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Let's talk about solar energy? Have you ever wondered how many kWh a 665W solar panel can generate? The answer depends on some factors, and today I'm going to explain it to you.
To find out how many kWh a 665W solar panel generates, we need to consider two factors in addition to the panel's power: the average irradiation of the installation location and system efficiency for solar energy.
Average irradiation varies depending on the region and is essential for calculating energy production. For example, in Belo Horizonte, the average daily irradiation is 5,4 kWh/m². Now, let's understand how these numbers combine to calculate energy generation.
Factors Influencing Solar Power Generation
1. Solar Irradiation: The “power of the Sun” changes depending on location. In the North of Brazil, the irradiation is one, while in the South it is another. In BH, we use an average of 5,4 kWh/m² per day. This value is crucial to determine how many kWh your card will generate.
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2. System Efficiency: No system is 100% efficient. Losses can occur due to dirt, deviation from the ideal inclination angle, cabling losses, among others. An average of 75% efficiency (or 25% losses) is used to ensure a conservative and realistic estimate.
Calculating the power generation of the 665W solar panel
Now, with all the factors defined, the formula for calculating the energy generated monthly is simple:
Energy generated monthly (kWh) = Panel power (W) x Average daily irradiation (kWh/m²) x System efficiency x 30 days / 1000.
Let's get to the numbers:
- Panel power: 665W
- Average daily irradiation in BH: 5,4 kWh/m²
- System efficiency: 75% (or 0,75)
Replacing the values:
Energia gerada = 665×5,4×0,75×30/1000
This results in approximately 80,80 kWh per month.
Difference by location
Solar irradiation makes a huge difference! In São Paulo, where the medium irradiation is 4,64 kWh/m² per day, the same 665W solar panel would generate around 69,4 kWh per month. In Brasília, with an irradiation of 5,45 kWh/m² per day, generation would be approximately 81,55 kWh per month. Did you see how location directly influences energy production?
To find out how many kWh a 665W solar panel generates in your region, follow these steps: find out the average daily irradiation for your location, consider the system's efficiency and use the formula we show. With this, you will have an accurate estimate of solar energy production. So, ready to invest in solar energy and make a difference on the planet?
