Medium-Voltage Direct-Connect BESS Enclosure

The enclosure is the core of the scope: the cabin structure, support bases pre-set to the equipment layout, incoming routes and earthing, plus integration of climate control, fire, security and monitoring. Yes, you can buy the enclosure only — the bare-shell tier delivers an equipment-ready cabin, with power modules, batteries and MV switchgear supplied by you or procured separately. If you want a cabin that ties into the system on arrival, take the integrated tier, where ETENZ installs the subsystems and runs the factory check.

The difference sits in the electrical arrangement inside. In the direct-connect architecture the power modules are cascaded and tied straight into the medium-voltage bus, so the cabin interior is a live MV environment. Equipment is therefore spaced to larger clearance and creepage distances, insulating support bases are pre-set, earthing and equipotential bonding are built out more completely, and the HV zone carries warning labels plus a door-interlock interface that keeps doors shut while energized. A low-voltage-side storage cabin sits a tier below on each of these points.

No. Power modules, batteries, BMS and MV switchgear are equipment selected by the customer or by the system integrator. ETENZ works from the equipment documentation to provide mounting positions, support bases, routing and interface provisions; on the integrated tier these items can also be procured and fitted within the agreed project scope. Capacity, efficiency and safety performance of that equipment are defined by its supplier.

They follow the equipment layout and transport limits. The floor plan is set first, from the quantity, dimensions and maintenance clearances of the power-module and battery cabinets; cabin length and door scheme are then derived from it — rows of side-wall service doors let every equipment row come in and out face-on, and the end of the cabin keeps a bay for the condensing unit. Transport height and width limits, lifting method and foundation interfaces are confirmed in the same step.

Clearances are laid out from the equipment documentation you provide and from the project voltage class, keeping distance between live parts and the cabin walls and maintenance aisles, with insulating support components on the bases. For earthing, terminal plates sit at the four corners and in the equipment area, an earthing trunk runs through the cabin, and doors, removable panels and wall penetrations are bonded across. Site earth-grid design and earth resistance are set by the project side.

The cabin carries a fire alarm control panel, smoke and heat detection and interlock interfaces; the suppression device and discharge pipe network are installed and piped to the project configuration, with a discharge indicator and audible and visual alarm outside the door. Alarm, discharge and interlock signals can be taken out to station-level fire and monitoring systems. Suppression selection and release strategy follow the project fire design and local rules, and system-level fire review is led by the project side.

The standard approach combines air conditioning with forced ventilation: wall-mounted units and circulation fans handle the equipment area, a dedicated bay at the end of the cabin carries the condensing unit, and intake and exhaust openings use filters and rain louvers. Cooling capacity is selected to the heat load provided by the system party; hot, humid or high-altitude sites can move to a larger configuration or to several redundant sets.

Yes. Enclosure, color scheme, nameplates and interface standards can all follow your brand, and multi-site programs can be consolidated into a standard cabin type and interface library. For a quotation, send: the equipment list with outline dimensions, floor layout or clearance requirements, project voltage class, incoming and outgoing arrangement, installation environment (temperature / altitude / corrosion class), fire and monitoring requirements, and transport and lifting constraints.