Views: 12 Author: Site Editor Publish Time: 2024-12-10 Origin: Site
With continuous advancements in photovoltaic technology, bifacial solar modules are rapidly gaining global popularity due to their higher electricity generation efficiency. According to the latest data from BNEF (Bloomberg New Energy Finance), the global market share of bifacial modules is expected to reach 35% in 2024, an increase of 8 percentage points compared to 2023. In this new era of accelerating bifacial module penetration, optimizing the mounting angle to maximize electricity generation has become an important topic of focus in the industry.
Unlike traditional monofacial modules, bifacial modules can generate power from both the front and rear surfaces, utilizing reflected light. The front surface directly receives solar radiation, while the rear surface primarily collects scattered light reflected from the ground. According to research data from the International Renewable Energy Agency (IRENA), under ideal conditions, bifacial modules can generate 5-30% more power than monofacial modules.
Front Surface Impact: The tilt angle determines the angle at which the module receives direct solar radiation.
Rear Surface Impact: The tilt angle affects the path and intensity of reflected light reaching the rear surface of the module.
Recent research published by the U.S. National Renewable Energy Laboratory (NREL) in early 2024 indicates that the optimal tilt angle for bifacial modules is typically 2-5 degrees higher than that for traditional monofacial modules. This is because a larger tilt angle helps increase the amount of reflected light reaching the rear surface.
Latitude: Directly affects the angle at which sunlight enters.
Climatic Conditions: Areas with frequent rain or snow require consideration of self-cleaning angles.
Topographical Features: The presence of nearby obstructions can affect light exposure.
According to data from the China Photovoltaic Industry Association:
Concrete Surface: Albedo approximately 0.25-0.35
Grassland: Albedo approximately 0.15-0.25
White Gravel: Albedo can reach 0.40-0.50
Snow-covered Ground: Albedo can reach as high as 0.80
A larger tilt angle requires greater row spacing to avoid shading, which involves balancing land use efficiency and electricity generation efficiency. Current industry practices recommend a spacing factor of 1.8-2.2 times the row height for ground-mounted systems.
Based on global data from the first quarter of 2024:
Low-Latitude Areas (0-30°): Recommended tilt angle of 15-25°
Mid-Latitude Areas (30-45°): Recommended tilt angle of 25-35°
High-Latitude Areas (>45°): Recommended tilt angle of 35-45°
Due to roof space limitations, a balance must be struck between power generation efficiency and installation density:
Flat Roofs: Recommended tilt angle of 10-15°
Sloped Roofs: Follow the roof's slope, with a slight adjustment of 5-10° if necessary.
Agrivoltaic systems must also consider crop growth requirements:
General Crops: Recommended tilt angle of 23-28°
Tall Crops: Tilt angle may be increased to 30-35°.
In early 2024, several leading companies launched machine learning-based systems for optimizing mounting angles:
Real-time monitoring of power generation data
Dynamic adjustments based on weather conditions
Predictive maintenance alerts
The use of carbon fiber composite materials in mounting systems enables larger tilt angles:
Weight reduction by 30-40%
Strength increase by 20-25%
Extended lifespan by 5-8 years
Single-axis tracking systems combined with bifacial modules are emerging:
Power generation gains can exceed 35%
Payback period for initial investment shortened to 4-5 years
Maintenance costs are approximately 15% higher than fixed mounting systems
Taking a 100MW ground-mounted power station as an example (based on the latest cost data in 2024):
Traditional Monofacial Modules + Fixed Mounting System: Payback period of 6-7 years
Bifacial Modules + Optimized Fixed Tilt Mounting System: Payback period of 5-6 years
Bifacial Modules + Smart Tracking System: Payback period of 4-5 years
Power Generation Increase: 15-25%
Internal Rate of Return (IRR) Increase: 2-3 percentage points
Levelized Cost of Energy (LCOE) Reduction: 0.05-0.08 RMB/kWh
Strictly adhere to the designed tilt angles
Ensure overall stability of the mounting system
Allow room for angle adjustments
Regularly check for any deviation from the intended tilt angle
Monitor changes in ground reflectivity
Clean the module surface promptly
Widespread adoption of AI-assisted optimization systems
Expanded application of new materials
Increased levels of automation and intelligence
According to the latest report from PVTECH:
Bifacial module market share will exceed 45% by 2025
Smart mounting systems will penetrate 30% of the market
Mounting system costs will decrease by 15-20%
In the era of bifacial modules, optimizing the tilt angle of mounting systems is directly related to the overall profitability of power stations. It is recommended that investors and developers:
Pre-project phase:
Thoroughly assess site conditions
Conduct professional design
Select reliable products
Construction phase:
Ensure strict installation quality control
Implement full-process supervision
Conduct debugging and verification
Operational phase:
Continuously monitor and optimize performance
Perform timely maintenance
Regularly evaluate benefits
With advancements in technology and market maturity, the development of bifacial module-compatible mounting systems will continue to accelerate, bringing new growth drivers to the photovoltaic industry. Choosing the optimal mounting tilt angle will not only improve power generation efficiency but also ensure the long-term stable operation of the entire photovoltaic system.
