EV
EV charging at home

Your buyer has one question.

"How's the battery?"

Answer it before it's asked. EV TrustSeal generates a verified battery health certificate from your car's official cloud, no workshop, no dongle, so you sell faster, at full price.

There are two types of EV sellers.The ones buyers negotiate against.And the ones buyers choose.

Check Your Battery

Connect free. See that your result is ready. Unlock for $99. No payment upfront.

End-to-end encryption
Official manufacturer data
VIN-locked certificate

Certificate Ready

Within hours of your audit

Your account stays secure.

Your login never touches our servers.

OAuth uses your manufacturer's own login screen.

Battery health data only. No car controls, no location.

Revoke access any time from your manufacturer app.

Three steps. No payment until your result is ready.

Step 1

Connect your car. Free.

Sign in with your manufacturer account, the same app you use every day. Read-only, battery data only, no payment.

Australia: Tesla and Polestar. North America and Europe: 46 brands including Hyundai, Kia, Volvo, Ford, Chevrolet, Rivian, Volkswagen, Nissan and BYD.

Step 2

Press Start Audit, plug in, wake up to your result.

One charging session is all it takes: from under 20% up to 80%, home AC charging only. Press Start Audit first, then plug in.

One uninterrupted session, button first, then plug. Your audit completes automatically at 80%. Keep charging as normal if you like.

Step 3

Unlock and share. $99.

Download your certificate and add it to your Carsales, Gumtree or Facebook Marketplace listing.

Buyers scan the QR code and verify on our servers, independent of you. The deal closes with proof attached.

VERIFIED

Battery Health Certificate

SoH 96.8% - EXCELLENT

VIN

5YJYG...

SOURCE

Manufacturer cloud

ISSUED

14 July 2026

Scan to verify

Verify at evtrustseal.com/verify/...

Your audit at a glance

One tap, one charge, done.

Connect. Free, 60 seconds.

LFP? Charge to 100% first.

Drive as normal until under 20%.

Press Start Audit, then plug in to AC.

Charge to 80% in one session.

Car fully drivable throughout.

Check Your Battery

Connect free. Pay $99 only when your result is ready. Private until you share it.

Data you can stake your sale price on.

Every reading comes straight from the manufacturer cloud that already governs your car. No dongles, no seller screenshots.

Official cloud data

Read via authorised API connection

Encrypted end to end

Read-only access. Battery data only

Original Equipment Data

No estimates, no dongles

VIN-Locked Report

Tied to your vehicle only

Supported vehicles

TESLA
POLESTAR
HYUNDAI
KIA
VOLVO
FORD
BYD
Volkswagen

A certificate buyers cannot argue with.

Buyer doubt survives screenshots and promises. It does not survive independent verification.

Read from the manufacturer's official cloud. Not your phone, not a screenshot, not a port anyone controls.

VIN-locked. Cannot be reused, transferred or borrowed by another listing.

Public QR verification. Every buyer scans it and sees our live record.

Independently verified proof defends your price before negotiation starts.

EXCELLENT

Vehicle

Tesla Model Y Long Range AWD - 2022

VIN

5YJ3E1EA.........

Odometer

38,241 km at time of audit

Audit date

19 May 2026

Est. SoH

~97.2%, calculated from manufacturer cloud data

Data source

Tesla official cloud

Verify

evtrustseal.com/verify/[certificate ID]

The battery question that killed deals. Until now.

The battery is the most expensive component in any used EV: $15,000 to $25,000 to replace. Sellers could not prove it, buyers could not verify it, so every deal rested on one stranger trusting another.

Thousands

What buyer doubt costs you

$99

The cost of proof

The research is in. Certified EVs win.

Up to 36% faster

Certified EVs sell faster than uncertified counterparts across six-country research.

£480 to £950 more

What buyers will pay extra for a used EV with a certified battery health report.

57% of buyers

Would consider a used EV they otherwise would not if it carries an independent certificate.

UK data agrees: certified EVs sold 7.3 days faster on average (43.1 versus 50.4 days). And a UK auction trial of cloud-based certificates, built from manufacturer API data exactly as ours are, found certified Teslas drew 20% more views, 34% more unique views and 10% more bids.

Auction houses and dealer groups already certify batteries before selling. Why would you sell privately without one?

Sources: Aviloo six-country research; Generational UK sales data, Oct 2025; Volteras UK trial, Jun 2026.

What sellers tried before. Why it was never enough.

Your word, your app screenshot, a dongle in a port you control: still your word. A workshop test is credible, but costly, slow, and hard to schedule.

Their word

Native app

OBD2

Workshop

EV TrustSeal

Independent

No

No

No

Yes

Yes

Verifiable record

No

No

No

Yes

Yes

Mfr cloud data

No

Seller's

No

No

Yes

Buyer QR verify

No

No

No

No

Yes

Time

n/a

n/a

1 to 2 hrs

3 to 5 hrs

Within hours

Cost

$0

$0

$50

$250 to $350

$99

Five grades. One clear answer.

Grade

SoH range

What it means for your sale

Excellent

95 to 100%

Peak condition. Buyer hesitation disappears. Full asking price.

Strong

85 to 94%

Normal wear, verified. Negotiation moves to the car, not the battery.

Moderate

75 to 84%

Noticeable degradation. Price fairly upfront and avoid collapsed deals.

Declining

60 to 74%

Significant degradation. Price accordingly, avoid post-sale disputes.

Replace

Below 60%

Replacement likely. Know before listing: price honestly, or weigh a trade-in.

Bands are 9 to 14 points wide, so an excellent battery never accidentally grades moderate. Your result stays private until you unlock and share it.

Selling without a certificate

The buyer asks. You have no answer. They negotiate on fear, not condition. You drop thousands because you cannot prove nothing is wrong.

Selling with a certificate

Yours is the listing buyers trust. The question is answered before it is asked. You kept the thousands. Your battery was fine. Now everyone knows it.

Check Your Battery

Connect free. Pay $99 only when your result is ready.

Picture a seller dropping $3,000 because they cannot prove what they already know.

The battery was fine. That is the sale EV TrustSeal exists to prevent.

R

"If you could provide an accurate legitimate 3rd party picture of my battery health for $99, I would pay this."

Recencybias3 / r/AustralianEV

O

"Second hand buyers of ICE vehicles pay for their own pre-purchase inspections. This is a very similar concept."

Ok_Lunch_2933 / r/AustralianEV

D

"As a buyer, the choice would be easy, if one owner is willing to do the test and another is not."

Dennis-v-Menace / r/AustralianEV

Smartcar API
Tesla Official Cloud
End-to-End Encrypted

Frequently asked questions

The audit is built around one clear charge session and a private result that only becomes public when you share it.

After. Connect free, and pay the $99 only when your verified result is confirmed ready. No charge to connect, no charge if we cannot generate your result.

Drive until the battery is under 20%, press Start Audit, then charge to 80% in a single AC session. DC fast charging does not qualify.

Yes. They scan the QR code and land on our verification page, served from our live record. You cannot edit what they see.

In Australia: Tesla and Polestar. In the US, UK and Canada: 46 brands including Tesla, Hyundai, Kia, Polestar, Volvo, Ford, Chevrolet, Rivian, Volkswagen, Nissan and BYD. Not on the list yet? Leave your email and you'll hear from us the day your brand goes live.

Within 3 to 5 percentage points, because we measure delivered energy across a wide charging window rather than quoting a dashboard estimate. That is comparable with hardware-based tests costing three times as much, without anything plugged into your car. Every certificate states its test conditions so a buyer can see exactly how the result was produced.

You don't pay. No result, no charge, ever. The audit needs one charging session that starts below 20% and runs to 80%. If your session gets interrupted, or you plugged in before pressing Start Audit, nothing is lost. Drive as normal until you're back under 20%, press Start Audit, and plug in again. The system does the rest and your audit completes automatically at 80%. You don't need to unplug or set an alarm. You'll wake up to your result.

No. The connection is read-only through your manufacturer's own authorised interface. Nothing is installed, nothing is written to the car, and no commands are ever sent. The audit simply observes one of your normal charging sessions. For LFP batteries, the pre-audit charge to 100% is the manufacturer's own recommended calibration practice. Tesla's manual asks LFP owners to do it weekly.

Free tracking apps show the owner a number on the owner's own phone. As a buyer you have no way to know if a screenshot is real, recent, or even from that car. A certificate exists because verification only counts when it's independent: VIN-locked, served from our servers, and checkable by the buyer without trusting the seller at all.

Yes. Your credentials go to your manufacturer's own login screen and never pass through our servers. Battery data only. Revoke any time.

One extra step, done first: charge to 100%, then drive under 20%, press Start Audit, and charge to 80%.

Only if you make it public. Private until you unlock and share the link or QR code.

Your car already measures everything that matters while it charges and reports it to your manufacturer's own cloud. We read that data through an authorised, read-only connection, then independently calculate how much energy your battery actually delivered across the audit window and compare it with your battery's original capacity. We don't just repeat the dashboard's opinion. We measure what the pack really did.

Then you found out first, and privately. Your result stays locked until you choose to unlock and share it. A lower grade you know about is a negotiating position: you price the car honestly and the deal holds. A lower grade a buyer's inspection finds later is a collapsed sale. Knowing first is the whole point.

No, and it never pretends to be newer than it is. Every certificate permanently states its audit date and the odometer reading at the time of the test, so a buyer always knows exactly what was verified and when. We recommend running your audit within 30 to 60 days of listing the car.

Yes, and you should. Send the seller this page. The audit runs from their driveway in about a day and the certificate arrives VIN-locked with a QR code you verify on our servers, independent of anything the seller shows you. And if a seller won't spend $99 to prove the battery's condition, that tells you something too.

No. Every certificate is VIN-locked to one vehicle and lives on our servers, not the seller's phone. The QR code resolves to our live record, so a forged or edited PDF fails the scan the moment a buyer checks it. If the scan and the certificate don't match, walk away.

One price. One certificate. No subscription.

Available now

Battery Health Certificate

$99 AUD / USD / CAD

GBP 79

Health grade

Verified SoH

Vehicle details

Public QR code

PDF download

Permanent verification URL

Coming soon

Battery Health + Vehicle History

$119 AUD / USD / CAD

GBP 99

Everything in the certificate

Finance status

Stolen check

Written-off status

Owner count

Accident history

Founding member offer: Buy the certificate now, get Vehicle History free at launch. Your $99 rate is locked permanently.

Stop guessing. Start certifying.

Your buyer is going to ask. Have the answer ready before they do.

Check Your Battery

Backed by manufacturer data. Verified by EV TrustSeal. Trusted by the EV community.

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