Calculation

Contents

Calculating the network access fee in two steps

Step 1

Start by determining the period of utilisation T. This determines which price sheet you must take factors PK and PD from.

Calculating the network access fee - step 1

Step 2

Next, multiply these two figures with the annual energy used E and the maximum power Pmax respectively and add the sums to obtain the network access fee, as shown below.

Calculating the network access fee - step 2

Description of the data required

To determine the network access fee (kilowatt hour rate plus demand charge), you will need the following data:

Value Details
Energy used E The energy received in the respective invoicing period (year or month in the case of the monthly demand charge system) in kWh
Maximum power Pmax The maximum 15-minute mean value for power in the respective invoicing period (year or month in the case of the monthly demand charge system) in kWh
Demand charge PD The basic annual charge in EUR/kW, the rate being dependent on the specific period of utilisation
Kilowatt hour rate PK The consumption price in EUR cents/kWh, the rate being dependent on the specific period of utilisation
Point of use Extra high voltage or transformation to high voltage
Registered capacity The registered network reserve capacity in KW – only relevant to facilities with autoproduction

Detailed explanation of the calculation

Step 1

Calculate the quotient of the annual energy used E and the annual maximum power Pmax to determine the annual period of utilisation T. This determines which price sheet the factors PK and PD must be taken from. These are used in step 2 of the calculation. The following applies:

If the annual period of utilisation T exceeds 2,500 h/a, price sheet 1 applies.

If the annual period of utilisation T is less than 2,500 h/a, price sheet 2 applies.

Step 2

You will find the demand charge and the kilowatt hour rate in the respective price sheet. Now multiply the kilowatt hour rate with the annual energy used E (kilowatt hour fee), and multiply the demand charge PD with the annual maximum power PL with the annual maximum power Pmax. Add the two figures to obtain the network access fee.

Monthly demand charge system

Where the monthly demand charge system is applied, the monthly network access fee is obtained by adding the products of the demand charge and the respective monthly maximum power Pmax (demand fee), and of the kilowatt hour rate and the monthly energy used E (kilowatt hour fee). Further information is provided in the relevant section of Price sheets.

Example calculation

Input data

Annual energy used E 2,500 million kWh
Annual maximum power Pmax 500,000 kW
Point of use Extra high voltage network, TransnetBW

Step 1: Annual period of utilisation T and price sheets

  • Since T = E ÷ P, the annual period of utilisation T = 5,000 h/a
  • Where T > 2,500 h/a, price sheet 1 applies
  • Price sheet 1 gives a Pd of 44.89 EUR/kW for point of use extra high voltage network and a Pk of 0.10 EUR cents/kWh.

Step 2: Multiplication

2,500 million kWh x 0.10 EUR cents/kWh = 2,500,000 EUR

500,000 kW x 44.89 EUR/kW = 22,445,000 EUR

Total net fee for network services 24,945,000 EUR

Specific fee (net) 0.998 EUR cents / kWh

Prices do not include taxes, levies or other payments TransnetBW is legally obliged to make, which directly or indirectly increase the cost of network utilisation (e.g. CHP levy, Section 19, StromNEV levy)

Network reserve capacity

We calculate the fee for network reserve capacity on the basis of an annual demand charge (EUR/kW and year). This depends on:

  • the duration of annual consumption of reserve capacity (h/a) and
  • the point of use, and
  • the registered capacity.

The respective prices are given here: Price sheets.