, excluding VAT and taxes, equal to the Single National Price (PUN) differentiated according to the time slots indicated below, applied with a monthly average and defined with a monthly frequency which corresponds to the final arithmetic average monthly values of the PUN, expressed in Euro/kWh, as determined by the Energy Markets Operator (GME) and published on GME's website and which will be increased by the grid losses applied as defined, published and updated by ARERA.
F1 peak: 8.00-19.00 from Monday to Friday, excluding national holidays
F2 peak: 07.00-8.00 and 19.00-23.00 from Monday to Friday, Saturday 07.00-23.00, excluding national holidays
F3 peak: 11.00pm-7.00am from Monday to Saturday, Sunday and national holidays
a) For withdrawal points not treated on a single-hour basis, for the purposes of applying the above fees, the determination of the energy supplied for each time slot depends on the method of treatment of the measures for the purpose of regulating dispatching pursuant to Resolution 278/07 [AEEGSI], hereinafter "Authority"). In particular:
i) in the event of hourly treatment of the measurements, the withdrawals per peak will be calculated by adding up the hourly measurements communicated by the distributor for each peak [ARERA];
ii) in the case of treatment by range of measures, the withdrawals by range F1/F2/F3 will be calculated by attributing to them weights respectively equal to 1/0.122/0.028 for peak hours and 0/0.878/ 0.972 for off-peak hours. For more information, see art. 6.4 of the GTC;
b) For single-rate withdrawal points: the price of the energy component will be calculated monthly and corresponds to the monthly arithmetic average final value of the single-rate PUN.
Subscription
expressed in €/POD/Year, to be paid on a monthly basis, excluding VAT and taxes, equal to the monthly contribution defined for the subscription plan chosen during the subscription phase.
The costs for dispatching, the costs for the transport service and meter management and the system charges will also be applied, to the extent defined by the ARERA (Regulatory Authority for Energy, Networks and the Environment) and from time to time modified and updated. For further information, please refer to the Technical and Economic Conditions of the Open Energy offer.
The Energy Expenditure includes the subscription component and the PUN energy component, the dispatching price (including unbalancing, the capacity market fee and network losses), the DISPbt component (applicable only for customers with LV supply).
For more details, consult the percentages of expenditure in the bill.