Can my roof support the weight of solar panels? If you live in an older home and haven’t had anyone look at your roof recently, this is a totally valid question to ask. You might also want to know how much weight the average solar panel system will add to your roof.
Solar panels come in wide-ranging sizes and weights, depending on the brand, but most panels available in consumer markets come in more or less similar dimensions. If you’re ready to install a residential solar system, this article offers insights into the weight of panels and how to know whether your roof can hold up to that weight.
What’s the Size of Solar Panels?
A single photovoltaic panel installed on a residential unit measures about 65 x 39 inches or 5.4 ft. by 3.25 ft. Within each module, there are 60 solar cells. On the other hand, commercial PV modules are relatively larger, with each panel measuring about 78 x 39 inches or 6.5 ft. by 3.25 ft. Being sizable, they contain 72 solar cells per panel.
While the power output of PV panels based on the size is relatively well-understood, the difference in dimensions clearly explains the purpose of each system. It would be best to consider the smaller size for a home system to maximize roof space. The larger ones are perfect for commercial premises with extended roof space and produce sustainable power, reduce utility costs, and improve a business’s overall objective.
Solar-Panel Weight Explained
Understanding the weight of solar panels is critical when shopping for a PV panel system. Determining the weight of the PV modules is the best means of telling whether your roof is sturdy enough to handle the entire weight of the system without hurting your roof warranty.
As aforementioned, solar panels’ weight varies based on the manufacturer. But the average weight of each 60-cell module is about 40 lbs. You can calculate the amount of weight a solar panel system will add to your roof by multiplying the number of panels you need by the weight of each individual panel.
Can Your Home’s Roof Support the Weight of a Photovoltaic Panel System?
Generally, over 90% of existing roofs on residential properties are strong enough to support the added weight of solar panels. Still, it’s essential to ensure that yours falls within the majority.
The best approach to determine your roof’s sturdiness is to hire a third party to come and assess your roof as well as the solar panel system expected to be installed on it. They’ll generate an approval certificate if the roof is robust enough to support the system.
If the engineer determines that your roof cannot offer adequate support for the solar system, they’ll recommend the necessary work that you need to do to strengthen it. It may include performing repairs, reinforcing the beams or rafters, or replacing the roof for solar panels.
Partner with Solar Optimum and Match Your Roof with the Right PV Panel Weight
If you’re thinking of going solar but are uncertain whether your roof will hold up to the weight of the PV system, contact Solar Optimum. We are an award-winning solar company with elite-certified professionals who can help you ensure your roof is in top condition before installation begins.
