Photovoltaic roof support weight budget

How much weight does a solar panel add to a roof?

Although they are larger, they are a lot less efficient than other types of solar panel. How much weight do they add to your roof? Solar panels weighing about 40 pounds will add about 2.8 pounds (1.27 kilograms) per square foot, while on flat roofs they add about 5 pounds (2.26 kilograms) per square foot.

Can a roof support solar panels?

Most roofs can support solar panels, but some can’t, for a variety of reasons. Some brands of solar panels can be fairly heavy and an older roof in poor condition may need reinforcing in order to support them.

How much weight does a PV panel add to a roof?

The average residential PV panel measures about 1.65m by 1m. Including mounting equipment will add about 20kg to your roof. For a full 6kW array, you will need about 20 panels, adding about 365kg of dispersed weight. Fortunately, the weight is distributed across your roof, so no one area bears the bulk of this burden.

How much do solar panels weigh?

Most of the solar panels available on the market, consisting of 60 cells per panel, weigh about 40 pounds (18 kilograms). However, some solar panels can weigh up to 50 pounds (22.6 kilograms), but these are usually produced for the commercial sector rather than for households.

Can a home roof withstand a solar panel array?

Fortunately, most home roofs can comfortably withstand the weight of a solar panel array. A typical residential array will weigh well below the average roof’s weight-bearing capacity. Understanding the factors and how they impact your home structure will help you get the right set-up for your solar energy needs.

Can a roof handle a solar system?

In the vast majority of solar installations, let's say 95%, the existing roof can adequately handle the additional weight of the roof-mounted solar system. However, we need to be sure your roof falls within that 95%.