Self-assessed
Bronze
Below 20%
of the fleet is battery electric.
GreenTurtle Standard / Version 1
A framework for
honest fleet progress.
A self-assessment framework for fleet carbon measurement and battery-electric fleet share. Not an audit. Not third-party certification.
The basis of the Standard
A mark needs a method behind it.
The value is in the traceability: the source of the distance, the powertrain treatment, the reporting period and the method version. A tier describes a fleet’s battery-electric share; it is not a carbon-neutrality claim.
Every figure, traced to how it was made.Read the full methodology summary
Published thresholds / Self-assessed
Four tiers. One transparent basis.
Tier thresholds use the share of the fleet that is pure battery electric. Plug-in hybrids do not count as pure battery electric. The bands below express the published minimum thresholds as non-overlapping ranges.
Self-assessed
Silver
20% to below 40%
of the fleet is battery electric.
Self-assessed
Gold
40% to below 60%
of the fleet is battery electric.
Self-assessed
Platinum
60% and above
of the fleet is battery electric.
Tiers are always described as self-assessed. They do not establish independent assurance or whole-business sustainability performance.
Displaying the mark
Keep the record attached.
Whenever a fleet’s Standard mark is displayed, it must carry its verification code or public link. The record explains the claim; the presence of a code is not independent validation.
Record
A code with context
The code format is GT-XXXX-XXXX. A record includes the tier, annual tonnes, fleet size, zero-tailpipe count, electrified share, period and method version.
Status
Revocation stays visible
If a record is revoked, its public page must say so. An old image of a mark is not enough to establish current status.
Privacy
Only the summary
There is no searchable fleet register in the source design. Other fleet information should not be exposed.