Liquid-Cooled Heavy-Duty DC Charger & PV-Storage-Charging Microgrid Solution for Open-pit Mine
Our liquid-cooled heavy-duty DC charger covers power range from 240kW up to 1070kW, paired with mature energy storage and microgrid technology. The complete PV-storage-charging microgrid system integrates power supply, energy storage and heavy-truck charging equipment. It delivers stable power supply for weak-grid or off-grid mining sites, with abundant overseas EPC project delivery records across global mining regions.
Important Note: Standard equipment is designed only for surface open-pit mine deployment. Underground explosive hazardous zones require full explosion-proof modification and local mining safety certification. Standard units cannot be directly deployed underground.
Core Key Advantages
- Deep technical accumulation in energy storage & microgrid: Outstanding performance under weak-grid and off-grid mine conditions. The microgrid controller realizes seamless switching between grid-tied, island off-grid mode, continuous power supply for mining haul truck charging even with unstable utility power.
- Rich overseas EPC project track record: Many completed turnkey EPC mining projects across multiple global regions. The team has full experience in site survey, engineering design, supply, installation, commissioning and after-sales service for cross-border mine energy projects.
- Full PV‑storage‑charging microgrid package: One-stop solution including power source, containerized energy storage system and liquid-cooled heavy-duty DC chargers. Flexible configuration to match mining fleet scale, solar resource and local grid conditions.
- Liquid-cooled heavy-duty charging design 240‑1070kW: Closed-loop liquid cooling for power modules and charging cables. Low thermal rise, stable continuous high-current output, less power derating in high-temperature, high-dust open pit mines. Wide DC output voltage compatible with all mainstream electric mining haul trucks.
- Intelligent energy management system: Real-time power dispatching, peak shaving & valley filling, load shedding protection, dynamic load balancing. Reduce demand charge and avoid transformer overload for mine charging depot.
Typical Application Scenarios
- Open-pit mines with weak utility grid or fully off-grid remote mining sites, no stable power access
- Large-scale electric haul truck fleet depots requiring high-power continuous fast charging
- Overseas mining projects adopting full turnkey EPC delivery model
- Mine sites with abundant solar resources to build PV + storage + charging microgrid for green power consumption
- Coal, iron, lithium, bauxite open-pit mines, mixed fleet including mining trucks, engineering vehicles and site logistics vehicles
System Technical Specifications
| Item | 240kW | 480kW | 1070kW |
| Rated Charging Output Power | 240kW | 480kW | 1070kW |
| DC Output Voltage Range | 200‑1000Vdc | 200‑1000Vdc | 200‑1000Vdc |
| Max Single Gun Current | 250A | 600A | 2400A |
| Cooling Method | Liquid cooling | Liquid cooling | Liquid cooling |
| Protection Grade | IP54 | IP54 | IP54 |
| Ambient Temperature | -30℃ ~ +55℃, limited power derating at extreme high temperature | ||
| Microgrid Mode | Grid-tied / Island off-grid seamless switching, black start support | ||
| Storage Battery Type | LiFePO4 container BESS | ||
| Communication Protocol | OCPP 1.6J / 2.0.1, Modbus TCP, remote EMS monitoring | ||
| Input AC | 3‑phase 380‑415Vac, 50/60Hz | ||
EPC Project Investment Scale & Financial Estimation (Preliminary Feasibility Reference)
Below is the preliminary CAPEX estimation for a typical open‑pit mine PV‑storage‑charging microgrid EPC project, for early project evaluation only. Actual quotation will vary by site terrain, solar irradiation, local labor, import tariff and civil engineering.
| Project Scale Example | 4 units × 480kW liquid-cooled chargers + 2MW/8MWh container BESS + 5MW PV array |
| Total Estimated CAPEX Range | $2.8M ~ $4.2M (EPC turnkey, including equipment, civil, installation, commissioning, engineering) |
| Annual OPEX | 2%~3% of total CAPEX per year (maintenance, spare parts, site service, insurance) |
| Main Revenue & Saving Sources | Reduce utility peak electricity bill, PV self-consumption, avoid grid upgrade investment, peak shaving |
| Estimated Simple Payback Period | 6 ~ 9 years (depends on local electricity tariff, solar resource, daily charging hours) |
| Project Life Cycle | 15 years for charging equipment; 10~12 years for battery (battery replacement required after cycle degradation) |
Mine‑Site Key Considerations
- Off-grid microgrid design Off-grid mine needs sufficient BESS capacity and black-start PCS. Load management is critical to avoid overloading when multiple mining trucks charge simultaneously.
- EPC boundary clarification Confirm scope including civil work, medium voltage cable, transformer, permitting, customs clearance and training before signing EPC contract for overseas mining projects.
- Liquid cooling maintenance Regular coolant inspection and filter replacement required. Less maintenance than air-cooled units in heavy dust mine.
- Site survey prerequisite Solar irradiation, land space, geological condition and existing power capacity must be surveyed before microgrid sizing.
FAQ
What mine site conditions suit this PV-storage-charging microgrid solution?
It is best suited for open-pit mines with weak grid or fully off-grid remote mining zones. It can keep power stable for electric haul truck charging even when the public power supply fluctuates or fails.
What is included in your turnkey overseas EPC service?
Our EPC scope covers engineering design, full equipment supply, civil construction guidance, on-site installation supervision, system commissioning and operator training. We have completed multiple mining EPC projects in overseas regions.
What are the benefits of liquid-cooled mining heavy-duty chargers?
Closed liquid cooling keeps the charger temperature stable. It supports continuous high-current charging and reduces power derating under high-temperature and dusty open-pit conditions, delivering higher reliability than air-cooled charging piles.
Can we expand the system if we add more electric mining trucks later?
Yes. The whole system adopts modular design. Additional chargers, PV panels and energy storage containers can be added step by step. The EMS energy management system supports expansion without replacing core controllers.
What certifications can be provided for overseas mining projects?
Main equipment supports CE certification. We can apply for other regional certificates according to project requirements and support third-party inspection as requested by mine owners.
Can this system be installed in underground mines?
Standard devices are designed for surface open-pit mines only. Underground hazardous explosive environments require explosion-proof modification plus local mining safety certification. Standard equipment cannot be directly used underground.
Get In Touch
Please provide mine location, daily haul truck quantity, local grid condition and available land area. Our EPC energy team will deliver customized PV-storage-charging microgrid proposal and refined financial model for your mining project.
