Here are some steps you can follow to estimate the number of solar panels you need:

1. Determine your energy consumption: Analyze your energy bills to get an idea of your average daily energy consumption in kilowatt-hours (kWh). This gives you a basis to determine how much energy you want to generate with solar panels.

2. Calculate the required energy generation: Determine how much energy you want to generate using solar panels. This can be based on your total energy consumption or a portion of it that you want to cover with solar energy. Keep in mind that solar panels do not always operate at full capacity and there are seasonal variations, so you may want to add a safety margin to your calculations.

3. Check the output of solar panels: Consult the specifications of the solar panels you want to install to find out the output per panel. This is usually expressed in Watt-peak (Wp). The output can vary depending on the brand, type, and efficiency of the panels.

4. Calculate the required power: To determine the required power of the solar panels, divide the desired energy generation by the output per panel. For example, if you want your solar panels to generate 5000 kWh annually and your panels have an output of 300 Wp per panel, you would need approximately 17 solar panels (5000 kWh / 0.3 kW = 16.67 panels).

Keep in mind that this calculation is a rough estimate and other factors may come into play, such as the orientation and tilt angle of your roof, any shading issues, and the available space for installing the solar panels. It is recommended to contact a professional solar panel installer to conduct a detailed analysis and get advice tailored to your specific situation.