Customers who wish to take off electricity from the system of 50Hertz or feed into it conclude a grid use contract with 50Hertz. Based on meter counts, the electricity taken off by the customer is charged for on the basis of the price list for grid use.
On 16/04/2015, the Federal Network Agency (BNetzA) made a decision on the grid use contract / supplier framework agreement (electricity) for offtake. The model contract annexed to the BNetzA decision is binding.
The Federal Network Agency nevertheless granted the system operators some individual flexibility, which 50Hertz made use of. To this effect, 50Hertz offers a model grid use contract for offtake customers (end consumers, suppliers) as well as for customers with available feed-in and offtake. The adjustments made to the contract texts by 50Hertz are limited to the absolutely required minimum. The changes ensure that particularities of the settlement for grid use at the transmission system level are taken into account.
The Federal Network Agency published its decision and its grid use contract here (German).