A good RMA (return merchandise authorization) process lets a distributor replace a faulty charger in days, not weeks, and gives the factory the data it needs to stop the same fault recurring. The essentials are simple: agree the process in writing before the first order, hold a small stock of the parts that fail or get damaged most often, and log every return with the serial number, symptom and photos.
Agree the Process Before the First Order
Put these points into your supply agreement or warranty terms, not into an email thread after the first failure:
- Warranty length and start date, for example from the date of shipment or from the date of sale to the end customer.
- What counts as a warranty fault and what does not, such as installation errors, physical damage or water entry through an open cover.
- Whether the factory replaces whole units, supplies spare parts or issues credit notes.
- Who pays freight for replacements and for faulty units sent back for analysis.
- Response times for a first reply, failure analysis and replacement.
- A free spare-parts allowance with each order, often expressed as a small percentage of units.
Our warranty and after-sales checklist lists the full set of terms to cover.
Which Spare Parts to Hold
| Part | Why it is replaced | Typical fix |
|---|---|---|
| Charging cable with vehicle connector | Driven over, dropped, worn latch, damaged pins | Swap the cable assembly on tethered or portable units |
| Grid plug adapters and plug leads | Bent pins, overheating from worn outlets | Replace the plug lead or adapter |
| Holster or connector holder | Broken by impact | Simple screw-on replacement |
| Front cover, display or LED panel | Impact or UV damage | Replace the cover assembly |
| Control or communication board | Component failure, surge damage | Board swap by a qualified electrician, or whole-unit replacement |
| RFID cards and mounting brackets | Lost or missing at installation | Ship from local stock |
| Storage cases and bags | Wear and tear on portable chargers | Ship from local stock |
For portable chargers, the most practical policy is usually to replace the whole unit and send the faulty one back for analysis. For wallboxes and stations, exchanging a cable or board on site is often faster than replacing the unit, provided the work is done by a qualified electrician and does not affect the product’s certification. Ask the factory which parts are designed to be field-replaceable.
A Simple RMA Workflow
- 1. Triage with the customer. Collect the serial number, purchase date, installation details, the fault code or LED pattern and a photo or short video. Many “faults” are resolved here: a tripped breaker, a vehicle schedule, a network setting.
- 2. Issue an RMA number so every return can be traced.
- 3. Replace from local stock for confirmed faults, so the customer is charging again quickly.
- 4. Report to the factory with the serial number, symptom, photos and your test results. Send faulty units or boards back in batches if the agreement requires it.
- 5. Receive failure analysis, with the root cause and corrective action.
- 6. Settle through replacement units, parts or credit as agreed.
- 7. Review monthly by failure type and production batch, and raise any pattern with the factory.
Track the Right Data
A spreadsheet is enough to start. Record date, serial number, model, batch, market, symptom, root cause, action and cost. A return rate that rises in one batch points to a production issue; a cluster of cable damage points to a product or packaging change, such as a stronger holster or clearer user guidance. Share the data with the factory every month, not only when there is a problem.
Prevent Returns Before They Happen
- Test samples and approve a golden sample; see testing a sample before a bulk order.
- Book a pre-shipment inspection; see pre-shipment inspection and AQL sampling.
- Give installers a clear manual and commissioning checklist.
- Warn users against extension cords and worn outlets, a common cause of plug damage.
How EVDANCE Handles After-Sales
EVDANCE products carry a 3-year standard warranty. Each distributor and private-label partner has a dedicated account engineer who handles failure reports, analysis and replacements, so questions go to one person who knows the order. See our distributor program for details.
Frequently Asked Questions
What is an RMA number?
A return merchandise authorization number is a reference issued before a product is returned, so each return can be tracked from complaint to settlement.
Should distributors repair chargers themselves?
Only simple, field-replaceable parts such as cables, holsters and covers, done by qualified staff and approved by the manufacturer. Internal repairs can affect safety and certification.
How many spare units should I hold?
Start with a small buffer based on your order size and adjust using your actual return data after the first months of sales.
Do I have to send faulty units back to China?
Not always. Many suppliers accept photos, videos and test results for low-value items and ask for physical returns only when analysis needs them. Agree this in advance.
Related Reading
- OEM and Private-Label EV Chargers: A Complete Guide for Brands
- EV Charger Warranty and After-Sales Terms: A Distributor’s Checklist
- Commercial EV Charger Maintenance Checklist
- Product Liability for Private-Label EV Charger Brands
Key Takeaways
- Agree warranty, replacement, freight and analysis terms in writing before the first order.
- Hold local stock of cables, plug leads, holsters, covers and a few whole units.
- Run every return through a numbered RMA with serial number, symptom and photos.
- Review return data monthly with the factory to fix root causes.
Sources & Standards
- ISO 9001 — Quality management systems, nonconformity and corrective action
- ISO 2859-1 — Sampling procedures for inspection by attributes