Crucial Factors that Determine the Size and Number of Solar Panels to Install
The world is fast moving towards more sustainable energy sources, and residential homeowners have become the most significant green-energy consumers. In fact, about 21% of all households in Australia have rooftop solar panel systems, making the country the highest consumer globally. If you plan to transition from standard electricity to solar power, you need to determine the size or number of solar panels to install. However, you can only make such a determination after considering certain factors.
Hours of Sun Exposure
How many hours will your solar panels be exposed to direct sunlight during the day? It is arguably the most crucial consideration when deciding the number of solar panels to install in your home. Luckily, establishing the parameter is not too difficult because all you have to do is count the total number of hours the different sides of a roof are exposed to the sun. Solar panel system experts advise homeowners to select the side that receives the most hours of direct sunlight. Therefore, if you live in an area that is sunny most of the day, you need a few panels. The reason is that more extended exposure periods promote the production of more energy per panel. On the other hand, if you live in a cloudy region and exposure lasts a few hours, you need more solar panels to maximise power generation.
The size of a roof is another crucial factor determining the size and number of solar panels to install. For instance, if you have a small roof, you need to install many highly-efficient solar panels covering the entire surface area. It ensures that you can meet your energy needs without incurring high costs. Conversely, roofs with an expansive workable space can do with fewer large and less-efficient solar panels. Although some large solar panels are not efficient at converting the sun's heat into solar energy, the vast amounts of heat trapped ensure sufficient power generation.
Roof gradient plays a vital role in determining how much sunlight hits a solar panel's surface. Notably, solar panels receive less direct sunlight if you install them on a roof with a high pitch. For this reason, you need several solar panels to ensure that the sun hits all panels directly at the same time, even if the exposure time is limited. However, if you have a low gradient roof, you only need a few panels for the same energy needs. It is because the low slant ensures that the sun hits each panel directly for an extended period.
For more information, contact a solar panel system service.