High-Quality China Fiberglass Photovoltaic Grid-connected Boxes by Leading Suppliers and Factory
Core role
1. Power confluence and transmission center
The DC power output by the centralized photovoltaic array is converted into AC power through the built-in inverter and then connected to the power grid or supplied to the load, achieving a stable connection between the photovoltaic power generation system and the power grid.
2. Multiple electrical safety protections
SMC material (glass fiber reinforced unsaturated polyester resin) provides high insulation resistance (≥20MΩ) and flame retardancy (UL94 V0 level) to isolate arc/short circuit risks. Built-in lightning protection and overcurrent devices guard against grid fluctuations.
3. Environmental adaptability protection
Features IP65 protection level and above. The dustproof and waterproof sealing structure resists heavy rain and sandstorms. It resists acid/alkali corrosion and UV aging, operating stably from -40℃ to +120℃ in harsh outdoor settings.
4. Operation and monitoring support
Integrated data acquisition module monitors power generation, voltage, current and other critical parameters in real time, supporting remote fault diagnosis and reducing maintenance costs.
Core application areas
1. Large photovoltaic power station
Installed on the inverter output side of centralized ground power stations as a regional grid-connected node, configured with high-capacity electrical components and efficient dust-proof/heat-dissipating systems.
2. Distributed photovoltaic system
Ideal for industrial/commercial rooftops (corrosion-resistant for gas exhaust, explosion-proof for chemical sites) and agricultural-photovoltaic complementary projects (moisture- and heat-resistant for irrigation vapor).
3. Coastal and humid areas
Perfect for offshore platforms and island microgrids. Advanced anti-salt spray corrosion performance ensures reliable, long-term operation in highly humid and high-salt air environments.
4. Special climate areas
Designed for desert and plateau power stations. The anti-sand sealing and wide temperature adaptability (from -40℃ extreme cold up to +70℃ high temperatures) ensure ultimate equipment reliability.
Technical advantages
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SMC material is lightweight, reduces bracket load and simplifies high-altitude installation
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Fully sealed structure prevents moisture intrusion and avoids internal condensation
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Lifespan ＞30 years. Full life cycle cost is lower than metal box
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Modular design supports rapid expansion and component replacement
TY-SXD2-GF1 Model, configuration and installation dimensions
| TY | SX | D2 | GF1 |
| Company Code | SMC non-metallic metering box | Single-phase multi-meter meter box | Photovoltaic grid-connected box |
| Configuration | Name | Component Model | Quantity |
| Incoming switch | Disconnector | CDGK 2P 100A | 1 |
| Outlet switch | Miniature circuit breakers | CDBKs C type 2P 63A dedicated to power grid | 2 |
TY-SXS2-GF1 Model, configuration and installation dimensions
| TY | SX | S2 | GF1 |
| Company Code | SMC non-metallic metering box | Three-phase multi-meter meter box | Photovoltaic grid-connected box |
| Configuration | Name | Component Model | Quantity |
| Incoming switch | Disconnector | HK1N-100/4F | 2 |
| breaker | Small recloser | CDBNE-100GQF 4P C type 63A | 1 |
| breaker | Miniature circuit breakers | CDBK C type 4P 32A | 2 |
| surge | Surge protector | CDYN-Ⅱ40kA 4P 385V | 1 |
Frequently Asked Questions
What are the main functions of these photovoltaic grid-connected boxes?
They serve as a power confluence and transmission center, converting DC power from PV arrays into AC power via built-in inverters, while providing multiple electrical safety protections, environmental shielding, and real-time operation monitoring.
Why is SMC material preferred over traditional metal for the box enclosure?
SMC (glass fiber reinforced unsaturated polyester resin) offers high insulation resistance (≥20MΩ), excellent flame retardancy (UL94 V0), corrosion resistance, and UV aging protection. It is lightweight, reduces bracket load, and offers a life cycle of over 30 years, which is more cost-effective than metal.
What is the difference between the TY-SXD2-GF1 and TY-SXS2-GF1 models?
The TY-SXD2-GF1 is designed for single-phase multi-meter systems and features a CDGK 2P 100A disconnector and CDBKs 2P 63A circuit breakers. The TY-SXS2-GF1 is designed for three-phase multi-meter systems and includes a surge protector, small recloser, and 4P circuit breakers.
Can these grid-connected boxes operate under extreme weather conditions?
Yes. With an IP65 protection rating, these boxes feature a dustproof and waterproof sealing structure that operates reliably in extreme temperatures ranging from -40℃ to +120℃ (and up to +70℃ ambient), making them ideal for deserts, plateaus, and coastal environments.
What safety mechanisms are built in to prevent electrical hazards?
The boxes are equipped with high-insulation SMC enclosures to isolate arc and short circuit risks, built-in lightning protection modules (such as the CDYN-II surge protector), and overcurrent protection devices to handle grid fluctuations.