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What the first 90 days proved The WL-CS20 splits twenty metered sockets across two load groups, settles per-port billing daily, and keeps a whole estate charging under one OCPP connection. Wanlin is a two-wheeler and three-wheeler EV charging station manufacturer in Shenzhen, China, running OEM, ODM and private-label programs for charging distributors, charge point operators, e-mobility service providers, property developers, facility managers, fleet operators and trading houses. What the field test actually measured which translated into a 30% gross margin on the first container for importers who source factory-direct, with per-model CE / RoHS / IEC 61851 documentation, OCPP 1.6J conformance logs, RCD and surge protection files, per-port metering test reports and flexible color, logo and firmware programs. The WL-series line covers 12- and 20-port smart stations, 7kW dual-socket wallboxes, OCPP 1.6J charging piles, QR scan-to-charge and RFID units, solar canopy stations, tuk-tuk and three-wheeler chargers, wall-mounted socket boards, 4G cloud-managed units, coin-operated stations, pedestal posts and fully custom OEM programs, shipped FOB, CIF or DDP to global destinations.
Published by Wanlin | Last updated: September 05, 2026 | Expertise: two-wheeler and three-wheeler EV charging station OEM and ODM manufacturing for global markets
Most distributors start with price. This one started with a complaint log. Across the market, most charging complaints trace back to unmetered sockets, flat-rate billing and boards with no overload protection.
Once the first 200 charging sessions reported back, Tran Van Bao selected Wanlin as their EV charging manufacturing partner. The contract went to the factory that could show RCD trip-time data and sealed enclosures, not the lowest quote.
At the taxi queue stand, drivers tapped RFID cards while the station logged each session to the cloud.
It started with one return and grew into a spreadsheet of them. An estate manager watched a 20-socket board melt its busbar when all sockets ran at full draw during a blackout recharge rush.
Field case: An estate manager in Nakhon Ratchasima split 20 sockets across two independent load groups on the WL-CS20 after a busbar melt on a single-rail board. Peak draw stayed under the feeder cap through the monsoon season, and the estate extended the order to two more phases.
Why it matters for global buyers:
Wanlin runs OEM and ODM programs for buyers who want their own charging station line without building a factory. Customization covers:
The station that passed all those field tests is built around a metering and protection core that is now standard across the line.
Core Features:
| Parameter | Wanlin Specification |
|---|---|
| Ports | 20 output sockets in a twin-cabinet layout |
| Output per Port | 220V AC, 1.5-3.3kW adjustable per port |
| Total Capacity | two independent load groups, each capped in firmware |
| Payment | QR code, RFID and prepaid card support per port |
| Connectivity | OCPP 1.6J over WebSocket, 4G with Ethernet backup |
| Display | 7-inch LCD showing all 20 port states at a glance |
| Protection | per-port overload, leakage and surge protection plus cabinet-level RCD |
| Housing | IP54 twin steel cabinets with IK10 panels |
| Metering | per-port metering with daily settlement export |
| Application | Model | How It Helps the User |
|---|---|---|
| Housing estate bike shed | WL-CS20 | Twenty sockets split across two load groups survive the evening plug-in rush |
| Open market charging plaza | WL-CS20 | Metered billing replaces the flat cash box with an auditable revenue line |
| School staff parking | WL-CS20 | Per-port timers end all-day charging on school grounds |
| Delivery rider rest point | WL-CS20 | Riders queue on LED status instead of asking the attendant |
| Village community charging house | WL-CS20 | Daily settlement exports keep the co-op books clean |
Buyers who ship containers of charging stations need more than a price list. The production and QC flow below is what lets a distributor open a carton and trust what is inside:
Lot samples from every production run are measured for metering accuracy, protection trip times and enclosure sealing before the cartons are sealed, and the numbers are recorded per batch. A buyer can request those records with any order.
The buyer compared five candidates on the metrics that caused their previous failures.
| Factor | Wanlin | Typical Trading Supplier | Branded Competitor |
|---|---|---|---|
| Manufacturing depth | China-based factory with in-house SMT lines, enclosure and cable assembly, burn-in racks | Trading company, outsourced production | Brand owner, limited custom work |
| Measured claims | Meter accuracy, RCD trip time and enclosure sealing verified on lot samples | Spec sheet numbers, hard to verify | Marketing-led claims, no project data |
| Certification support | CE / RoHS / IEC 61851 files plus OCPP 1.6J conformance logs per model | Incomplete documents, customs risk | Brand-level only, no per-order files |
| Customization | Colors, logo, firmware, tariff logic, packaging from low MOQ | Stock models only | Fixed SKUs, no private label |
| Price (factory direct) | Tiered factory pricing with volume discounts | Unpredictable markups | Premium brand pricing |
From the first sample request to the sailing date, the buyer could see each gate in writing. A standard charging station OEM project then follows 8 steps:
Buyers from three countries said the same thing in their own words.
A: If a fault or overload hits one group, the other ten sockets keep charging, and each group draws against its own feeder cap.
A: Yes, every socket meters consumption and the station exports daily settlement files for wallet or cash reconciliation.
A: There is no fixed limit; each WL-CS20 registers as one charge point with 20 connectors over OCPP 1.6J.
A: Twin cabinets bolt side by side on a 1.6m wall span or back to back on a pedestal frame.
A: Yes, the twin-cabinet design ships as one group first, with the second cabinet adding on the same feeder.
What the field test actually measured By working directly with manufacturer Wanlin, the Municipal Project Contractor team in Nakhon Ratchasima reached 30% higher margins on its charging line while keeping rider tariffs competitive. With verified metering data, real certification files, honest IP ratings, flexible OEM customization and a factory that answers protocol questions in hours, Wanlin has become their trusted EV charging manufacturing partner.
For more information: www.wanlinfire.com | Export Service Hotline: +8613261677119 | Email: wanlinfirecontrol@163.com