Why Are 590W Double-Glass Solar Panels So Popular?

590W double-glass solar panels are a typical representative of current high-efficiency PV modules, and are basically hard to find in the market. 590W double-glass solar panels combine the two core advantages of "double-glass packaging" and "high power", and perform outstandingly in various PV scenarios. The following is a detailed introduction from its core features, application scenarios, advantages and precautions:

The performance and structural characteristics of 590W double-glass solar panels are the basis for its adaptation to multiple scenarios:

Double-glass packaging structure: "front ultra-white tempered glass + back tempered glass" is used to replace the traditional "glass + backboard" structure, without organic backboard (to avoid aging), the edges are sealed with sealant, and have strong weather resistance (corrosion resistance, water vapor penetration resistance), impact resistance (can withstand hail, wind pressure) and UV resistance.

High power and high efficiency: The power reaches 590W, usually based on 182mm or 210mm large-size silicon wafers, and is matched with high-efficiency cell technologies such as PERC, TOPCon or HJT. The conversion efficiency can reach 21%-23%, and the power generation per unit area is 10%-15% higher than that of conventional components.

Bifacial power generation capacity: The back glass can absorb the reflected light from the ground/environment (such as ground gravel, water surface, roof reflective materials, etc.), and the bifacial power generation gain is usually 5%-25% (depending on the reflection conditions, the water surface/snow reflection gain is the highest).

Long life and high reliability: There is no risk of backplane aging, the attenuation rate is lower (attenuation ≤2% in the first year, attenuation ≤0.3% in subsequent years), the design life can reach 30 years (traditional components are mostly 25 years), and the long-term power generation stability is stronger.

1. Large-scale ground PV power stations (most mainstream scenario)

Large-scale ground power stations are highly sensitive to "cost per kilowatt-hour" and "power generation", and the advantages of 590W double-glass modules are significant:

Cost reduction and efficiency improvement: High-power modules can reduce BOS (balance of system) costs such as brackets, cables, and inverters (reducing the number of modules by about 5%-8% per MW), and reduce installation labor costs;

Bifacial gain: When gravel/sand is laid on the ground, the back can absorb 30%-50% of reflected light, and the annual power generation is 8%-15% higher than that of single-sided modules; if paired with white ground film, the gain can be increased to 15%-20%;

Weather-resistant adaptation: In outdoor environments (high temperature, high humidity, and dust), the corrosion and aging resistance of double glass can reduce operation and maintenance costs (such as avoiding module replacement due to backplane damage).

2. Industrial and commercial distributed PVs (factory/warehouse roofs)

Industrial and commercial roofs (such as steel structure factories and concrete warehouses) are large in area and have high power loads, and need to take into account both "power generation per unit area" and "long-term stability":

High power adaptability to roof space: The power density per unit area of 590W modules reaches 300-350W/㎡, which is more suitable for limited roof space than conventional modules (250-280W/㎡), maximizing the use of area;

Anti-environmental interference: There may be acid and alkali mist and dust in industrial environments (such as chemical and metallurgical plants). The glass material of double glass can resist corrosion and avoid power attenuation caused by corrosion of traditional back panels;

Income stability: The industrial and commercial electricity price is relatively high (especially in peak periods). The long life (30 years) and low attenuation of double glass can guarantee more than 25 years of stable income, matching the long-term electricity demand of enterprises.

3. "PV +" composite projects (agricultural PV, fishery PV, forest PV complementarity)

"PV + agriculture/fishery" and other scenarios have strict requirements on the "weather resistance" and "bifacial gain" of the components. Double-glass components are the best choice:

Agricultural PV complementarity: The components are installed above the farmland (2-3 meters in height) and need to withstand the corrosion of pesticides and fertilizers and humid environments. The double-glass's ability to resist water vapor penetration can avoid internal short circuits, and the back can absorb crop/soil reflected light, with a gain of 5%-10%;

Fish PV complementarity: The components float or are installed above the fish pond. In a high humidity + water vapor environment, the traditional backplane is susceptible to moisture and aging, while the double-glass sealing structure can completely resist water vapor, and the water surface reflects strong light (gain 15%-25%), significantly increasing power generation;

Forest PV complementarity: The shade of the trees in the forest will block the front light, and the back power generation of the double-glass can use the scattered light in the forest to reduce the loss of shading.

In scenes such as building curtain walls and ceilings, double-glass modules have both "power generation function" and "building material properties":

Appearance and durability: Double-glass modules can customize glass colors (such as transparent and brown), with a neat appearance and adaptability to building design; the glass material matches the building life (50 years) and does not need to be replaced frequently;

Safety and function: When used as curtain walls/ceilings, double-glass has better impact resistance (resistant to typhoons and hail) and fire resistance (Grade A) than traditional building materials, and uses reflected light from the building surface (such as white walls) to achieve double-sided power generation.

5. Special environmental scenarios (high altitude, coastal, rainy areas)

High altitude areas: strong ultraviolet rays and large temperature difference between day and night. The ultraviolet resistance and thermal expansion and contraction resistance of double glass (glass thermal stability is better than backplane) can reduce aging;

Coastal areas: high salt fog environment is easy to corrode metals and organic materials. The glass + sealant structure of double glass can resist salt fog erosion and avoid oxidation of component frames/internal circuits;

Rainy and foggy areas: In humid environments, the water vapor penetration resistance of double glass can prevent power attenuation caused by internal condensation, and reflected light on rainy days can improve back power generation.

Economical efficiency: high power reduces BOS cost, double-sided power generation increases power generation, and the cost per kilowatt-hour is 8%-12% lower than that of conventional components;

Reliability: 30-year life + low attenuation, reducing operation and maintenance costs, and more stable long-term benefits;

Scenario adaptability: weather resistance + double-sided power generation, covering almost all PV scenarios such as ground, roof, PV +, special environment, etc.

Installation load-bearing capacity: The weight of double-glass modules is about 30-35kg (traditional modules are 20-25kg), and the support/roof load-bearing capacity must be ensured to meet the standard;

Back shielding: Avoid shielding the back of the module by the support, vegetation, etc., otherwise the double-sided gain will be reduced;

Grounding and wind resistance: The glass surface is prone to dust accumulation, and a reasonable inclination angle needs to be designed (for self-cleaning); coastal/high-wind areas need to strengthen the support fixation to prevent the module from falling off.

In summary, the 590W double-glass solar panel has become the mainstream choice for current PV projects with its combination of "high power + double glass + long life", especially in scenarios with high requirements for efficiency, weather resistance and long-term benefits, and its advantages are irreplaceable.