The 300kW dual-gun modular AC-DC fast charger targets public parking hubs and retail destinations, where uptime and quick service access decide revenue. With CCS1 and NACS outlets, a 200V-1000V DC window and OCPP 1.6J connectivity, it delivers predictable high-power charging while keeping installation and commissioning simple. This DC fast charging station pairs high utilisation with low maintenance overhead.

1. Modular AC-DC Power Topology and Conversion Chain An active front end feeds isolated DC/DC stages inside each cabinet, so grid harmonics stay low while output voltage follows whatever the battery management system requests. Bidirectional-ready bus design lets the same platform accept solar or battery energy storage input without a second conversion stage. A single controller supervises rectification, isolation and metering, which keeps the power path short and trims conversion losses across the whole load range. The 300kW dual-gun unit is built around a modular AC-DC topology that rectifies three-phase AC input onto a regulated DC bus before power reaches the vehicle inlet. Matching power modules are documented in the datasheet.

2. 200V-1000V Wide Voltage Output With Constant Power Pre-charge sequencing limits inrush current, shielding vehicle contactors and DC link capacitors from stress during every plug-in. Output spans 200V to 1000V DC, covering 400V and 800V vehicle architectures from compact city cars to heavy-duty tractors. Voltage and current limits are negotiated over the control pilot, then confirmed by the battery management system before the DC contactors close. Precision metering at the outlet delivers Class B accuracy, so billed energy matches what the vehicle actually receives. Cable assemblies rated 250A to 400A are matched to each outlet, and CCS1 and NACS leads are available in lengths from 4 to 8 metres.

3. 40kW Hot-Swap Power Modules and N+1 Redundancy Replacement modules ship pre-calibrated, and the controller recognises a new unit automatically once it is fully seated. Speed-controlled fans and intelligent airflow keep acoustic noise near 65 dB, which suits residential, hospital and retail locations. Modules slide out from the front, so service engineers never need rear clearance in tight parking layouts or wall-adjacent installations. Thermal design holds junction temperatures stable at 50 degrees ambient, so the DC fast charger sustains rated output in hot climates. A shared DC bus lets any module feed any outlet, removing the fixed pairing that limits conventional charging piles. Compatible EV charging connectors are listed separately.

4. Dynamic Power Allocation Across Dual Outlets Because capacity follows demand, the DC fast charging station avoids the idle-outlet penalty that drags down utilisation on paired connectors. Priority rules can reserve one outlet for emergency fleets while the other follows a normal queue, all configured remotely. Scheduling profiles prioritise buses in the morning and light vehicles in the evening without manual intervention. Session logs record delivered energy per outlet, which simplifies billing, reconciliation and fleet cost allocation. Operators set allocation rules per site, per connector or per tariff window through the cloud portal, with no on-site reprogramming. When a second connector activates, the controller splits output according to state of charge rather than a fixed schedule. Site rules are tuned from the operator portal.

5. Outdoor IP55 Enclosure Built for Public Sites Each unit is ingress tested at the factory and ships with CE documentation covering insulation and earth continuity checks. Surge protection, residual current detection and emergency stop are integrated, and the cabinet is engineered for a ten-year outdoor service life. A powder-coated steel body with anti-corrosion treatment suits coastal, industrial and roadside installations. Ambient range runs from minus 30 to plus 55 degrees Celsius, with internal heaters protecting the 7-inch display in freezing conditions. Cable management hooks keep CCS1 and NACS leads off the ground, extending connector life in busy public car parks. The bonded anti-glare touchscreen stays readable in direct sunlight and remains responsive through gloved operation. Installation drawings cover plinth and cable routing.

6. Smart Payment, OCPP Management and Energy Integration Remote diagnostics, firmware updates and tariff changes are pushed over the air, cutting truck rolls for routine maintenance. Multi-language interface, configurable tariff screens and branded start pages help operators monetise the charging session itself. The controller exposes smart charging profiles, so a central system can cap site load during peak tariff periods. Communication runs over OCPP 1.6J, so the station integrates with almost any back office without custom middleware. An open API and Modbus TCP option let the DC fast charger link with solar, storage and building management systems. Local storage keeps sessions running if connectivity drops, then synchronises records once the link returns. Backend integration follows the OCPP specification.

Deployment Support and Accessories

Projects usually pair the cabinet with Type 2 to Type 2 cables and a OCPP protocol controllers, all supplied from one factory. Engineering teams can review the company profile before order, while commercial questions go through the contact our team page. Standard builds ship in four to six weeks, and documentation covers wiring, grounding and network setup.

Frequently Asked Questions

What output voltage range does the 300kW unit support?

The charger delivers 200V to 1000V DC at up to 400A, so it serves 400V passenger cars and 800V heavy vehicles from the same outlet. Constant power holds 300kW from about 500V upward, which shortens charging time on modern high-voltage packs.

How does DCDC architecture differ from a conventional AC-DC charger?

A DCDC stage accepts a DC bus from solar or battery storage and converts it directly, skipping one rectification step. That raises round-trip efficiency and lets the modular AC-DC platform operate during grid outages when paired with a BESS cabinet.

Can the two guns charge at the same time at full power?

Yes, with dynamic allocation. Total capacity is shared, so one vehicle can take the full 300kW, or two vehicles can split it according to state of charge. Matrix switching means any module can serve either outlet, and rules are configured remotely.

Which OCPP version should an operator choose?

OCPP 1.6J covers the widest installed base of back offices today. OCPP 1.6J is specified here for certificate handling, plug and charge support and stronger message security. Both profiles work with standard roaming hubs, and the protocol controller datasheet explains the mapping.

What protection level is needed for roadside installation?

IP55 is the baseline for outdoor public sites, combined with surge arrestors, residual current detection and an emergency stop. Coastal or dusty locations should add the anti-corrosion coating and filter service kit.

How is maintenance handled when a power module fails?

Modules are hot-swappable from the front. A technician isolates the affected unit, slides it out and seats a pre-calibrated replacement while the second outlet keeps serving traffic. N plus one redundancy keeps rated output available throughout.

Does the station support solar and battery storage integration?

The DC bus is storage-ready. Solar MPPT or a BESS cabinet can feed the link directly, and the controller can cap grid import during peak tariffs. This suits microgrid and carport projects where demand charges dominate operating cost.

As a commercial DC fast charger, the platform is specified for operators who need predictable uptime from a DC fast charging station.

Fleet managers comparing a DC fast charging station against split systems value the single-cabinet service model of this DC fast charger.

The DC fast charging station ships with commissioning support, and every DC fast charger is backed by regional spares.

Choosing a DC fast charger with documented test reports keeps procurement audits simple for any commercial EV charger project.