How Much Does a Solar Panel Weigh? (And Will Your Roof Cope?)

The short answer: most modern solar panels weigh about 20 to 25kg each. That is roughly a large bag of dog food. Spread across your roof, a typical system adds around 12 to 15kg per square metre once you include rails and fixings, and most roofs take that in their stride.

Let’s do the sums

A 6.6kW system has about 15 panels. At 22kg a panel, that is around 330kg in total. Sounds like a lot until you spread it over 30 square metres of roof, which is about 11kg per square metre. A roof tile, a few centimetres of rain, or the bloke who climbs up to look at the storm damage all put real load on that same roof.

What matters more than the weight

• Roof structure and age. Rafters or trusses in good nick matter more than a number on a datasheet.
• Roof type. Tin, Colorbond and tile are all fine, but tiles need specific hooks and a careful install.
• Wind uplift. In most regions, wind pulling panels up is a bigger design issue than weight pushing down. Fixings and rails need to suit your local wind rating.
• Condition. Rotten timber, rusted sheets and sagging beams are the red flags, not the panels.

A reputable installer will look at all of this before quoting. If they never go in the roof space or ask about your roof’s age, that is worth a question.

Why do people ask?

Usually because of an older house, a tile roof, or an uneasy feeling after seeing a panel up close. It is a sensible question. Panels are bigger than you expect, glass is heavy, and nobody wants to find out the hard way.

A quick safety note

Moving panels is a two-person job, and getting them onto a roof is a ladder-and-gear job for trained installers. This is not a weekend project, and it is not a “mate with a ute” project. Licensed installers are there for a reason.

Does it vary by state?

The weight does not. The wind loads do. Northern Queensland and northern WA need cyclone-rated mounting, while exposed spots in NSW and Tasmania have their own wind considerations. Local building rules apply, and your installer should design to them.

Where to next?

If you are checking whether your roof has enough space rather than strength, read How Many Solar Panels Can You Fit on Your Roof?. And if you’d rather have someone look at the roof properly, a free Energy Assessment covers it.

General information only, current at November 2026. Prices, rebates and tariffs change, so check current terms before you buy.