BWG Photovoltaic Grid-Connected Cabinet
The BWG photovoltaic grid-connected cabinet is manufactured by LYE Technology for solar systems and grid-tied PV installations, in two tiers covering 200–400 kW and 400–1000 kW inverter capacity. Inverters, protection, metering and monitoring mount on a detachable plate inside a spray-coated cold-rolled steel enclosure with base ventilation.
- Capacity tier 1: BWG 200-400 kW, 800 x 2200 x 800 mm
- Capacity tier 2: BWG 400-1000 kW, 1000 x 2200 x 1000 mm
- Enclosure: Spray-coated cold-rolled steel, stiffened door panel
- Ventilation: Multi-hole openings in the lower cabinet section
- Internal mounting: Detachable mounting plate for inverter and protection
Photovoltaic Grid-Connected Cabinet: Key Features & Typical Use
Two Capacity Tiers for Distributed and Utility PV
The series is split into a 200–400 kW tier in an 800 x 2200 x 800 mm enclosure and a 400–1000 kW tier in a 1000 x 2200 x 1000 mm enclosure. A commercial rooftop array and a utility-scale block can therefore be served by the same cabinet family, which simplifies spares and documentation for an owner with several sites.Detachable Mounting Plate for Servicing
Inverters, AC and DC protection, metering and monitoring equipment mount on a detachable plate rather than directly into the shell. That means the assembly can be prepared and wired on a bench, installed as a unit, and removed later for service without dismantling the enclosure or working at height for longer than necessary.Thermal Management for Inverter Loads
Inverter losses concentrate heat in a small volume, so the cabinet uses multi-hole ventilation at the base and a stiffened door panel to keep internal temperatures down for long service in daylight hours. The reinforced door with stiffening bars resists distortion, which protects both the sealing and the flat mounting surfaces inside.Outdoor-Ready Coating and Hardware
The spray-coated cold-rolled steel shell resists corrosion and rust for exposed installations, and quality lock cylinders and high-strength hinges provide reliable closure on a cabinet that is often installed on a roof or in a fenced compound. The cabinet is suitable for indoor and outdoor deployment across residential and commercial PV projects.Photovoltaic Grid-Connected Cabinet Specifications & Technical Data
| Parameter | Details |
|---|---|
| Product | BWG photovoltaic grid-connected cabinet |
| Capacity tier 1 | BWG 200-400 kW |
| Tier 1 dimensions | 800 x 2200 x 800 mm (W x H x D) |
| Capacity tier 2 | BWG 400-1000 kW |
| Tier 2 dimensions | 1000 x 2200 x 1000 mm (W x H x D) |
| Enclosure material | Spray-coated cold-rolled steel plate |
| Ventilation | Multi-hole openings in the lower cabinet section |
| Door construction | Reinforced panel with stiffening bars |
| Internal mounting | Detachable mounting plate for electrical components |
| Lock and hinges | High-quality lock cylinders, high-strength hinges |
| Installation environment | Indoor and outdoor photovoltaic stations |
| Customisation | Hole drilling, logo printing, specified component brands |
| Application | Distributed generation, commercial rooftop and utility-scale PV |
BWG — Grid-Connected Cabinet for Photovoltaic Plants
A grid-connected cabinet sits between the inverter and the transformer, and it has to survive a roof or a compound where nobody visits it for weeks. The BWG is built for that duty in two capacity tiers — 200 to 400 kW and 400 to 1000 kW — with enclosure dimensions of 800 x 2200 x 800 mm and 1000 x 2200 x 1000 mm respectively.This cabinet is also called a PV grid-tie cabinet, a solar combiner and inverter enclosure, or an AC grid-connection cabinet, and it is compared with outdoor combiner boxes and with complete containerised solutions. Because inverter losses concentrate heat in a small volume, the questions worth asking a manufacturer are how the cabinet is ventilated, how the mounting plate is arranged, and whether the enclosure is rated for the position it will occupy.The body is spray-coated cold-rolled steel with multi-hole ventilation at the base, so inverter losses leave the enclosure through a natural convection path rather than through fans. The door panel carries stiffening bars to prevent distortion, and the internal mounting plate is detachable, which lets the electrical assembly be prepared and wired on a bench before it goes into the shell.The BWG is used in residential, commercial and utility-scale grid-tied PV projects, both indoors and outdoors. Because it is a fabricated enclosure platform, it accepts project-specific knockouts, printed identification and complete-set assembly with the component brands specified by the EPC contractor.Factory-Direct Photovoltaic Grid-Connected Cabinet Manufacturer & OEM / ODM
We Manufacture, You Brand
LYE Technology (Zhejiang) Co., Ltd. is a national high-tech enterprise and manufacturer in Wenzhou, China: sheet-metal fabrication, welding, powder coating, busbar machining and final assembly run on our own factory lines, and every unit is function-tested before it leaves the works. A BWG Photovoltaic Grid-Connected Cabinet that reaches your site carries the routine test behind it, not just the rating on the nameplate.We are one of the Top 10 Brands of China's small power distribution boxes and a drafter of national standards in this category, and we hold ISO9001, ISO14001, ISO45001, CCC, CE and TUV certification. Because we are the manufacturer rather than a trading company, our sales engineers quote from your drawing in factory-direct terms, and OEM or ODM work is produced on the same lines as our standard products.For the BWG we fabricate and coat the enclosure in-house, so a project-specific mounting plate drilled for your inverter model is a drawing change rather than a new product.- OEM branding — custom colours, laser marking and your own project or retail packaging, applied at the factory.
- ODM options — ratings, configurations and internal layouts built around your drawings or single-line diagram.
- Certification — ISO9001, ISO14001, ISO45001, CCC, CE and TUV, with test documents supplied per project.
- MOQ — flexible quantities for a project or a trial order, with mixed types welcome in one shipment.
BWG grid-connected cabinet for a 400-1000 kW PV block
Detachable mounting plate prepared for inverter and protection
Photovoltaic Grid-Connected Cabinet Buying Guide from the Manufacturer
PV cabinets are specified against the array layout and the inverter choice. These are the points we confirm before the enclosure drawing is issued.
- Confirm the total inverter capacity so the correct tier, 200–400 kW or 400–1000 kW, is selected.
- Confirm the inverter models and the protection, metering and monitoring equipment to be mounted.
- Confirm whether the cabinet is installed indoors or outdoors and the ambient temperature it will see.
- Confirm the cable entry direction for the DC input, AC output and communications cabling.
- Send the array single-line diagram, inverter datasheets and site conditions.
- Approve the drawing, then production, inspection and dispatch with test documentation.
Manufacturer & Sales Support for Wholesale Buyers
OEM / ODM
Learn more →Factory colours · Logo marking · Custom layout
Wholesale
Learn more →Factory pricing · Flexible MOQ · Global shipping
Distributor Support
Learn more →Account manager · Drawing support · Priority lead times
Needing a Grid-Connected Cabinet for a PV Project?
OEM/ODM, wholesale pricing and distributor support straight from the manufacturer — one enquiry gets you a factory-direct quotation for the BWG Photovoltaic Grid-Connected Cabinet, sized to your array single-line diagram, inverter models and the site conditions at the installation point, with type-test documentation under IEC 60439-1 and the relevant PV grid-connection requirements for your market. Our sales team replies with a specification and an indicative price, so send your drawings and quantity.Contact Our Sales TeamPhotovoltaic Grid-Connected Cabinet — Frequently Asked Questions
What is a photovoltaic grid-connected cabinet?
It is the enclosure that sits between the inverter output and the grid connection in a solar installation, housing the inverter, AC and DC protection, metering and monitoring equipment. The BWG is built in two tiers covering 200–400 kW in an 800 x 2200 x 800 mm enclosure and 400–1000 kW in a 1000 x 2200 x 1000 mm enclosure.What is a PV grid-connected cabinet used for?
It is used in residential, commercial and utility-scale grid-tied photovoltaic projects, both indoors and outdoors, to connect a solar array safely to the grid. It protects the inverter and cabling, provides the isolation and metering the grid operator requires, and gives the O&M team one accessible point for maintenance and monitoring.What is the difference between a PV combiner box and a grid-connected cabinet?
A combiner box gathers the DC strings from the array before the inverter and operates at array voltage. A grid-connected cabinet sits on the AC side or houses the inverter itself and handles grid protection, metering and isolation. Larger installations use both, and the cabinet is the part that has to satisfy the grid connection requirements.Who manufactures photovoltaic grid-connected cabinets?
Solar projects usually buy enclosures from either dedicated PV equipment suppliers or electrical enclosure manufacturers, and the difference often shows up in how the cabinet handles inverter heat. Ask whether the enclosure, coating and detachable mounting plate are produced by the supplier, how the cabinet is ventilated, and whether the plate can be drilled for your specific inverter model. LYE manufactures the BWG in Wenzhou and holds ISO9001, ISO14001, ISO45001, CCC, CE and TUV certification.How much does a PV grid-connected cabinet cost?
Indicative factory-direct pricing is roughly US$300 to US$3,000 per cabinet, depending on the capacity tier, the inverter model, the protection and monitoring equipment fitted and the quantity ordered. Because the cabinet is matched to a specific inverter and array layout, sending the array single-line diagram and the inverter datasheet is what allows an indicative band to be replaced with a firm factory-direct figure.
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Use a distribution box for final circuits and compact branch protection; use a cabinet when the project needs larger incoming capacity, more feeder groups, metering, busbars or greater internal separation. The final choice should be checked against the single-line diagram, device list, available installation space and local project rules.
Provide the device schedule, circuit quantity, component dimensions, cable-entry direction, mounting method and required spare capacity. LYE also reviews door clearance, bending radius, heat-producing devices and the usable depth behind the mounting plate before confirming an enclosure size.
Start with the actual exposure to dust, rain, cleaning water and accidental contact rather than choosing the highest number by default. Cable entries, ventilation, door seals and installation workmanship affect the finished assembly, so the target rating and verification basis must be confirmed for the specific product and project.
Coated or galvanized steel is commonly considered for general indoor service, stainless steel for humid or corrosive locations, and engineering plastic for lightweight non-metallic applications. Material grade, thickness, UV exposure, chemical contact and earthing requirements must be confirmed against the installation environment.
Share the component heat load, ambient temperature, solar exposure, duty cycle and allowable internal temperature. LYE can then review enclosure volume, spacing, ventilation or fan provisions, sun shields, heaters or drainage details; the final thermal design remains tied to the installed equipment and site conditions.
Yes. A dimensioned drawing is preferred, but a physical sample and clear reference photographs can also start the review. Material, thickness, openings, hardware, finish, labels, inspection points and packing are recorded before sampling or repeat production.
PDF and common 2D CAD drawings are suitable for most enclosure enquiries, while 3D files can help with complex assemblies. Include a revision number, units, tolerances and component references; file compatibility and any missing production information will be confirmed during review.
A sample or first article can be arranged for a new or customized product. The approval plan should identify dimensions, openings, fit, appearance, hardware, labels and packaging, together with the sample cost and timing agreed for the actual order.
Available documents may include approved drawings, packing lists, dimensional or appearance inspection records, product data and certificates applicable to the confirmed model. Destination-specific declarations or third-party testing must be requested before order placement so availability and scope can be verified.
Lead time is confirmed after the product scope, quantity, sample requirement and finish are known. Packing is reviewed against product weight, surface protection, destination and shipping method; if an issue is found after delivery, send the order reference, label, photographs and quantity affected so it can be traced and reviewed.
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