The first list is the least important part of finding a manufacturer. Most programmes fail at the shortlist stage, after three plausible suppliers have been asked three slightly different questions, and the answers cannot be compared. A structured process fixes that, and it starts before any supplier is contacted.
How to find a charger manufacturer: the five stages
Define the requirement, build a long list from evidence, screen with the same questions, shortlist on one specification, and pilot before committing.
Each stage produces something the next stage uses, and each is cheap compared with the one that follows. The screening stage is where the effort pays: five questions asked identically turn three quotations into a comparison rather than three opinions.
The process also protects the programme from the most common outcome, which is committing to a supplier whose capability was assumed from a catalogue and discovered to be different after the tooling was cut.
Stage 1: write the requirement before the list
The requirement is a document, and it is written first.
It states the product configuration: the power tiers, the port and plug arrangement, the markets, the packaging direction, the expected annual quantity and the launch window. It also states what is not negotiable and what is tradeable, because that distinction is what a supplier needs to propose a platform instead of a new design. Without it, every supplier answers a different question and every quotation is priced against a different product.
Stage 2: build a long list from evidence
The long list comes from what suppliers can show, not from what they claim.
Candidate sources are the platforms already in production, the products in the channel, trade exhibitions, and references from other buyers. For each candidate, record the platform that comes closest to the requirement and the evidence that it exists: the coil or output arrangement, the enclosure revision, the certification files and the markets they cover. A supplier whose closest platform is a drawing enters the long list as a development project rather than a platform programme.
Stage 3: screen with the same five questions
Five questions, asked in writing, to every candidate.
Which platform is closest to the requirement and what is running this month; what changes stay inside the existing tool; which certifications exist for which markets and which revision; what the minimum quantity and lead time are for that configuration; and what the factory measures on every unit, with the source of the limits. The answers are comparable, and they usually reduce a long list of eight to a shortlist of three without a visit.
Stage 4: shortlist and compare on one specification
The shortlist is compared on a single specification, issued identically.
Send the same document to each shortlisted supplier, including the packaging direction and the forecast, and ask for a quotation structured in the same lines: the unit price, the tooling where it applies, the packaging setup, the certification work and the accessory cost. Two quotations that price different scopes cannot be compared, and the differences usually hide in the packaging and the certification lines rather than in the unit price.
Stage 5: pilot before you commit
The pilot is the cheapest test of everything the documents claim.
A pilot order of a defined size verifies the process rather than the samples: the fixtures, the test limits, the packing, the traceability and the reporting. The output is compared with the specification and with the agreed acceptance criteria, and any gap is closed before the production order. Where the pilot reveals a fixture problem, it has cost a pilot; where it is discovered in production, it costs the batch.
| Stage | What you do | Output | Where it goes wrong |
|---|---|---|---|
| Requirement | Write configuration, markets, quantity, window | A document to send | Briefing by conversation |
| Long list | Collect candidates with evidence | Six to ten names with platforms | Directories and rankings |
| Screening | Ask the same five questions in writing | Three comparable answers | Different questions to each |
| Shortlist | Issue one specification and one cost structure | Comparable quotations | Quotations pricing different scopes |
| Pilot | Produce a defined order and verify it | A verified process | Committing on samples |
What disqualifies a supplier early
Four answers end a conversation, and all four arrive in the screening stage.
A platform that cannot be shown in production; a certification claim without a scope and a revision; a minimum quantity that changes between two emails without a change to the specification; and a refusal to state the source of the test limits. None of the four is about price, and each of the four predicts a problem that would appear later at a higher cost.
Keeping a second source warm
The second source is a decision made before it is needed.
A programme with one qualified supplier has no negotiating position and no answer to a capacity problem or a quality failure. The practical approach is to keep a second supplier at the pilot stage: specification issued, pilot run complete, terms agreed and the platform identified. That position costs a pilot and a conversation, and it is what allows a switch to be a schedule change rather than a restart.
FAQ
How many suppliers should we screen?
Six to ten candidates for the long list, reduced to three comparable answers, and two quotations priced against the same specification. Screening more than ten rarely adds information, because the answers start repeating. Six to ten candidates for the long list, reduced to three comparable answers and two quotations priced against the same specification, is the practical shape of the exercise.
Should we visit the factory before shortlisting?
The five screening questions usually reduce the list first, which makes any visit more productive. A visit is most useful when it follows the documents, because it can then concentrate on the two or three areas the answers made uncertain. Run the five screening questions first, because they reduce the list and make any visit more productive by concentrating it.
How large should the pilot order be?
Large enough to run the real process: a full packaging version, the actual fixtures, the production test with its limits and a shipment. Where the specification uses an existing platform, a pilot in the low hundreds per model is often enough to verify the process. Size it to run the real process: a full packaging version, the actual fixtures, the production test with its limits and a shipment.
What if the quotations differ by a large margin?
Compare the scope line by line before the price. A difference of a third is usually one supplier including tooling, certification work or packaging setup that the other priced separately, or one quoting a platform and the other a new design. Compare the scope line by line before the price, because a large difference usually means one supplier included work the other priced separately.
Next step
Send the configuration, the markets, the quantity and the launch window to Wecent Group through the contact page. The reply names the closest platforms, states which changes stay inside the existing tool and gives the minimum, the lead time and the certification scope. Related reading: OEM and ODM charger manufacturing, charger manufacturing services and the factory floor. External references: IEC standards, IEC Webstore, UL standards and certification, EU CE marking rules, TUV testing services and ICC Incoterms rules.
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