Electric Book & Claim (EBC) applies the same core accounting principle used in SAF Book & Claim, but it is designed for electric aircraft flight activity rather than liquid fuel uplift. It exists because electric aviation, like any shared infrastructure system, cannot always perfectly match physical delivery and claims on a one-to-one basis across different locations, operators, and charging arrangements.

In practical terms, EBC allows an operator or organisation to claim verified emissions reductions linked to electric flight operations, even when the physical charging infrastructure is shared, distributed, or not dedicated exclusively to a single customer. The outcome is a transparent, auditable certificate that can be issued, transferred, and retired so that the benefit is claimed by one party only.

With SAF Book & Claim, sustainable aviation fuel is produced and delivered to one location, but it may be unavailable for uplift to an aircraft in another. The emissions benefit is therefore separated from the physical fuel and sold independently to an aircraft operator through a certificate. That payment is intended to support further production and availability of SAF. Ultimately, what is being purchased is the CO₂ reduction, not the physical molecule of fuel.

Electric Book & Claim works in a similar way, but for electric aviation:

• Electric flight activity is the unit of account. Certificates are allocated against logged electric aircraft flight hours and measured kWh used, rather than generic electricity consumption.
• Claims remain consistent across airfields. Operators flying from multiple locations can apply the same accounting approach without needing identical infrastructure everywhere.
• The attribute is separated from the physical delivery. Shared infrastructure can serve multiple users, while certificates preserve who can claim the benefit and prevent overlap.
• The benefit is transferable to a named organisation. That organisation can retire the certificate and use it to support reporting and public claims (subject to its reporting framework and claim language).

There is no requirement for the energy to be physically delivered to the claiming organisation, just as SAF does not need to be physically uplifted by the aircraft operator making the claim. In both cases, Book & Claim exists because supply chains and operations are real, but physical attribution is not always neatly alignable in real time.

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Why this matters

Energy and fuel systems are shared infrastructure. Operators and customers want to fund decarbonisation and make credible claims, but physical delivery and accounting claims cannot always be matched perfectly, especially when operations span many sites. Without Book & Claim, organisations are often forced into either no claim at all or claims based on broad averages that can be difficult to defend under audit.

Book & Claim solves this by:

• Preserving traceability through documented issuance, transfer, and retirement records linked to flight and energy logs.
• Preventing double counting by ensuring the same activity cannot be claimed by more than one party.
• Enabling scale so demand for electric aviation can grow faster than charging build-outs and complex site-by-site contracting.
• Improving comparability by expressing reductions in consistent, auditable units (kWh, flight hours, and CO₂ avoided vs a baseline aircraft).

Electric Book & Claim is a concept developed by Aerovolt. The key differences from SAF Book & Claim come down to what is measured, how easily it can be verified, and how consistently it can be applied across regions. SAF Book & Claim is anchored to fuel production, blending limits, logistics, and physical availability. Electric Book & Claim is anchored to logged electric aircraft operations and measured energy use.

Because electric aircraft operations can be recorded with high resolution (flight logs, telemetry, charger data, and measured kWh), the certificate lifecycle can be designed to be very clear for auditors: what happened, when it happened, which aircraft did it, how much energy was used, and how the baseline emissions comparison was calculated.

1. Electric aircraft focus

   CO₂ certificates apply specifically to electric flight operations. This creates a direct pathway for organisations to reduce emissions from flight activity that would otherwise be performed using piston or turbine aircraft, particularly in training, short-range utility missions, and emerging regional operations.

   • What this enables: verified decarbonisation of flight hours now, without waiting for SAF supply at every airport.
   • Why it matters: electric operations can be verified at the mission level using measured data.
   • Examples: flight schools tracking student hours, charter operators allocating reductions to specific clients, or corporate operators allocating reductions to duty flights.

2. Simplified, more consistent pricing

   SAF pricing can vary widely due to multiple producers, feedstocks, blending limits, logistics, and policy incentives. Electric Book & Claim can be structured with a more consistent pricing model, allowing customers to forecast cost per tonne of CO₂ avoided with fewer variables.

   • What this enables: more predictable budgeting for decarbonising electric flight activity.
   • Why it matters: sustainability teams and finance teams can plan programmes without fuel-market volatility.
   • Example: an operator flying across multiple regions can apply the same certificate approach without renegotiating around local fossil fuel pricing swings.

3. More direct measurement and reconciliation

   Electric aviation accounting can lean on direct operational evidence: aircraft logs, charger logs, and measured kWh. SAF claims often involve additional reconciliation across custody transfer, blending, delivery, and physical availability, which adds complexity.

   • What this enables: a tighter link between operational evidence and certificates.
   • Why it matters: reduced reliance on assumptions and fewer opportunities for accounting disputes.
   • Example: a specific block of flight hours can be reconciled to measured kWh and a baseline aircraft fuel burn model.

To compare like-for-like, it helps to convert each option into a cost per metric tonne of CO₂ avoided. Below is a worked example for neat SAF using an assumed lifecycle reduction, followed by the Electric Book & Claim price.

SAF costs are highly sensitive to supply availability, policy incentives, blending constraints, and the reference price of fossil Jet A. For that reason, the SAF calculation below is best treated as an example using the inputs shown, not a universal global price.

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Cost to Save 1 Tonne of CO₂ Using Neat SAF (Worked Example)

• Neat SAF price: $5.15 per litre (Oxford Airport, UK)
• Lifecycle CO₂ reduction (“quality”): 70% vs fossil Jet A
• Goal: cost per tonne of CO₂ avoided

Assumptions

• Jet fuel CO₂ factor (combustion): 3.16 kg CO₂ per kg fuel
• Jet fuel density: 0.8 kg per litre
• Baseline fossil Jet A price: $0.84 per litre (illustrative)

Step 1: CO₂ Avoided per Litre of SAF

Fossil CO₂ per litre:
0.8 kg fuel × 3.16 kg CO₂/kg = 2.528 kg CO₂ per litre (rounded to 2.53)

CO₂ avoided at 70% reduction:
2.53 × 0.70 = 1.771 kg CO₂ avoided per litre (rounded to 1.77)

Step 2: Incremental Cost per Litre

Incremental cost:
$5.15 − $0.84 = $4.31 per litre

Step 3: Cost per Tonne of CO₂ Avoided

Convert avoided CO₂ per litre to tonnes:
1.77 kg = 0.00177 tonnes

Cost per tonne avoided:
$4.31 ÷ 0.00177 ≈ $2,435 per tonne CO₂

SAF Price Summary

Approximate cost to save 1 tonne of CO₂ using SAF (with the inputs above): ~$2,400 per tonne CO₂

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Electric Book & Claim is $675 per tonne CO₂ saved.

This difference matters because it affects how quickly an operator can scale verified reductions. Where budgets are limited, a lower cost per tonne can fund more reductions for the same spend and accelerate adoption of electric flight operations.

• Illustrative example: a $240,000 budget could fund roughly 100 tonnes of avoided CO₂ via SAF at ~$2,400/t, or roughly 355 tonnes via Electric Book & Claim at $675/t.
• Practical implication: more electric flight hours can be supported and more verified reductions can be reported over the same period.

Calculating CO₂ savings from electric flight requires a like-for-like baseline. That means comparing an electric aircraft to a certified, commercially active piston or turbine aircraft with a similar airframe and mission profile. This ensures the savings are calculated using operational inputs that are measurable, repeatable, and auditable.

The objective is to answer one clear question: how much CO₂ would have been emitted to perform the same flight using a conventional aircraft? The difference between that baseline and the electric aircraft is the CO₂ saving that can be quantified and certified.

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CO₂ Saved: Bristell B23 Rotax 916is vs Bristell B23 Energic (Cruise, per hour)

Aircraft inputs

• Rotax 916is (AVGAS): 26 litres/hour in cruise
• B23 Energic (electric): 35 kWh/hour in cruise
• Power (both): 140 hp

1) Baseline CO₂: Rotax 916is on AVGAS (26 L/hour)

• 100LL density: ~0.717 kg/L
• CO₂ per kg fuel burned: ~3.05 kg CO₂/kg fuel

CO₂ per litre (AVGAS):
0.717 kg/L × 3.05 kg CO₂/kg = 2.187 kg CO₂ per litre (rounded to 2.19)

CO₂ per hour (AVGAS):
26 L/h × 2.187 kg CO₂/L = 56.86 kg CO₂ per hour (rounded to 56.9)

2) Electric aircraft CO₂ (example using a UK average grid factor)

Electric CO₂ depends on how the aircraft is charged. The example below uses a UK average grid reference factor:

• UK grid carbon intensity (example): ~0.126 kg CO₂/kWh

CO₂ per hour (electric, example):
35 kWh/h × 0.126 kg CO₂/kWh = 4.41 kg CO₂ per hour

Result: CO₂ saved per cruise hour

CO₂ saved (using the example grid factor):
56.9 − 4.41 = 52.49 kg CO₂ saved per hour (rounded to 52.5)

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How many flight hours equal 1 metric tonne of CO₂ avoided?

• Using the example grid factor (52.49 kg CO₂/hour saved):
  1,000 ÷ 52.49 = 19.05 flight hours per tonne
• If electric charging emissions are treated as near-zero (saving ~56.9 kg CO₂/hour):
  1,000 ÷ 56.9 = 17.58 flight hours per tonne

These calculations are shown step-by-step so they can be audited and reproduced. In practice, the same structure is used, but the precise inputs (baseline burn, emissions factors, and charging assumptions) are set by the chosen methodology and project rules.

The short answer is yes. Electric Book & Claim is structured to operate within recognised carbon market and assurance expectations, with a defined methodology, independent oversight, and registry-based traceability. Aerovolt is aligned with Verra and uses methodologies VM0038 and VMD0049, with a deviation supplement that includes aircraft engines and AVGAS 100LL used in cruise-hour baseline calculations.

In practical terms, “regulated” here means there is a documented ruleset for how credits are calculated and issued, how data must be recorded, and how third parties validate and verify outcomes. This increases buyer confidence and reduces the risk of claims being challenged.

What this gives buyers and operators:

• Methodology alignment: calculations follow published rules rather than ad hoc estimates.
• Independent assurance: third-party auditors assess evidence, monitoring, and controls.
• Registry traceability: issuance and retirement are recorded and can be referenced during audits.
• Clear claims structure: certificates provide a defensible basis for carbon reporting and disclosures.

You can view the first two project territories below where charging infrastructure is attributed:

• United Kingdom

• United States of America

Aerovolt is validated and verified by SustainCERT, which acts as an independent external project auditor.

For customers, this means published emissions reduction claims can be supported with documentation and a traceable pathway back to the underlying flight and charging logs.

Like SAF Book & Claim, you receive a carbon reduction report and certificate designed to support compliant reporting for your flight operations. Credits are issued once electric flight activity has accumulated and been reconciled under the applicable rules. The digital credit is then held in the Verra Registry (or relevant registry process), where it can be tracked and retired.

The certificate package is built to be practical for sustainability teams and defensible during audit. It is designed to show what activity occurred, how reductions were calculated, and how the claim is protected against double counting.

Typically, purchasers receive:

• Retirement evidence: confirmation the certificates have been retired and cannot be resold or reused after the flight activity has taken place. Most purchases are on a forward basis, with some spot retirements available.
• Carbon reduction report: baseline aircraft, emissions factors, and calculation approach used.
• Traceability references: links back to flight logs and measured energy data.
• Claims guidance: recommended wording to help ensure public statements remain accurate and defensible.

If your claims are audited, they can be traced back to the underlying flight and charging logs at source, creating a clear chain of evidence from operations through to certificate issuance and retirement.

In other words, you are not buying an abstract offset. You are purchasing a verified, traceable emissions reduction claim linked to real electric flight activity.

What Electric Book & Claim represents in electric aviation

In electric aviation, Electric Book & Claim (EBC Credit) is an accounting mechanism that attributes verified electric aircraft flight hours to a defined energy source. Claims are linked directly to logged electric flight activity, rather than to generic grid electricity consumption or estimated averages.

This approach allows electric flight operations to be accounted for consistently across different airfields and charging arrangements. The claim is anchored in measured aircraft energy use and recorded flight hours, creating a clear and auditable connection between the aircraft, the energy consumed, and the resulting emissions outcome.

Why this approach has strong integrity

Electric Book & Claim is designed to meet the expectations of auditors, regulators, and corporate reporting frameworks by emphasising measured evidence, traceability controls, and certificate retirement.

• Direct attribution to flight activity: claims are tied to electric aircraft flight hours and measured energy use.
• No reliance on proxies: avoids broad averages and simplifies reconciliation to primary operational data.
• Immediate and verifiable: flight activity and energy use are recorded as they occur and can be checked.
• Clear audit trail: claims can be issued, tracked, and retired against specific electric flight operations.
• Strong controls against double counting: retirement ensures the same claim cannot be used twice.

Why this compares well against forestry and nature-based projects

Forestry and nature-based carbon projects are widely criticised because their climate impact is often uncertain, reversible, and delayed. Common challenges include:

• Non-permanence: carbon storage can be lost through fire, logging, pests, or degradation.
• Additionality risk: outcomes depend on counterfactual land-use assumptions.
• Leakage: protecting one area may shift emissions elsewhere.
• Long time horizons: claimed benefits accrue over decades rather than immediately.

Electric Book & Claim avoids these issues by focusing on real electric flight activity occurring in the present. The claim does not depend on long-term storage, future land management, or ecological modelling.

Concrete comparison example

• Forestry project: a company purchases credits based on projected carbon storage over several decades, with exposure to reversal and modelling risk.
• Electric Book & Claim (electric aviation): the same company attributes electric aircraft flight hours through certificates that are issued and retired against those flights, with an auditable chain back to operational logs.

Bottom line

Electric Book & Claim in electric aviation is not an offset based on future promises. It is a transparent accounting mechanism that links real electric flight activity to measurable energy use. Compared with high-risk forestry projects, it offers superior traceability, credibility, and auditability at a time when aviation climate claims are under increasing scrutiny.

Electric Book & Claim is designed to be adopted without disrupting flight operations. The aim is to make certificate allocation as automated as possible using operational data you already generate, such as flight hours, aircraft utilisation, mission records, and measured energy use.

We are integrating our carbon accounting into the back end and APIs of flight operations platforms (for example, SkyLegs). This allows mission tracking to be automated while allocating the correct volume of EBC Credits and certificates to the operator as flights are logged.

How it works in practice:

• Step 1: Flights are logged as normal through your operations platform or manual logs.
• Step 2: Electric flight hours and energy use are reconciled against the baseline emissions model.
• Step 3: The correct volume of EBC Credits is calculated and allocated.
• Step 4: Certificates are issued and can be retired to support reporting and public claims.

Because we have only recently launched, integrations will take time to complete across all platforms. In the meantime, an independent tracking option will be provided on this site so operators can log flights manually and still receive the correct certificate outputs.

Our preference is to automate the process end-to-end wherever possible. Automation reduces admin time, improves data quality, and provides operators and customers faster access to verifiable reporting outputs.

In short, no. When CORSIA methodologies were established in 2016, certified electric aircraft and charging networks suitable for baseline CO₂ calculations were not widely anticipated. As a result, CORSIA policy and eligible methodologies will take time to catch up with this category.

However, lack of CORSIA eligibility does not prevent Electric Book & Claim from being useful. Many organisations want credible, auditable emissions reductions for voluntary reporting, customer programmes, and internal decarbonisation targets, particularly where electric flight is already taking place.

Electric Book & Claim has therefore been designed initially for:

• Voluntary contributions from organisations that want to fund and claim verified reductions now.
• International operators producing less than 10,000 metric tonnes of CO₂ per year.
• US regional airlines and operators that sit outside the CORSIA framework.
• Flight schools and training fleets building credible low-carbon programmes.

Governments and policymakers have already shown strong interest in Electric Book & Claim, so eligibility and policy alignment may evolve in the future as electric aviation scales and baseline methodologies become more widely adopted.

In the meantime, purchasers can still use certificates to support transparent reporting and defensible claims, provided they use appropriate claim language aligned with their disclosure framework.

If you would like to purchase EBC Credits, discuss integrations, or review the accounting approach in more detail, please contact carbon@aerovolt.co.uk or call (+44) 790 33 11111.

If you are an operator or platform partner, it is helpful to include a short note on your fleet type, typical monthly flight hours, and whether you currently log flights through an operations platform or manually. This allows us to recommend the fastest implementation route.