Quick Answer
Short Answer: Dual-axis trackers can provide a significant increase in energy production over time, making them a cost-effective option compared to single-axis trackers, especially in areas with low sun angles or high peak sun hours.
Energy Production Advantages
Dual-axis trackers can follow the sun’s movement in both the azimuth (horizontal) and altitude (vertical) directions, allowing them to capture more sunlight throughout the day. This results in a 20-30% increase in energy production compared to single-axis trackers. For example, a 1 MW solar array with a dual-axis tracker can produce up to 5.1 million kWh per year, while the same array with a single-axis tracker would produce around 4.2 million kWh.
Cost and Complexity Considerations
The higher upfront cost of dual-axis trackers is a significant factor to consider. However, the increased energy production can lead to a shorter payback period, typically between 5-7 years. In contrast, single-axis trackers may not break even until 10-12 years after installation. It’s essential to weigh the initial investment against long-term energy savings and consider factors like terrain, shading, and local building codes that may affect tracker performance.
Return on Investment Analysis
To determine the cost-effectiveness of dual-axis trackers, perform a detailed financial analysis using tools like the Levelized Cost of Electricity (LCOE) or the Net Present Value (NPV) method. These calculations take into account the upfront cost, maintenance expenses, energy production, and system lifespan. By accounting for local solar irradiance, system efficiency, and other site-specific factors, you can make an informed decision about the most suitable tracker type for your off-grid or solar-powered system.
Find more answers
Browse the full Q&A library by topic, or jump back to the topic this question belongs to.