The model

The SFS Network Mass Balance

The Scheme is set up to enable eligible renewable fuel to enter a defined corporate fuel network at one location and an equivalent certified quantity of physical fuel to be supplied to a customer from another location in that same defined network. The purpose is to maintain control and transparency whilst allowing environmental and financial optimisation of the supply of sustainable fuel by reducing the distances fuel has to travel and increasing availability with shared infrastructure.

Important to understand

The same renewable molecules are not necessarily delivered to the customer

The SFS allocates the renewable attributes of fuel within a controlled network which is audited to regularly verify sustainability claims and the 'one in, one out' basis. The physical fuel supplied to the customer meets the applicable EN590 or EN228 specification; fuel quality certification is outside the scope of the SFS.

The critical controls

One-to-one allocation

Each renewable quantity is allocated once only. A quantity cannot support two customer supplies and characteristics are never combined or averaged.

Physical fuel in and out

Renewable fuel must physically enter the defined network, and physical fuel must be supplied to the customer from a location within that network.

Separate EN590 and EN228 balances

Each fuel pool holds its own credential balance at Member, Jurisdiction, Defined Corporate Network and Fuel Pool level. Pools are never merged.

Closing physical-stock support

Carry-forward at the end of a verification period is limited to the lower of unallocated credentials and eligible physical closing stock.

No negative credential balance

Issuance is blocked by server-side transaction controls where an allocation would exceed the available balance or the physical delivered volume.

Public certificate validation

Anyone holding an Evidence of Sustainability can confirm its current status through the SFS Certificate Validator or its QR code.

Periodic verification by the SFS

Each network is verified on a recurring cycle of no longer than three months, covering reconciliation, source documents, stock and carry-forward.

Boundary

How each Network Mass Balance is defined

Member  ->  Jurisdiction  ->  Defined Corporate Network  ->  Fuel Pool

Fuel pools:   EN590 Diesel   |   EN228 Gasoline   (always separate)