Global EVSE Sourcing White Paper

Wholesale Wall Connector Suppliers & Factories

Empowering Commercial & Residential Electrification with High-Performance EV Charging & Photovoltaic-Storage Ecosystems

Enterprise Overview

TONGXING NEW ENERGY TECHNOLOGY CO., LTD.

A National High-Tech Enterprise Pioneering Smart Charging Solutions

As a certified national high-tech enterprise with 23 years of expertise in the energy sector, Tongxing specializes in the research & development, production, and global distribution of innovative electric vehicle (EV) charging systems. Our comprehensive product portfolio spans from 3.5KW residential wall connectors to industrial-grade 960KW ultra-fast charging stations, complemented by integrated photovoltaic (PV) and energy storage solutions.

With a focus on reliability, grid stability, and carbon neutrality, we bridge the gap between traditional energy infrastructure and smart grid networks. Our global delivery capabilities support utilities, commercial real estate portfolios, and municipal bus fleets worldwide.

23+
Years Energy Experience
Continuous R&D in high-voltage power grids
45+
Countries Powered
Global installation from Europe to the Middle East
98.6%
Field Reliability Rate
Audited and certified by TÜV Rheinland in 2023
24m
Warranty Support
Coupled with life-time engineering service

MANUFACTURING & R&D CAPABILITIES

A powerhouse of smart assembly lines, technical patents, and full-stack software expertise.

72,000m² Intelligent Base

Equipped with 18 automated assembly lines and IoT-enabled quality control systems, achieving a 95% production automation rate for rapid OEM delivery.

200-Strong Workforce

Technical Operations: 140+ certified engineers
R&D Innovation: 20+ specialists in power electronics & embedded systems
Quality Assurance: 40-member ISO-9001 audit team

Full-Stack Competence

Hardware Mastery: Circuit topology optimization, thermal management, EMI/EMC compliance.
Software Expertise: OCPP 1.6J/2.0 protocol, energy dispatch algorithms, IoT cloud platforms.

Proven Innovation Track

12 utility model patents in charging connectivity. 78% year-on-year reduction in standby power consumption (2021-2023). Integrated dual-core redundancy protection system.

Core Advantages of Tongxing Wall Connectors

Why Tier-1 distributors and utility firms choose our electrical equipment.

Extreme Environment Resilience

Engineered with military-grade materials, our IP55/IP65-certified charging stations deliver unmatched performance in temperatures ranging from -35°C to 75°C, with reinforced waterproof/dustproof capabilities.

Universal Installation

Modular designs support wall-mounted, floor-standing, and portable configurations, adaptable to diverse scenarios:

Residential: Private villas, home garages
Commercial: Public parking, roadside stations, fleet depots
Industrial: Logistics hubs, mining sites

Smart Energy Integration

Proprietary OCPP 2.0-compliant systems enable:

◼ Seamless payment gateway integration
◼ Real-time solar energy allocation via PV/storage systems
◼ Remote monitoring through cloud management platforms

Future-Proof Charging

Wide output spectrum matching high power demands:

AC Charging: 16A-32A (7kW-22kW)
DC Fast Charging: Up to 720kW (10-minute 300km range replenishment)

Global Commercial & Industrial EV Charging Landscape

A strategic overview of grid challenges, electrification demands, and our optimized deployment strategy.

As governments globally push to outlaw internal combustion engines (ICE), the demand for scalable Electric Vehicle Service Equipment (EVSE) has transitioned from public charging networks to deep commercial and industrial integration. Modern corporations are no longer just installing single wallbox units; they are developing multi-site megawatt charging infrastructures to support fleet conversions, logistics services, and employee parking facilities.

With over 30 years of manufacturing excellence, our solutions power sustainable mobility across 45+ countries, from Iceland's Arctic conditions to Saudi Arabia's desert climates. Strategic partnerships with European grid operators and APAC infrastructure developers ensure localized compliance with IEC, CE, and UL certifications.

Our core focus centers on resolving grid peak-load restrictions. Implementing high-voltage DC fast charging requires dynamic management tools that interact directly with the local electrical grid. Without these tools, charging networks risk causing localized blackouts or triggering heavy demand charges.

Key Global Market Specifications We Support:

  • Europe (EN 61851 / IEC 62196): Support for 3-Phase Type 2 AC charging (11kW/22kW) and CCS2 DC fast charging up to 400kW. Full OCPP 1.6J/2.0 integrations with native billing.
  • North America (UL 2594 / SAE J1772): Split-phase Level 2 charging (7.4kW/9.6kW) and CCS1/NACS DC fast charging solutions.
  • Asia Pacific (GB/T / CHAdeMO): Localized compatibility with ultra-high voltage charging buses to optimize charging speed for major regional manufacturers.

Integrated Photovoltaic-Energy Storage-EV Charging Solution

Make Every Kilowatt-Hour Smarter, Make Every Charge Greener

Integrated PV Storage EV Charging Solution

Full-Scenario Energy Ecosystem Layout

Building Low-Carbon Infrastructure

Redefining the Charging Experience

Scenarios Covered: Urban commercial districts, highway service areas, public transport hubs, commercial parking structures.

Photovoltaic Direct Supply

Rooftop/canopy solar panels provide real-time power, meeting 30%-50% of charging demand at as low as 1/3 of peak grid electricity prices.

Energy Storage Peak Shaving

Store low-cost power during off-peak hours and release it during peak hours, reducing grid electricity costs by 40% per station.

Ultra-Fast Charging

Supports 120kW-960kW ultra-fast charging, adding 200km range in 10 minutes. AI power distribution improves multi-gun efficiency by 25%.

Optical storage charging system diagram

Optical Storage Charging System Diagram

Industrial & Commercial Integrated Photovoltaic-Energy Storage-Charging Solution

Industrial & Commercial Integrated Photovoltaic-Energy Storage-Charging Solution

Reduce Electricity Costs, Enhance Green Power Value, Create Sustainable Parks

Applicable Scenarios: Factories, office buildings, logistics parks, commercial complexes.

Three-Layer Energy Architecture:

  1. Power Generation Layer: Rooftop distributed photovoltaics with 50-500kW capacity, covering 15%-30% of enterprise electricity demand annually, eligible for national/local PV subsidies.
  2. Energy Storage Layer: Modular energy storage systems (100kWh-10MWh), enhancing peak-valley tariff arbitrage benefits by 30% while serving as a 72-hour emergency power supply.
  3. Application Layer:
    • Production Electricity: Prioritizes PV/storage power to reduce peak-hour grid dependence.
    • Vehicle Charging: Provides low-cost charging for employee EVs and logistics vehicles (priced at 50% of market rates).
    • Carbon Management: Real-time tracking of carbon emissions to assist in obtaining ISO 14064 certification and green factory ratings.
Indicator Traditional Solution Integrated Solution Improvement
PV Self-Consumption Rate 50% 85%+ ↑ 70%
Comprehensive Electricity Cost 0.85 USD/kWh 0.62 USD/kWh ↓ 27%
Annual Carbon Emission Reduction - 40%-60% Significant

Equipment Portfolio Specifications:

• Solar Modules: Monocrystalline PERC high-efficiency panels with ≥22.5% conversion efficiency.
• Energy Storage Systems: High-voltage cascaded technology, ≥6,000 cycles (80% DOD), system efficiency ≥95%.
• EV Chargers: Support 800V ultra-fast charging platforms, compatible with Tesla, BYD, and other mainstream models.
Residential Innovation

Make Homes Energy Centers, Unlock Smart Electricity Lifestyle

  • PV Self-Sufficiency: 6-12 solar panels generate 8-15 kWh daily, meeting household electricity and vehicle charging needs at as low as 0.3 USD/kWh (off-peak hours).
  • Storage Mutual Support: 5-15kWh home energy storage batteries store solar power during the day and switch to grid power at night, saving 3,000-5,000 USD annually on electricity bills.
  • Intelligent Charging: 7kW/11kW AC chargers support APP scheduled charging, with off-peak charging costs as low as 1/15 of fuel vehicle expenses.

Three Modes for Flexible Switching:

• Economic Mode: Prioritizes PV/storage power, automatically supplementing with low-cost grid power during off-peak hours.
• Low-Carbon Mode: 100% renewable energy use, achieving zero carbon emissions.
• Emergency Mode: Automatically switches to backup power during grid outages, ensuring 72-hour supply for essential appliances.

Policy Incentives: Eligible for national PV subsidies (0.3 USD/kWh) + local energy storage subsidies (up to 1 USD/Wh), with the shortest 3.8-year payback period.

Home Smart Energy Grid Modes

Residential Photovoltaic Storage System

PV Power Plant Coordination & Off-Grid Infrastructure

Advanced engineering to stabilize grid fluctuation and bring power to remote locations.

PV Power Plant Energy Storage Coordination Solution

Solve Curtailment Issues, Enhance Plant Revenue, Support Grid Stability

• Power Smoothing: Millisecond-level response to PV fluctuations, controlling output volatility within 5% (national standard ≤20%), meeting strict grid connection requirements.
• Peak-Valley Arbitrage: Store power during off-peak hours (23:00-7:00) and discharge during peak hours (17:00-21:00), profiting from 0.6-1.0 USD/kWh tariff differences.
• Virtual Power Plant (VPP): Collaborate with PV plants to participate in grid ancillary services, generating 30,000-50,000 USD annual revenue per MW of energy storage.

Off-Grid/Rural Area Solutions

Electrify Remote Areas Without Grid Connection

Applicable Scenarios: Rural areas with unstable grid access, scenic campsites, mining sites, construction projects.

• Configuration: Solar Array + Energy Storage System + DC EV Charger (supports standalone off-grid operation).
• Core Advantages: Grid-free operation with 72-hour continuous power supply (requires ≥4 hours of daily sunlight). Intelligent islanding protection improves survival rates to 90% in extreme weather. Containerized design allows rapid deployment within 72 hours.
Project Technical Indicators Advantage Comparison
Response Time ≤10ms Industry average ≤50ms
Cycle Life ≥6,000 times (80% DOD) Conventional batteries ≤3,000 times
System Efficiency ≥96% Industry average ≤93%
PV Scale Compatibility Distributed (50kW-5MW)/Centralized (10MW+) Full-scenario coverage

China Supply Chain Resilience & Cost-Efficiency Advantages

Why sourcing directly from our factory secures your market margins and procurement timeline.

The global EVSE supply chain remains highly volatile, affected by raw material price swings and shipping bottlenecks. By centralizing operations within China's premier high-tech manufacturing corridors, Tongxing offers B2B buyers unmatched vertical integration.

We handle everything internally: from raw component sourcing and PCB assembly to sheet metal casing fabrication and hardware testing. This integration shortens our typical lead times by 35% compared to European or American factories. It also allows us to implement strict quality gates at every stage of production.

Additionally, our localized partnerships with Tier-1 lithium carbonate suppliers and semiconductor suppliers shield us from raw material shortages. We maintain a continuous raw material buffer that supports uninterrupted manufacturing, even during peak global demand periods.

Vertical Integration

95% of sub-components are manufactured in-house, lowering assembly costs and removing third-party delivery delays.

Cost-Optimized Design

Advanced structural engineering reduces shipping weight by 15%, lowering ocean and land freight costs for distributors.

Rigorous QC

Every unit undergoes a full-load 24-hour burn-in and insulation resistance test before packaging.

Eco-friendly Production

Our manufacturing facility uses a grid-tied PV roof, qualifying our wall connectors for eco-conscious global tenders.

Localization Support & Compliance Guarantees

Ensuring smooth customs clearance, fast local installation, and regulatory peace of mind.

International Certifications

Our wall connectors and commercial stations carry international safety and performance marks. We maintain current certifications for CE (LVD/EMC), CE-RED, FCC, RoHS, and IEC 61851/62196. This compliance prevents regulatory bottlenecks during import and commissioning.

Custom Branding & Customization

We provide full OEM/ODM customization services. B2B clients can request customized enclosure designs, brand colors, custom-printed front panels, localized languages in the charger interface, and custom integrations for local billing apps.

Field Engineering & Logistics Support

Through our network of factory-trained distributors and localized service partners, we offer comprehensive integration support. We assist with initial system configuration, OCPP back-end commissioning, and supply spare parts to minimize downtime.

Technology Roadmap & Future Outlook

How Tongxing is designing today to support the electrical demands of tomorrow.

The EV charging landscape is evolving rapidly. Simple, static wall chargers are giving way to bi-directional, grid-interactive units. Tongxing's development roadmap focuses on building energy-smart hardware that integrates seamlessly with smart home grids and virtual power plants.

We are actively developing Vehicle-to-Grid (V2G) and Vehicle-to-Home (V2H) bi-directional power systems. These setups allow EV owners to use their vehicle's battery as emergency backup power during home outages or feed power back to the grid during high-tariff periods, creating new utility savings.

Additionally, we are rolling out advanced liquid-cooling thermal systems for our megawatt class DC fast-chargers. This technology enables ultra-fast charging speeds while maintaining low plug-and-cable weights, improving safety and user comfort.

Phase 1: Present

Full Implementation of ISO 15118 & OCPP 2.0.1

Enabling secure "Plug & Charge" capabilities and improving real-time cybersecurity protocols between charger, car, and backend.

Phase 2: 2025

Bi-directional V2G Commercial Rollout

Deploying affordable, dual-direction wallbox units to let fleets monetize stored energy during grid peaks.

Phase 3: 2026+

Liquid-Cooled Megawatt Charging Systems (MCS)

Super-speed charging nodes tailored for heavy-duty electric trucks and maritime cargo vessels.

Wholesale EV Charger Sourcing & Technical FAQ

Get professional answers to your core technical, electrical, and commercial sourcing questions.

What is the lead time for custom OEM wall connector orders? +
For standard specifications, the typical factory production time is 15-20 days. Custom OEM orders—which may include custom branding, paint finishes, customized packaging, or custom firmware—usually require 25-35 days from technical sign-off to port delivery.
Do your chargers support Dynamic Load Balancing (DLB)? +
Yes, our residential and commercial wall connectors support Dynamic Load Balancing (DLB). This technology monitors real-time household or building power use and adjusts the charger output dynamically. This ensures vehicles charge at maximum safe speeds without overloading the electrical system.
How does the OCPP 1.6J or OCPP 2.0.1 protocol integrate with third-party software? +
Our chargers use standard OCPP JSON configurations. You can point the charging station to your network management URL via the administrator portal or local web UI. Once connected, the charger sends real-time charging metrics, supports remote start/stop, and routes billing through your software.
What protections are built-in against electrical failures? +
Tongxing wall connectors are engineered with multi-layered safety protection: Overcurrent protection, Overvoltage/Undervoltage protection, Short circuit protection, Ground fault protection, Lightning surge protection (Type 2 SPD), Over-temperature safety foldback, and Leakage protection (Type A 30mA AC + 6mA DC).
What are the solar self-consumption advantages of the integrated system? +
Standard residential solar installations often lose excess energy back to the grid for low feed-in credits. Our integrated system stores this power in local battery banks or routes it directly to charge connected EVs. This integration increases local energy utilization from 50% to over 85%, significantly lowering monthly utility costs.
Can these wall connectors operate under harsh extreme winter or desert conditions? +
Yes. Our chargers are housed in heavy-duty poly-carbonate and aluminum enclosures rated for IP55 or IP65 ingress protection. Internal components are conformal coated to prevent damage from condensation or dust. The systems operate reliably in temperatures ranging from -35°C to +75°C.
How do you handle warranty repairs and parts replacement internationally? +
We provide a 24-month replacement warranty on all products. If a component fails, our engineering team diagnoses the issue remotely. If it is a hardware failure, we ship replacement parts via express air courier. We also offer life-time technical support to assist your local installation team.