We will review the different types de configurations that are available to you.
Power and surface of solar panels.
A solar array is a group of solar panels that work together to power your home. The average size of a standard residential solar panel is 1.7m by 1m.
And standard panel can render a power of 375 Wp.
Following the characteristics of this type of panel, you just need to perform the following calculation:
Desired power divided by power of a panel. Either for an installation of 3,000 watt peaks
3000/375 = 8 panels i.e. a necessary surface of approximately 16 m2 for this type of installation
If you decide to buy panels with a lower yield, you will therefore need more surface area for the installation to obtain the same power.
|
Power of solar panels |
Number of panels |
Power produced day |
Estimated savings |
|
3kW |
8 |
13kw/day |
around 350 € per year |
|
4kW |
12 |
18kw/day |
around 650 € per year |
|
5kW |
14 |
22kw/day |
around 1450 € per year |
|
6kW |
16 |
26kw/day |
around 1900 € per year |
|
9 Kw |
24 |
40kw/day |
around €350 per invoice |
How many kilowatt hours does a solar panel produce?
As the efficiency of solar panels increases, you may be wondering how much power they can produce. On average, a solar panel can produce between 270 kWh and 420 kWh per year.
3 Efficiency factors of solar panels
Pmany factors affect performance of a solar panel and therefore the size of an installation, including the angle of the sun, the amount of shade and the location.
The angle of the sun changes throughout the year, so the amount of energy produced by a solar panel also fluctuates. In general, however, you can expect most panels to produce between 270 kWh and 420 kWh per year.
The amount of shade a solar panel receives can also affect its output. If there are trees or buildings nearby that cast shadows on the panel, this will reduce the amount of energy produced. Also, if the panel is not placed directly facing the sun, it will also produce less energy.
The location also plays a role in determination of the amount of energy that a solar panel can produce. Solar panels located in the southern regions of France will logically have a higher yield than those located in the northern regions.
To conclude
The size of a solar panel installation is determined by the number of KW you want to produce and by the type of panel.
It is only in perfect knowledge of all the parameters such as the level of sunshine in your region or the surface available on your roof that you can calculate the surface necessary for your installation.