Data Compliance & Source Standards

EV Hub is a data-driven information platform. This page states, in plain terms, how we grade and date our sources, how we mark estimates versus official figures, how we correct errors, and what we will not do — fabricate data, ratings, or credentials. It should be read together with our Evidence & Data Methodology, Disclaimer, and Terms of Use.

1. Data verification tiering

Every vehicle record carries a source-type classification and a confidence level so readers can tell where a number came from and how much to trust it. The tiers we publish are:

Official specification — figures drawn from a manufacturer datasheet, an official price list, or a regulatory document (for example, an EU implementing regulation or a national tax schedule).
Manufacturer claim — figures sourced from manufacturer publications but not independently verified by us.
Independent test / third-party — figures attributed to whoever ran the test or published the measurement, never presented as our own.
Estimate — values we compute or benchmark (freight, certification, registration, and the landed-cost total). These are always labelled as estimates, never passed off as confirmed figures.

Where a field has no source, we leave it unstated (shown as "N/A") rather than invent a value. We do not convert between range standards (CLTC, WLTP, EPA) to fill gaps, because those standards measure differently and a conversion would be a fabricated number. Full detail is in our Evidence & Data Methodology and the data provenance document.

2. Source standards

We grade sources into four tiers and use the highest available tier for any figure stated as fact:

Tier 1 — Official and regulatory: EU implementing regulations and TARIC entries, national tax authorities, customs guidance, type-approval databases, official manufacturer datasheets and price lists.
Tier 2 — Authoritative media and analysts: established trade press and recognised analysts, attributed to the outlet rather than stated as our own finding.
Tier 3 — Industry and trade sources: freight benchmarks, homologation service providers, industry association publications, company statements. Treated as estimates.
Tier 4 — Community and user reports: forums and social posts, used only to find a lead worth checking, never as the sole basis for a factual claim or price.

When two credible sources disagree, we prefer the higher tier and note the discrepancy rather than silently picking the number that reads better. Freshness is part of accuracy: data-bearing pages carry a verification date, so a stale figure is visible as stale.

3. What we will not fabricate

We commit, explicitly, not to do any of the following:

Fabricate or invent specifications, prices, range figures, tariffs, or ratings.
Publish reviews, scores, or aggregate ratings we did not actually produce. Our comparison tool shows specifications only — it contains no ratings, reviews, or seller claims.
Present a manufacturer's or a third party's test result as a test we ran.
Convert between CLTC, WLTP, and EPA range figures to fill missing data.
Claim certifications, awards, testing facilities, client relationships, or editorial staff we do not have.
Blend specifications across trims or range standards into a single "representative" number.

Where our author's manufacturing-side experience informs an analysis, we label it as perspective, not as a measured result — see our Evidence & Data Methodology.

4. Estimates are labelled

Freight, certification, registration, and inland-transport figures are benchmark-based estimates, not quotes. Pages that use them mark them as estimates with their basis shown. The landed-cost calculator and comparison tool display reference estimates only; they are not quotes, offers, or predictions, as stated in our Disclaimer and landed-cost methodology.

The distinction we draw is simple and we keep it consistent site-wide: an official figure (a duty rate, a VAT rate, a published specification) is shown as fact and dated; an estimate (freight, certification, the landed-cost total) is shown as an estimate and marked as such on the page. We do not let an estimate silently pose as an official figure, and we do not let an official figure be mistaken for a quote.

5. Correction process

We fix errors and say so. If you believe a figure, specification, or factual claim is wrong:

Email us at [email protected] with the page URL and the correction, ideally with a source we can check.
We review the claim against the best available source. We acknowledge substantive correction reports and, where a claim is wrong, correct it rather than quietly swapping it out.
Material corrections to dated figures or factual claims are recorded on the page, not silently changed.

We also track corrections at the editorial level — see the Editorial Independence Policy.

We do not publish "corrected" numbers that are really new estimates under an old date. When a correction changes a figure that other content depends on — a duty rate, a price, a range value — we update the dependent figures in the same pass so the site does not contradict itself.

6. Independence and disclosure

Our operator, EV Hub (Jinzhou Chengguang Power Source Co., Ltd.), works in the EV battery supply chain. That ownership is a commercial fact we disclose on our Editorial Independence Policy and About page. It does not change our data rules: no brand, supplier, or commercial partner gets to approve, edit, or remove a figure because of a business relationship. A factual claim still has to stand on a citable source, and a conflict of interest is disclosed rather than hidden.

7. Machine-readable data and license

We publish structured datasets at our /data/ endpoints (vehicles, brands, tariffs). These are the same single source of truth that powers the site — we do not maintain a separate, richer internal dataset.

License: each dataset is released under the Creative Commons Attribution 4.0 International license (CC BY 4.0). You may use, adapt, and redistribute it, including commercially, provided you give appropriate credit, link to the license, and indicate changes.
Scope: the license covers the structured data. Editorial articles, prose, and page design are not part of the dataset license and remain subject to our Copyright and Takedown Policy.
Accuracy: the datasets reflect the site's published estimates and official figures at generation time. Where a value is an estimate, treat it as such.

Machine-readable access for search engines and AI assistants is permitted as described in our llms.txt file and robots.txt.

8. Freshness, dating, and provenance fields

Every vehicle record carries provenance metadata that readers can inspect on the page: a source description (data_source), a verification date (data_updated), a review flag (data_reviewed), a tier (1–4), and a confidence level (high / medium / low). The landed-cost figure is always presented as an estimate and stamped with its verification date. Where a field has no confirmed source, it is rendered as "N/A" rather than filled in. We publish the field convention in full in the data provenance document.

We do not run battery, range, or safety tests, and we do not present a figure as a measured result we produced. Where independent test data is cited, it is attributed to whoever ran the test. Our author's production-side experience is used only as labelled context and perspective, never as a substitute for a citable source on a factual claim.

9. Data access and attribution

You may access the structured datasets directly at the /data/ endpoints, and you may use them under the CC BY 4.0 license described above. If you republish the data, credit EV Hub and link to the license, and do not imply that we endorse your use. If you substantially transform the data, say so. We ask that you not pass a landed-cost estimate on as a confirmed figure without carrying its estimate caveat.

Access to the endpoints is provided as-is and without a service-level commitment; we may rate-limit or change the endpoints as needed to protect the site. Automated access should be polite, identify itself, and follow our robots.txt.

10. Related policies

Questions about this policy: [email protected]. Address: Jinzhou, Hebei, China.