Our Roof Suitability Checker gives you a fast, specific assessment of your roof's orientation, shading, pitch and structure — the same factors our installers evaluate on-site — so you know how much usable solar capacity your roof really has, and on which sections, before you commit to a full quote. Almost every roof in Sydney can technically host some solar; the real question is how much, and at what quality.
Quick answer (TL;DR)
- Assesses orientation, shading, pitch and roof structure/material.
- North-facing sections produce the most; east/west next; south meaningfully less.
- Even partial shading on one panel can disproportionately cut a string's output.
- Flags low-pitch roofs (may need tilt frames) and roof material/age considerations.
- Feeds straight into the Solar & Battery Sizing Calculator and Quote Wizard.
A north-facing roof with no shading might comfortably support a large, highly efficient array. A predominantly west-facing roof with a big gum tree shading the afternoon sun might still be worth doing — but with a smaller array, different panel placement, and a sizing approach that accounts for reduced afternoon output. Our checker gives you that nuance rather than a blunt pass/fail.
Roof orientation is the single biggest factor in solar output. In the southern hemisphere, north-facing sections generally produce the most energy across the day, followed by east and west, with south-facing sections producing meaningfully less. Most Sydney homes have some mix, and the checker identifies how much usable area you have on each aspect.
Shading is assessed using your address, roof photos, or satellite imagery to identify trees, neighbouring buildings, chimneys and other obstructions — since shading patterns from a tree can shift significantly between summer and winter sun angles. Even partial shading on a single panel in a string can disproportionately reduce that string's output, which is why this step matters more than many homeowners expect.
Roof pitch affects both output and installation approach. Very low-pitch or flat roofs usually need tilt-frame mounting to achieve optimal panel angle, while steep pitches can affect accessibility and methodology. The checker flags where your roof sits and what that means practically.
Tile, colorbond/metal deck, and concrete roofs each have different mounting requirements, and older roofs may need a condition check before panels go on top — there's little point installing a 25-year warrantied system on a roof that needs re-roofing in five years. The checker asks about your roof material and approximate age.
Your results summarise which sections of your roof are strong candidates for solar, an estimate of usable roof area and the system size it could realistically support, and any flags worth discussing further — such as significant shading, an unusual pitch, or a roof material needing extra mounting consideration. This isn't a substitute for an in-home or drone-based assessment, but it's a genuinely useful first filter.
The Roof Suitability Checker feeds directly into a more accurate outcome from our Solar & Battery Sizing Calculator and our full Quote Wizard — if you've already run this check, you can skip straight to a system recommendation with roof data already factored in. It's particularly useful for homeowners in tree-lined suburbs across the Blue Mountains, Southern Highlands and parts of the North Shore, where shading is a bigger variable than orientation alone.
Solar suitability tools that only consider postcode-level average irradiance miss the details that actually determine your output — the tree next door, the exact pitch of your roof section, the chimney that shades the north-west corner in winter. Because our team does genuine in-home and drone-based assessments as standard across Sydney and the surrounding 200km region, the Roof Suitability Checker is calibrated against real installations.
Check your roof's solar suitability now — it takes a few minutes and sharpens every quote that follows. Or call 0421 458 217.
