| Product Capacity | DC output power | Common commercial configurations range from 20 kW to 60 kW for urban and fleet use, 120 kW to 240 kW for public fast charging, and 300 kW or more for selected high-power applications. | Rated power datasheet, output-power curve, thermal derating curve, and independent test report. | Confirm that the stated power is continuous rated output, not only peak output under ideal conditions. |
| Electrical Input | AC input requirements | Three-phase 380–415 V AC, 50/60 Hz is widely used for equipment manufactured for international markets; local grid compatibility must be confirmed before ordering. | Electrical schematic, input-voltage range, maximum input current, power-factor data, and installation manual. | Check compatibility with the destination country's nominal voltage, frequency, earthing system, and utility connection rules. |
| Vehicle Interface | DC charging connector | Connector selection should match the target vehicle population. CCS Type 2 is common in Europe and many international markets; CCS Type 1 is used in North America and selected other markets; GB/T is used in China. | Connector specification, pin assignment, cable rating, mating-cycle rating, and regional configuration list. | Do not assume that an adapter provides full compatibility; verify communication, locking, safety, and local legal requirements. |
| Core Safety Standard | DC EV charging equipment design | IEC 61851-1 and IEC 61851-23 are widely referenced for conductive charging systems and DC EV supply equipment. IEC 61851-24 covers digital communication between a DC charging station and an electric vehicle. | Valid certificate, test report, scope page, issuing laboratory details, and model-number match. | Check that the certificate covers the exact charger model, output rating, connector version, and intended market. |
| Connector Compliance | Vehicle coupler requirements | IEC 62196-3 is commonly used for DC vehicle couplers in applicable markets. Regional connector standards may differ and may require additional certification. | Connector test report, component certificate, temperature-rise test, insulation test, and ingress-protection evidence. | Verify connector type, current rating, cable length, mechanical locking, and compatibility with the vehicle communication protocol. |
| Communication | Station-to-backend protocol | OCPP 1.6J remains widely deployed, while OCPP 2.0.1 is preferable for new projects requiring improved device management, security, and smart-charging functions. | Protocol conformance statement, supported functions list, API documentation, and test-environment access. | Confirm support for remote start/stop, status monitoring, firmware updates, pricing, load management, and transaction records. |
| Vehicle Communication | ISO 15118 capability | ISO 15118-2 and ISO 15118-20 may support advanced functions such as Plug & Charge or bidirectional charging, but actual availability depends on the vehicle, backend, contract, and local regulations. | Feature-specific test report, supported message list, certificate-management method, and interoperability results. | Treat Plug & Charge or vehicle-to-grid claims as optional functions requiring a complete end-to-end demonstration. |
| European Market | CE-related compliance | Depending on the product design and destination market, relevant requirements may include the Low Voltage Directive, EMC Directive, RoHS Directive, and applicable harmonized standards. | EU Declaration of Conformity, technical file index, EMC and safety reports, RoHS material declaration, and risk assessment. | CE marking alone is not a complete certificate. Confirm the legal manufacturer, applicable directives, model scope, and supporting reports. |
| North American Market | Safety certification | Many North American projects require evaluation against applicable national standards, such as UL 2202 for EV charging system equipment and related personnel-protection requirements. | Certification listing, certification body record, field-evaluation requirements, and component recognition information. | Ask the local authority having jurisdiction which certification or field evaluation is required before shipment and installation. |
| Ingress Protection | Outdoor enclosure rating | IP54 is a basic outdoor benchmark; IP55 or IP65 may be preferable for exposed sites, subject to the enclosure design, drainage, connectors, and local climate. | IP test report, enclosure drawings, door-seal specifications, and installation limitations. | IP rating does not automatically prove resistance to flooding, salt spray, condensation, snow, or high-pressure washing. |
| Environmental Performance | Operating temperature and humidity | A typical commercial specification may cover approximately −20 °C to +50 °C, with power derating at high temperature. Cold-climate sites may require heating and condensation control. | Environmental test report, derating curve, heater specification, humidity limits, and altitude rating. | Match the specification to the actual site, including desert heat, winter cold, coastal salt, dust, altitude, and seasonal condensation. |
| Electrical Protection | Protection and safety functions | Expected functions may include overcurrent, short-circuit, overvoltage, undervoltage, surge, overtemperature, insulation monitoring, emergency stop, and residual-current protection as required by the target market. | Protection-function matrix, electrical schematic, fault-record examples, and safety test reports. | Confirm protective-device coordination with the upstream switchgear and verify whether external residual-current protection is required. |
| Energy Efficiency | Conversion efficiency and power factor | Well-designed modern DC chargers commonly target peak efficiency above 95% and power factor near unity under suitable load conditions; exact values vary by power level and operating point. | Efficiency map, power-factor curve, harmonic-current data, and test conditions. | Compare efficiency at 25%, 50%, 75%, and 100% load rather than relying only on the maximum headline value. |
| Installation | Site and civil requirements | Installation planning should cover utility capacity, transformer and switchgear sizing, grounding, cable routing, bollards, drainage, lighting, signage, accessibility, and emergency access. | Site survey template, foundation drawing, cable schedule, single-line diagram, and installation method statement. | Require a site-specific design review before production, especially for multi-charger load sharing or limited grid capacity. |
| Load Management | Dynamic power allocation | Dynamic load balancing can distribute available power among multiple dispensers and reduce the need for oversized grid connections. | Load-management logic, maximum simultaneous-output table, communication diagram, and failure-mode description. | Verify behavior during communication loss, backend outage, vehicle disconnection, and sudden site-load changes. |
| Factory Quality | Production and inspection controls | A credible supplier should maintain traceable incoming inspection, process inspection, end-of-line testing, burn-in or load testing, and serial-number-based quality records. | Quality-management certificate, sample inspection plan, factory acceptance test procedure, and anonymized test record. | Arrange a witnessed factory acceptance test for larger orders and ensure test results are linked to the shipped serial numbers. |
| Supplier Due Diligence | Legal and manufacturing capability | Supplier verification should cover legal registration, manufacturing location, export experience, engineering resources, subcontracted components, and financial continuity. | Business registration extract, factory audit report, organizational chart, production-capacity statement, and reference-project evidence without undisclosed assumptions. | Check that the contracting entity, invoice entity, warranty entity, and entity named on certificates are clearly identified and consistent. |
| Cybersecurity | Remote access and data protection | Internet-connected chargers should use encrypted communication, role-based access, secure credential management, controlled firmware updates, event logging, and vulnerability-response procedures. | Security architecture, penetration-test summary, update policy, password policy, backup procedure, and incident-response contact. | Change default credentials, restrict inbound access, separate charging equipment from critical business networks, and define software-support responsibilities. |
| Warranty | Coverage and exclusions | A commercial warranty commonly covers manufacturing defects for a defined period, often 12–36 months depending on the contract, operating conditions, and replacement terms. | Signed warranty document, covered-parts list, exclusions, labor terms, shipping responsibility, and extension options. | Confirm whether warranty coverage includes power modules, cables, connectors, displays, communication boards, labor, travel, and software. |
| After-Sales Support | Response and spare-parts service | Service quality should be measured through defined response times, remote diagnostics, escalation procedures, spare-parts availability, and local or regional technical coverage. | Service-level agreement, support hours, escalation chart, spare-parts list, repair procedure, and training plan. | Require measurable targets for first response, remote diagnosis, replacement dispatch, onsite attendance, and final resolution. |
| Commercial Acceptance | FAT, SAT, and payment milestones | Use staged acceptance: document review, factory acceptance testing, delivery inspection, site acceptance testing, and monitored operation before final payment. | Purchase specification, acceptance checklist, test scripts, defect-classification rules, and retention or milestone-payment terms. | Link payment to objective acceptance criteria and record all deviations, corrective actions, and outstanding spare-parts commitments. |
| Total Cost of Ownership | Five-year operating cost | Compare purchase price together with electricity losses, demand charges, network fees, preventive maintenance, spare parts, software subscriptions, warranty extensions, and downtime. | Five-year cost model, efficiency assumptions, maintenance schedule, software-fee schedule, and replacement-part pricing. | Use the same utilization, electricity tariff, climate, power level, and downtime assumptions for every shortlisted solution. |
| Recommended Decision Rule | Supplier selection score | Prioritize verified compliance, interoperability, installation readiness, cybersecurity, service capability, and lifecycle cost over the lowest initial quotation. | Weighted evaluation matrix, clarification log, risk register, sample test results, and signed technical-commercial offer. | Do not approve a supplier until every mandatory market requirement and every critical after-sales obligation has documented evidence. |
