Executive Summary: 20-Port Community Charging Station for Global Buyers

Bottom line For estate and market deployments, the WL-CS20 pairs twenty metered sockets with two capped load groups and a 7-inch status screen. 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 actually moved which left a 35% 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: Hai Phong OEM ODM Sourcing Manager Sourcing Success

A single demo station ran at the buyer's depot for a month before the first PO was cut. 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, Tran Van Bao selected Wanlin as their EV charging manufacturing partner. The buyer admitted the deciding factor was a supplier who answered protocol questions in hours, not weeks.

• A 48-hour continuous-load rack cycles every station to catch relay and meter failures early
• UL, PSE and market-specific filing support is available for buyers serving North America and Japan
• OCPP builds support buyer-specified CSMS endpoints, security profiles and custom DataTransfer messages

The bike shed had a row of scorched sockets and a handwritten notice telling riders to bring their own timers.

Problem Analysis & Field Report: Why Global Buyers Need 20-Port Community Charging Station

What looked like a price problem turned out to be a reliability problem in disguise. 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 Hai Phong 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:

• single-rail busbars melt when every socket draws at once
• the fix was twin load groups with per-port breakers
• daily settlement exports turn charging into an auditable revenue line

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 Community Charging Station

What the pilot units had in common was a single mainboard with per-port metering and a contactor rated for real monsoon humidity.

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

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 Scenarios for Global Market

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

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:

• A 48-hour continuous-load rack cycles every station to catch relay and meter failures early
• UL, PSE and market-specific filing support is available for buyers serving North America and Japan

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

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

EV Charging OEM Process: From Inquiry to Shipment

The eight steps below are the ones every Wanlin export order actually follows. 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

Different markets, same conclusion, in the words of the buyers themselves.

• Somchai Prasert (EV Charging Station Distributor, Bangkok, Thailand): "The station we field-tested through the rainy season is the station we sell; our listing says IP54 and the field record proves it."
• Nguyen Hoang Minh (Charge Point Operator, Ho Chi Minh City, Vietnam): "The sample arrived with the OCPP conformance log in the box. That sounds small until you have integrated a pile without one."
• Tran Van Bao (OEM ODM Sourcing Manager, Hai Phong, Vietnam): "We stopped counting burned sockets because there are none left to count."

Frequently Asked Questions

Q: Why two load groups instead of one?

A: If a fault or overload hits one group, the other ten sockets keep charging, and each group draws against its own feeder cap.

Q: Can we bill riders per kWh?

A: Yes, every socket meters consumption and the station exports daily settlement files for wallet or cash reconciliation.

Q: How many stations can one CSMS manage?

A: There is no fixed limit; each WL-CS20 registers as one charge point with 20 connectors over OCPP 1.6J.

Q: What is the installation footprint?

A: Twin cabinets bolt side by side on a 1.6m wall span or back to back on a pedestal frame.

Q: Can we start with one cabinet and expand later?

A: Yes, the twin-cabinet design ships as one group first, with the second cabinet adding on the same feeder.

Project Summary

What actually moved By working directly with manufacturer Wanlin, the OEM ODM Sourcing Manager team in Hai Phong reached 35% 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