I’ll be blunt with you: most “buyer’s guides” for finding EV charging suppliers in China have been written by people who have never actually ordered a product. They’ll tell you things like “make sure they have all the necessary certifications” and “definitely go to the factory.” But they won’t tell you what to actually look for at the factory, or what happens if things go wrong after you receive your shipment.
I have spent years working on this side of the industry. We supply distributors, EPC contractors, and fleet operators in over 100 countries. And the things that separate smart buyers from costly mistakes? They’re not what you’d expect.
Here are the actual 7 questions you should be asking.
Question 1: “Can I see the original third-party test report — not just the certificate?”
This is, hands down, the single most important question you can ask, and yet most people never even bother to ask it.
You see, it’s easy to fake a CE certificate. Or, more accurately, it’s easy to get a perfectly genuine CE certificate for a product that hasn’t been tested for compliance with CE standards. Some manufacturers test one configuration of a product, get the certificate, then ship you a different configuration without going through testing again.
What you want is to see the actual test report done by an independent lab — TÜV, SGS, Bureau Veritas, Intertek, etc. It’s a multiple-page document with actual test data, test results, pass/fail values, and it’s stamped with the lab’s logo. If your vendor can’t show you this, stay away from them.
At Hongjiali, we have CE, TÜV, SAA, CB, ETL, and RoHS certifications. All of them have test reports that we’ll be happy to provide you before you even make an order. That’s just how it is.
Question 2: “What happens if a unit fails in the field — specifically, what are your response time commitments?”
Every manufacturer will tell you they have “good after-sales service.” This is meaningless. What you need are specific, contractual commitments.
So, ask for:
- Response time to a service ticket (hours, not “as soon as possible”)
- On-site response time for hardware failures
- Resolution time commitment
- Whether they have service partners in your country or region
I know a distributor in the Netherlands who learned this one the hard way. He bought 40 units from a Chinese manufacturer with “excellent after-sales” service. When three units failed within six months, the manufacturer asked for photos and promised to send replacement parts within two to four weeks. Meanwhile, their end client — a shopping mall — had dead chargers in a prime parking spot for a month.
Our commitment is simple: 2-hour ticket response, 24-hour on-site presence for critical failures, 48-hour resolution. We have service partners across North America, Europe, Asia-Pacific, and IMEA. These aren’t marketing claims — they’re in the contract.
Question 3: “Show me a real Bill of Materials for this product.”
You’d be surprised how many buyers never ask this. And you’d be equally surprised how many manufacturers refuse to provide it — which says it all right there.
The BOM reveals what’s actually inside the box. Some things to check:
- Power modules: Are they using IGBT or Silicon Carbide (SiC)? Branded (Infineon, Wolfspeed, Mitsubishi) or generic? SiC is more expensive but provides 95–97% efficiency, while low-quality IGBTs only manage 85–91%. That difference shows up in your client’s electricity bill every single month.
- Contactors and relays: These components have the highest failure rate. Branded components like Schneider, TE Connectivity, or Omron have published failure rate data. Generic ones don’t — you have no idea what you’re getting into.
- Enclosure steel thickness: 1.5mm vs 2.0mm. It sounds like a small difference. It’s not when you’re dealing with salt air in a coastal environment.
A real manufacturer who’s proud of what they’re selling will be happy to answer your questions. A manufacturer hiding component substitutions will give you vague answers about “quality components” and “international standards.”
Question 4: “What is your actual production capacity, and can I verify it?”
Here’s a scenario that happens more often than anyone in this industry likes to admit: you place an order, get a promised delivery date, and then spend the next three months chasing your supplier while your project deadline passes.
You want to know:
- Their monthly production capacity for the specific model you’re ordering
- Their current order backlog and lead time
- Whether they own their own production facility or subcontract manufacturing
The last one matters. Some “manufacturers” are actually trading companies that outsource production. This isn’t automatically a problem, but quality control is one step removed, lead times are less predictable, and after-sales accountability gets murky.
Hongjiali operates a 30,000㎡ owned production facility in Shenzhen with 209 staff. We manufacture in-house. When we give you a delivery date, it’s based on our own production schedule — not a promise we’re making to a factory we don’t control.
Question 5: “Walk me through your OCPP implementation — specifically, which version and which features are actually live?”
This question will help you separate the real manufacturers from those who simply put “OCPP 1.6” in their spec sheet but don’t actually support all of the features within it.
OCPP (Open Charge Point Protocol) is the communication standard between chargers and backend management systems. The problem is that “OCPP 1.6 compliant” can mean anything — from full implementation to supporting just a handful of the forty-plus core features.
What you should be asking:
- Which OCPP version: 1.6J or 2.0.1?
- Have they completed formal OCPP certification testing with an accredited body?
- Which specific features are live: remote start/stop, smart charging profiles, real-time metering, OTA updates, load management?
- Does their cloud platform charge annual fees, or is access included?
Some manufacturers charge $500–$2,000 per year per station just to access the cloud platform. Hongjiali’s OCPP-compatible cloud management is included with the hardware — no mandatory annual fees for basic monitoring. We don’t hold basic functionality hostage behind a SaaS wall.
Question 6: “What’s your minimum order for OEM, and what does full customization actually include?”
If you’re building a charging network under your own brand, or if you’re an EPC contractor whose clients expect branded equipment, this question is a big one.
“OEM available” is one of the most overused phrases in Chinese manufacturing. What it usually means: we’ll slap your sticker on our standard product. What it should mean: we can change the enclosure, screen UI, cable specs, connector type, branding elements, and documentation to match your brand.
So ask them:
- What’s the minimum order for OEM branding? (Should be around 5–10 units for standard branding; higher for enclosure changes.)
- What does “OEM” actually include — just a logo, or full UI customization?
- What are the tooling costs for enclosure changes? (Expect $5,000–$20,000 for genuine new tooling.)
- Are samples available before the full order runs?
At Hongjiali, we have 80+ R&D engineers and 40+ patents. Full ODM — where we develop a new product from the ground up to your specifications — is something we genuinely do, not something we say we do. If you’re trying to build a product line rather than just resell rebranded commodity hardware, that distinction matters.
Question 7: “Give me three references — distributors in markets similar to mine.”
The final question, and the one most buyers forget to ask.
Not testimonials on a website. Not a list of logos. Actual contact information for distributors or contractors who have deployed this manufacturer’s products in your target market — North America, Europe, Australia, wherever you’re selling.
A real manufacturer with genuine traction in your target market will have those references readily available. A manufacturer that mainly sells domestically and is trying to break into exports will struggle to provide them.
When you speak to their references, ask:
- Did products arrive on time and to specification?
- What was the defect rate in the first 12 months?
- How did the manufacturer handle warranty claims?
- Would you order again?
Those four answers will tell you more than any factory visit.
A Note on Price
You’ll notice I haven’t talked much about price. That’s intentional.
In this industry, price is almost always the wrong starting point. The real question is total cost of ownership — what does this equipment cost to buy, install, maintain, and replace over a five-year horizon?
A charger that’s 15% cheaper upfront but has a 12% field failure rate in year two is not a bargain. A charger with proper certifications that can be legally deployed in the EU without re-testing is worth more than a cheaper unit that gets held up at customs.
We’re competitive on price — direct factory pricing, no middlemen, volume framework agreements typically 8–15% below spot quotes. But we’d rather lose a deal to a buyer focused purely on unit price than win it and spend the next two years managing warranty claims and unhappy end users.
About Hongjiali New Energy
We’ve been manufacturing EV charging equipment since 2016. Our 30,000㎡ production base is in Shenzhen. We have 209 employees, 80+ R&D engineers, and 200+ product models ranging from 7kW AC chargers to 2.6MW distributed charging systems.
Certifications: CE, TÜV, SAA, CB, ETL, RoHS, ISO 9001.
We supply Fortune 500 companies. We’re ranked #4 in floor-mounted charging stations on Alibaba.com. Our on-time delivery rate is 100%.
If you’re evaluating Chinese EV charger manufacturers and want straight answers to the seven questions above, contact us. We’ll respond within 24 hours with documentation, references, and pricing — no pressure, no bait-and-switch.