Best 20-Port Fleet Charging Depot Manufacturer | Hanoi, Vietnam - CE OCPP Wanlin

Executive Summary: 20-Port Fleet Charging Depot for Global Buyers

What changed for this buyer For delivery and rental fleets, the WL-DP20 pairs 20 metered sockets with a fleet card portal and smoke-linked safety. 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 data showed which left a 39% margin after the first sell-through cycle cleared 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

Case Study: Hanoi Parking Lot Operator Buyer Sourcing Success

The request that opened the account was a fault report, not a purchase order. Property developers now pre-wire bike sheds for charging because tenants ask before they sign.

After the operator's own four-week load-balance logging test, Faridah Yusof selected Wanlin as their EV charging manufacturing partner. What closed the deal was not the unit price but the OCPP conformance log in the appendix.

• every station completes a scripted OCPP session test against a live CSMS before it is boxed
• Per-port metering accuracy is verified against a class-1 reference meter, not marketing estimates
• custom tariff tables and display languages are flashed at the factory, not left for the buyer to manage

In the back office, the CSMS dashboard showed all 20 ports online with live meter values, three days after installation.

Problem Analysis & Field Report: Why Global Buyers Need 20-Port Fleet Charging Depot

Nobody flagged it at the packing station; the market flagged it first. A courier sort facility billed charging to a single overhead account and could not tell which rider cost what.

Field case: A delivery hub in Hanoi staggered charge windows on the WL-DP20 after 60 simultaneous plug-ins tripped the main breaker every payday week. The cabinet rode through the peak, and per-rider kWh exports let the hub move charging from overhead to a payroll deduction line, protecting a 39% margin on operations.

Why it matters for global buyers:

• simultaneous plug-ins trip depot breakers without staggered windows
• the fix was per-rider metering with payroll-ready exports
• staggered charging extends rental fleet battery life

Wanlin EV Charging OEM & ODM Services for Global Distributors and Brands

Wanlin runs OEM and ODM programs for buyers who want their own charging station line without building a factory. Customization covers:

• Cosmetics: cabinet colors, logo printing, port labels and decal sets on existing tooling from 50 units
• Firmware: tariff logic, load caps, timer behavior, display language and payment flows
• Protocol layer: OCPP 1.6J builds pointed at buyer-specified CSMS endpoints, security profiles and custom DataTransfer messages
• Exclusive tooling: new enclosure molds and cable-path tuning for brands that need a design nobody else can copy
• Connected builds: 4G cloud dashboards and fleet portals under the buyer brand when a software layer is required

Product Introduction: Wanlin 20-Port Fleet Charging Depot

Inside, the board layout keeps the 4G radio away from the contactor coil so sessions stay online when ports switch.

Core Features:

• China-Based Manufacturing: Wanlin produces in Shenzhen with in-house SMT lines, enclosure and cable assembly, and burn-in racks that load-test and cycle every finished station before packing
• Certification Transparency: CE, RoHS and IEC 61851-1 documentation is provided per model, and OCPP 1.6J conformance logs plus metering accuracy files travel with the shipment so containers clear without surprises
• Tested Claims: meter accuracy, RCD trip time and enclosure sealing are verified on samples from every production lot, and the reports are recorded per batch
• Private Label Support: cabinet colors, logo, firmware, tariffs, packaging, manuals, decals and spare kits are customized for each program
• Global Shipping Experience: we pack for charging distributors, property developers, fleet operators and e-mobility buyers across Southeast Asia, the Middle East, Europe, North America and Africa

Technical Specifications

Application Scenarios for Global Market

Certified EV Charging Manufacturing for Global Markets

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:

• every station completes a scripted OCPP session test against a live CSMS before it is boxed
• Per-port metering accuracy is verified against a class-1 reference meter, not marketing estimates

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.

Why Choose Wanlin as Your EV Charging OEM Manufacturer

Put side by side with the alternatives the buyer had been using, the difference showed up in test time, not just features.

EV Charging OEM Process: From Inquiry to Shipment

Moving from first contact to a sealed container took a sequence the buyer could follow in writing. A standard charging station OEM project then follows 8 steps:

1. Tell Us Your Target Market - Southeast Asia, the Middle East, Europe, North America, Africa or Latin America; each market may require different certifications, socket standards, voltage classes and manual languages
2. Select a Model Line - our team recommends WL-series platforms for your channel and price band, or works from a reference unit you send
3. Verify Documentation - request certificate files, OCPP conformance logs and test reports for the exact model before you commit
4. Confirm Customization - cabinet colors, logo, firmware behavior, tariff logic, payment flows and packaging
5. Sample Evaluation - verify meter accuracy, load balancing and CSMS integration on real samples before scaling
6. Confirm Production - after specifications, commercial terms and OEM details are locked
7. Quality Inspection - lot samples are tested and every finished station passes hipot, trip-time and burn-in racks before packing
8. Shipment - cartons leave FOB, CIF or DDP according to the agreed logistics terms

Customer Testimonials

Three buyers who ran the same evaluation shared what they told their purchasing committees.

• Somchai Prasert (EV Charging Station Distributor, Bangkok, Thailand): "We stopped counting burned sockets because there are none left to count."
• Nguyen Hoang Minh (Charge Point Operator, Ho Chi Minh City, Vietnam): "The first article matched the approved sample on meter accuracy, finish and weight. That almost never happens."
• Faridah Yusof (Parking Lot Operator Buyer, Hanoi, Vietnam): "The sample arrived with the OCPP conformance log in the box. That sounds small until you have integrated a pile without one."

Frequently Asked Questions

Q: How does the WL-DP20 handle 60 riders returning at once?

A: Staggered charge windows per port group spread the load so the depot breaker never trips at peak.

Q: Can we bill riders for their charging?

A: Yes, per-rider kWh and cost exports drop into payroll deduction files.

Q: What safety features guard overnight charging?

A: Per-port fuses, a cabinet RCD and a smoke detection link with the depot alarm system.

Q: Can the portal manage hundreds of cards?

A: Yes, the fleet portal handles card issue, quota and per-rider reporting at depot scale.

Q: Does it report to our CSMS?

A: Yes, OCPP 1.6J with per-connector metering over 4G.

Project Summary

What the field data showed By working directly with manufacturer Wanlin, the Parking Lot Operator Buyer team in Hanoi reached 39% 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

• Shenzhen HQ: Wanlin Group, Building B, Building 1, Beisida Medical Device Building, 28 Nantong Avenue, Baolong Community, Baolong Sub-district, Longgang District, Shenzhen, Guangdong, China