Mini rail is also called short rail. It is a kind of solar mounting bracket for metal roof solar mounting structures. It is a so popular bracket to be used in solar mounting systems on tilt tin rooftop. It is widely used in both commercial and residential on grid or off grid solar energy system.

There are mainly two types of mini rails in photovoltaic mounting brackets market. One is narrow version mini rail and the other is wide version mini rail.

The width of narrow version short rail is about 30 mm, length varies from 120 mm to 250 mm . The holes for putting self drilling screws through are in the middle line of this kind of rail .

The width of wide version mini rail is about 57 mm. Length is different from 300 to 400 mm. The holes are allocated in two edges of the ends of mini rail . And the number of holes are usually about 10 pieces.

How to choose the right mini rail for your metal roof solar mounting system ? It depends on the shape of the metal roof sheets. If the metal roof sheet is trapezoidal shape, then we can choose narrow version mini rail as there is a long small flat on the ridge of the sheet. This kind of mini rail can be fixed on the flat ridge of metal sheet by driving self drilling screws through the holes into the roof . EPDM pads should be under the holes in order to protect roof from water in. If use this kind of mini rails, horizontal installation is the only choice.

If the shape of roof is trapezoidal or wave shape, we can use wide version mini rail. We put mini rail spanning the ridges of metal sheet and use st6.3&25 mm self drilling screws to fix it . The EPDM should be stuck under the holes to prevent from water infiltration. If you use wide version short rail, then the panel installation direction should be vertical only.

When discussing ground-mounted photovoltaic (PV) projects, many people first think of ground screw foundations or concrete foundation as the installation base.

However, many overlook a more economical and convenient foundation solution: gabion .

Gabion (also known as stone cage) ground-mounted PV systems use metal mesh cages filled with stones as a counterweight foundation to fix the PV supports to the ground.
This method has significant advantages in projects with special geological conditions and high environmental requirements:
1. No excavation or foundation damage required & Preserves existing terrain: Unlike traditional cast-in-place concrete pile or helical pile foundations, gabion mesh counterweights do not require large-scale excavation or damage to the soil structure, making them ideal for landfills, brownfields (contaminated land), or ecological reserves.
2. High adaptability: Can be deployed directly in rocky areas, hard ground, or areas where drilling is impossible.
3.Convenient and flexible construction & Rapid installation: Gabion mesh can be prefabricated or filled on-site, reducing the waiting time required for concrete curing and significantly shortening the construction period.
4. Mobility: If the power station needs to be relocated or the land lease expires, the gabion foundation is easy to dismantle, generating almost no construction waste.
5. Excellent Drainage and Ventilation & Performance: Prevention of Water Accumulation: The gaps between the stones have excellent permeability, unlike concrete foundations which impede rainwater penetration, effectively reducing site drainage pressure.
6. Natural Cooling: Good air circulation helps dissipate heat from the bottom of the modules, theoretically improving the power generation efficiency of photovoltaic modules in high-temperature environments.
7. Economic and Environmental Costs: Local Material Sources: If waste rock or gravel resources are available at or near the project site, material transportation costs can be significantly reduced.
8. Low Carbon Footprint: Using natural stone as ballast is more environmentally friendly than concrete, which emits large amounts of carbon dioxide during production.
9. High Stability and Durability: Wind and Slip Resistance: The large volume and weight of the gabion baskets provide excellent wind uplift resistance.
10. Structural Flexibility: Compared to rigid concrete foundations, it better adapts to minor foundation settlement or surface deformation and is less prone to cracking.

Due to the high salt spray corrosion, strong wind loads, and high humidity of coastal environments, the requirements for solar mounting system differ significantly from those in inland areas. Therefore, the following aspects should be considered when selecting solar mounting:

1. Choosing the Suitable Material:

* Stainless Steel (e.g., 304, 316): Extremely corrosion resistant, especially 316 stainless steel, suitable for the high-salt environment of the seaside, but extremely expensive.

* Aluminum: Lightweight, corrosion resistant (with a natural oxide film protection), and easy to install. Its strength is relatively lower than steel, suitable for rooftop projects in coastal areas; ground-mounted designs need to be reinforced to withstand wind loads.

* Hot-dip Galvanized Steel: Common solution and moderately priced, the hot-dip galvanized layer provides corrosion protection for a certain period. For coastal areas, a thickness of ≥85 μm of the hot-dip galvanized is recommended.

* ZAM Coated Steel: Affordable price; compared to hot-dip galvanized steel, ZAM steel offers 2-3 times longer salt spray resistance, making it particularly suitable for the high humidity and high salt environment of the seaside.

2. Choose a suitable structural design solution

* Fixed solar ground solutions: The design should focus on multiple diagonal braces, large columns, and strong nodes. In typhoon areas, the supports should be designed according to wind pressure, and reinforcement rods or thicker profiles should be added if necessary.

* Roof solar supports: Considering the limited load-bearing capacity of the roof, especially old or lightweight roofs (such as tin roofs with corrugated steel sheets), the solar mounting solution primarily use aluminum structure and should pay attention to structural safety.

* Tracking solar solutions: PV tracking systems have poor wind resistance, posing a high risk when used in high-wind-speed coastal areas, and incurring high costs and maintenance expenses.

3. Pay attention to construction and maintenance.

*Construction requirements: Welded parts should be properly treated for corrosion protection. Bolts are best made of stainless steel or galvanized with anti-loosening measures.

*Regular maintenance: In coastal areas, it is recommended to check the bolts and anti-corrosion coating of the supports every 6-12 months and promptly treat any rust or peeling.

The key to choosing solar mounting systems in coastal areas is: corrosion-resistant materials + wind-resistant structure + regular maintenance. CORIGY is a professional solar mounting solution provider, offering the most cost-effective coastal solar support design solutions tailored to the environment. Products include solar ground-fixed structures, roof solar solutions, carport solar mounts, and other solar mounting products, with extensive experience in coastal PV support projects.

The application field of flat roof photovoltaic support system is wide, covering multiple fields such as residential buildings, commercial buildings, industrial plants, etc. Among them, residential buildings have become the main source of demand for flat roof photovoltaic support systems due to their huge market demand and vast market space, accounting for about 40% of the market share.

Faced with numerous photovoltaic bracket solutions, the following are three aspects that need to be paid attention:

1. Avoid flat placement of solar panels: Installing modules in a flat manner can easily accumulate dust, resulting in loss of power generation, inconvenient cleaning, and difficulty in removing accumulated water. It is also difficult to remove dust through natural rainfall. It is recommended to make a certain inclination angle when laying flat, usually 5-10 degrees, while facing towards the optimal orientation.

2. Consider the issue of obstruction: The power generation efficiency of solar panels is highly dependent on direct sunlight, and if they are obstructed by trees, buildings, etc., it will seriously affect the power generation efficiency. Before installation, shadow obstructions should be eliminated. If the obstruction source cannot be removed, consideration should be given to changing the installation site.

3. Pay attention to roof structure and waterproofing issues: The weight of photovoltaic panels and solar mounting structures may put pressure on old or structurally weak roofs. The long-term load caused by installing PV brackets may lead to fatigue and potential damage to the roof structure. Some solar roof brackets require drilling holes on the roof during installation, which can damage the original waterproof layer and increase the possibility of water leakage. So before installation, it is necessary to evaluate and repair the roof structure and waterproof layer.

For the installation of flat roof solar brackets, commonly used are ballast type and concrete foundation mounting brackets type. CORIGY has more than 15 years of experience in photovoltaic bracket design and production, and can provide various professional design solutions based on the load-bearing capacity of the roof to ensure that the bracket installation is simple, firm, and efficient in generating electricity within safe wind speeds.

With the development of smart power grids, real-time monitoring of power parameters and wireless data transmission have become the core needs of power distribution systems. The CRDM integrated measurement cabinet launched by GAOBO SWITCHGEAR MANUFACTURER is equipped with advanced wireless data transmission technology, realizing intelligent monitoring of power parameters and providing efficient data support for smart power management.

The CRDM measurement cabinet’s wireless data transmission function has three obvious advantages: first, adopting LoRa or 4G wireless communication technology, with strong anti-interference ability and long transmission distance, suitable for large-scale power distribution scenarios such as industrial parks and residential communities; second, real-time transmission of key power parameters (voltage, current, power factor, power consumption) to the central control system, allowing operators to grasp the power operation status remotely; third, supporting data storage and historical query, facilitating power consumption statistics and energy saving analysis.

In addition to wireless data transmission, the CRDM measurement cabinet also has high-precision measurement performance, with a rated current of 32A and rated voltage of AC 200V, meeting the measurement needs of low voltage power distribution systems. The cabinet adopts IP30 protection grade, compact structure, and easy installation. GAOBO SWITCHGEAR MANUFACTURER supports customized wireless communication protocols and measurement parameters according to project needs, adapting to different smart power monitoring systems.

To upgrade your power monitoring system with wireless data transmission, contact GAOBO SWITCHGEAR MANUFACTURER, Factory located in Guangzhou China

Substation backup power is crucial to ensure the stable operation of power grids, and GZDW DC power supply cabinets are the core equipment for substation DC backup systems. GAOBO SWITCHGEAR MANUFACTURER’s GZDW series DC power supply cabinets are designed for high voltage substations, with reasonable parameter configuration and reliable performance, providing uninterrupted DC power for substation control, protection and signal systems.

The key parameters of GZDW DC power supply cabinets directly determine their adaptability to substation scenarios. First, rated voltage: commonly 220V DC or 110V DC, matching the voltage requirements of substation control circuits; second, rated current: ranging from 10A to 200A, according to the total power of the load to be supplied; third, battery capacity: usually 100Ah to 1000Ah, ensuring long-term backup power supply when the main power is cut off; fourth, charging mode: adopting intelligent three-stage charging (constant current, constant voltage, floating charge) to extend battery service life.

GAOBO SWITCHGEAR MANUFACTURER’s GZDW DC power supply cabinets are equipped with intelligent monitoring modules, which can real-time monitor battery voltage, current and charging status, and issue alarms for abnormal conditions. The cabinet adopts IP30 protection grade, suitable for indoor substation environments, with compact structure and easy maintenance. We also provide customized parameter configuration according to different substation scales and load requirements. For substation backup power solutions, choose GAOBO SWITCHGEAR MANUFACTURER, your reliable partner in power distribution. Visit gaoboele.com for more product details.

Humid industrial environments such as food processing plants, textile factories and coastal industrial parks pose great challenges to switchgear operation, as moisture and dust can easily cause internal component corrosion and short circuits. Choosing switchgear with the right IP rating is the key to ensuring stable operation, and IP4X and IP54 are the two most commonly used protection grades in humid industrial scenarios. GAOBO SWITCHGEAR MANUFACTURER will help you distinguish the differences between the two and make the right selection.

IP4X switchgear is protected against solid foreign objects larger than 1mm and has no protection against water splashing. It is suitable for humid environments with little water splashing, such as indoor industrial workshops with good ventilation. IP54 switchgear, on the other hand, is protected against dust (dust cannot enter in harmful quantities) and water splashing from any direction, making it suitable for environments with frequent water splashing or high humidity, such as coastal industrial parks and food processing plants with cleaning operations.

When selecting switchgear for humid industrial environments, in addition to the IP rating, it is also necessary to consider the cabinet material and internal anti-corrosion treatment. GAOBO SWITCHGEAR MANUFACTURER’s IP4X and IP54 switchgear adopt high-quality cold-rolled steel with electrostatic anti-corrosion spraying, and internal components are treated with anti-moisture and anti-corrosion, ensuring long-term stable operation in humid environments. We can also customize switchgear protection grades according to specific environmental conditions. For personalized switchgear solutions for humid industrial environments, contact GAOBO SWITCHGEAR MANUFACTURER via gaoboele.com.