Zemo publishes new RFAS well-to-wheel calculator as Scheme membership rises again
Thu 13 March 2025
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Zemo has published a new well-to-wheel GHG Emissions Calculator as well as a revised Fleet Operators Guide to support approved suppliers who are members of the Partnership's Renewable Fuels Assurance Scheme (RFAS). The Scheme continues to grow with 53 suppliers now approved.
The WTW Emissions Calculator is updated annually following the publishing of the DESNZ company reporting GHG emissions factors. It is a relatively simple tool designed to allow fleet operators to estimate the WTW GHG emissions impact of the renewable fuel they purchase in kgCO2e.
Under Zemo's Renewable Fuels Assurance Scheme, the GHG emissions intensity of the renewable fuel, or blend, is based on a fuel life-cycle methodology. This encompasses feedstock cultivation or waste raw material collection, fuel production, distribution and combustion. The methodology is aligned with the Renewable Transport Fuel Obligation (RTFO) for the calculation of renewable fuel GHG emissions.
Zemo has also published a new version of the Fleet Operators Guide which provides full details of the methodology behind the WTW GHG emissions calculator.
The Renewable Fuel Assurance Scheme provides commercial vehicle fleet and non-road mobile machinery operators with independent assurance of the life-cycle greenhouse gas emissions and feedstock sustainability performance of renewable fuels.
Every three months, renewable fuel suppliers approved under the Scheme issue their customers a Renewable Fuel Declaration for the batches of renewable fuel sold. The declaration is specific to each customer and provides GHG emissions data for the fuel supplied. To ensure that the chain of custody is unbroken and the information presented is valid, the declarations are non-transferable; fuel distributors or traders must be approved in their own right to issue declarations to their customers.
Zemo's RFAS continues to grow with 53 renewable fuel suppliers now approved; Speedy Hire UK Ltd has recently been approved to the Scheme.
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