CSRD Scope 1 fleet reporting: documenting idle-reduction with no-idle parking AC

• Table of Contents

1. CSRD scope and ESRS E1 fleet emissions
2. Assurance requirements and audit evidence
3. How Vethy V-FMSG-24 telematics produces CSRD-grade evidence
4. Example fleet disclosure language

The EU Corporate Sustainability Reporting Directive (CSRD) and its underlying European Sustainability Reporting Standards (ESRS) bring fleet emissions into the assured disclosure perimeter for in-scope EU and non-EU large companies. Scope 1 disclosures under ESRS E1 specifically include diesel burned while a tractor is parked and idling — historically a soft number for many fleets. Idle-reduction interventions including no-idle parking AC are now an audit-relevant control, and the assurance providers want telematics-grade evidence. This page describes how Vethy VS02 PRO produces that evidence.

CSRD scope and ESRS E1 fleet emissions

CSRD applies to large EU companies and non-EU companies with significant EU activity, phased in 2024-2028. ESRS E1 (Climate Change) requires disclosure of Scope 1, 2, and 3 GHG emissions using either market-based or location-based methods, with gross and net figures and reduction targets aligned with 1.5 °C pathways. Scope 1 for fleet operators includes all combustion of fuels in company-owned or company-leased vehicles, including diesel burned while parked and idling for cab climate, hotel loads, or anti-theft. EFRAG implementation guidance specifically calls out idle burn as a material Scope 1 line that must be measured and reported, not estimated.

Assurance requirements and audit evidence

CSRD requires limited assurance from year one, moving to reasonable assurance later. Limited assurance providers (Big Four and other licensed assurers) follow ISAE 3000 (Revised) and ISAE 3410 for GHG statements. The key evidence requirement is timestamped, vehicle-level fuel and run-state data — not driver self-reports or fleet-level averages. For idle reduction claims (e.g., 'we reduced idle hours 38% through parking AC deployment'), the assurance provider expects: (1) pre-intervention idle hour baseline by tractor from ELD or telematics, (2) post-intervention idle hour data from the same systems, (3) parking AC system uptime data showing the alternative load actually ran during the reduced idle hours, and (4) reconciliation that the delta in idle fuel burn matches the reported reduction.

How Vethy V-FMSG-24 telematics produces CSRD-grade evidence

The Vethy VS02 PRO ships with V-FMSG-24 telematics that logs system uptime, cab thermostat setpoint, actual cab temperature, ambient temperature, and battery state-of-charge at 1-minute resolution, exportable in CSV and via REST API. Integrated with the fleet's primary ELD or telematics (Geotab, Samsara, KeepTruckin, Webfleet, Frotcom, etc.) this produces the cross-reconciled dataset assurance providers need. Specifically: Vethy uptime in hours can be subtracted from prior-period idle hours on the same tractor at the same time-of-day to produce an audit-defensible idle reduction figure. The fuel burn delta at 0.8 gallons/hour times the diesel emission factor (10.21 kg CO2e/gallon ULSD) yields the ESRS E1 Scope 1 CO2e reduction in tonnes.

Example fleet disclosure language

Illustrative ESRS E1 disclosure aligned to actual Vethy deployments: 'In reporting period 2026, the fleet completed deployment of no-idle parking AC on 1 240 long-haul tractors. Pre-deployment idle hours averaged 1 620 hours per tractor per year. Post-deployment idle hours averaged 1 005 hours per tractor per year, a reduction of 615 hours per tractor. Idle fuel burn factor used: 0.8 US gallons diesel per idle hour. Emission factor: 10.21 kg CO2e/gallon (US EPA 2024 ULSD). Total Scope 1 reduction: 1 240 × 615 × 0.8 × 10.21 / 1 000 = 6 222 tonnes CO2e per year. Assurance: limited assurance opinion issued by [assurer] following ISAE 3410.' This language is reproducible across other ESG frameworks (TCFD, ISSB, CDP) with minor adaptation.

Frequently asked questions

Does CSRD apply to my fleet?

CSRD applies to large EU companies and non-EU companies with significant EU activity, phased in 2024-2028. Wave 1 (FY2024 reporting in 2025) covers companies already under NFRD; Wave 2 (FY2025) covers other large EU companies; Wave 3 (FY2026) covers listed SMEs; Wave 4 (FY2028) covers non-EU parent companies with significant EU operations.

What evidence does an assurance provider want for idle reduction claims?

Timestamped, vehicle-level fuel and run-state data: pre-intervention idle hour baseline from ELD/telematics, post-intervention idle data, parking AC uptime data confirming the alternative load actually ran, and reconciliation that the delta in idle fuel burn matches the reported reduction.

Does Vethy V-FMSG-24 telematics integrate with major ELD platforms?

Yes — Vethy V-FMSG-24 exports CSV and REST API and is documented for integration with Geotab, Samsara, KeepTruckin (Motive), Webfleet, Frotcom, and most other major telematics platforms. Integration produces the cross-reconciled dataset CSRD assurance providers need.

What's the typical CO2e reduction per tractor from parking AC?

Idle reduction of 500-700 hours per tractor per year at 0.8 gallons/hour and 10.21 kg CO2e/gallon yields approximately 4-6 tonnes CO2e per tractor per year. For a 1 000-tractor fleet, that's 4 000-6 000 tonnes CO2e per year — a material Scope 1 reduction.