Solar panel dimensions indicate the length, width, and thickness of the panels, giving you a better indication of how much space they will take up on your roof. Currently, some of the most common solar panel sizes are 350W and 450W solar panels.
As mentioned, residential solar panels tend to offer an output of 250-400 watts each, although more powerful options can be found on the market. For instance, the Jinko Solar Tiger NEO 72HL4 offers a whopping output of 550-575 watts, it the physical panel size is over 2.1m and 1.05m wide.
The number and size of your solar panels depend on the size of your property and energy demands. A 4kW solar system is one of the most popular sizes for domestic solar systems, as it is typically appropriate for homes with 3 to 4 people. So in this case, you’d need something like 10 solar panels installed on your roof, each at a power of 400 kW.
Solar panel size indicates the amount of energy that is produced by your system, while solar panel dimensions indicate the physical size of the solar panel. The average 350W solar panel has the dimensions of 190cm x 100cm x 4cm. On average, domestic solar panels weigh somewhere between 18 and 21kg.
With these dimensions in mind and based on the solar panel system size you require, your solar panels will take up more or less space on your roof. As an estimate, a 3kW solar panel system in the UK will require about 16m2 of roof space. A 4kW system will take up around 20m2, while a 6kW one will need somewhere around 32m2.
In summary, understanding solar panel sizes (dimensions, wattage, and weight) is important for effective energy generation. Moreover, getting the sizing right also matters to ensure you can fit all the panels on your roof required and that it can withstand their weight.