An introduction

This is where you will find an overview of how the biogas register works and the documentation points for mass balancing.

On the sub-pages, you will find additional information corresponding to their role and according to the intended use the biomethane.

"The biogas producer enters the biomethane he injects into the natural gas grid into the register. An environmental auditor or other expert assessor verifies the facility and production on site and confirms the quantity, character profile, and origin of the biogas in the register. Producers and intermediate distributors transfer the biomethane quantities purchased to the accounts of other register participants in accordance with the supply chain. The consumer withdraws biomethane from the natural gas grid, and the corresponding quantity is written off the register, either by the supplier or the consumer himself. Upon writing off, the consumer receives a register extract for the quantity consumed, stating the origin, character profile, as well as injection and dispensation information. The consumer can use it to apply for statutory rebates and reimbursements."

In order to be able to use the biogas register, a facility audit must first be performed by an environmental auditor. The auditor verifies that biomethane production conforms to requirements according to various criteria. If all the criteria are satisfied, the biomethane producer can begin entering biogas quantities into the biogas register.

A second audit is carried out to verify the quantities and quality of the biomethane, which usually considers the biomethane quantities produced annually by the facility. The audit report is uploaded to the biogas register and dena verifies it against the data provided by the biomethane producer. Once it is approved by dena, the biomethane can be consumed: The consumer will be entered into the biogas register and the register extract created. This provides the end consumer with reliable and transparent documentation of the biomethane he uses.

Requirements and documentation points

In order to fulfil the requirements of the Renewable Energy Sources Act (EEG) and the Renewable Energy Heat Act (EEWärmeG), the corresponding quantity of biomethane must be completely documented from the point of manufacture (commencement of mass balancing) via the point it is injected into the natural gas grid, its transportation in the natural gas grid, up to its dispensation from the natural gas network (end of mass balancing) as part of the mass balancing procedure.

1st documentation point (commencement of mass balancing) = "Entry"

The first mass balancing documentation is to take place during the handover of biomethane from the connectee to the transport customer for injection into the natural gas grid at the grid connection point according to Section 32 No. 2 of the Regulations on Access to Gas Supply Networks (GasNZV).

The numerically correct transfer of the quantity of biomethane handed over to the transport customer in a specified period of time at grid connection point will be confirmed in the biogas register by an auditor after "entry" of the quantity of biomethane. In addition, an audit document / audit report will be entered into the register to document the mass balancing. 

2nd documentation point ("Trade within the natural gas grid") = "transfer"

Each transfer of a delivery entitlement to a quantity of gas corresponding to a quantity of biomethane transported in the natural gas grid must be documented with regard to mass balancing. In particular, this applies to cases where biomethane products are traded at the virtual trading point.

For this purpose, the documentation of the transfer of rights from the current rights holder to the new rights holder is necessary. The documentation must specify, in a transparent format, the parties involved in the transfer of rights as well as the corresponding quantity of biomethane involved (e.g. based on its heat equivalent) for which the rights are to be transferred from the existing to the new rights holder.

In the German biogas register, this "transfer" is documented in a transparent format, and specifies both the quantity of biomethane as well as the new rights holder ("Buyer"). Furthermore, the existing rights holder ("Seller") submits a declaration that the same quantity of biomethane is only transferred once (preclusion of multiple sales).

3rd documentation point (delivery of gas at point of dispensation from the natural gas grid) = "withdrawal"

Mass balancing obligations end with the recording of the quantity at the point of dispensation from the natural gas grid. This can be used as a record documenting mass balancing for the electricity grid operator and/or the relevant authority via an extract from an independent database, assuming that this extract confirms the quantity of biomethane withdrawn from the database and is linked to documentation of the actual quantity of biomethane physically delivered based on corresponding invoices, readings from legally calibrated meters, or comparable documentation.

In the German biogas register, this "withdrawal" results in a biogas register extract being generated in the German biogas register, which documents the quantity of biomethane both with regard to properties relevant for payment, records, and to mass balancing.

Hence, this biogas register extract can be presented to electricity grid operators and/or the relevant authorities as a record for mass balancing  and as an auxiliary instrument for obtaining remuneration and/or the recognition of records.

To top

To top