1. What is Weight to Power Ratio?

The Weight to Power Ratio (WPR) is a key metric for evaluating solar panel efficiency, calculated by dividing the panel's weight by its power output. Lower ratios indicate more efficient panels that produce more power per unit of weight.

2. How Does the Calculator Work?

The calculator uses the simple formula:

Where:

• \( Weight \) — Solar panel weight in kilograms (kg)
• \( Power \) — Solar panel power output in watts (W)

Explanation: The ratio helps compare different solar panels' efficiency in terms of power production relative to their weight.

3. Importance of WPR for Solar Panels

Details: WPR is crucial for applications where weight is a critical factor, such as rooftop installations, portable solar systems, and aerospace applications. Lower WPR values indicate better power-to-weight efficiency.

4. Using the Calculator

Tips: Enter the solar panel's weight in kilograms and its power output in watts. Both values must be greater than zero for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What is a good WPR for solar panels?
A: Typical values range from 0.05 to 0.15 kg/W, with lower values being better. High-efficiency panels may achieve WPR below 0.05 kg/W.

Q2: How does WPR affect installation?
A: Higher WPR panels require stronger support structures, which may increase installation costs and limit placement options.

Q3: Does WPR affect transportation costs?
A: Yes, higher WPR panels weigh more per watt produced, potentially increasing shipping and handling costs.

Q4: How has WPR improved over time?
A: Technological advances have steadily reduced WPR, with modern panels being significantly lighter per watt than older models.

Q5: Should WPR be the only factor when choosing panels?
A: No, consider other factors like efficiency, durability, cost per watt, and space requirements alongside WPR.