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Roof Area / Panel Layout Calculator

Find out how many panels fit on your roof and what system size you can install.

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Enter your roof dimensions to calculate panel capacity

How Much Roof Area Do You Need for Solar?

As a thumb rule, 1 kW of solar requires about 65–80 sq ft of shadow-free roof space using 400W panels.

Typical System Sizes by Home Type

Pro Tip: Always deduct 20% for gaps between panels, mounting walkways, and water tanks. A flat roof can also use elevated south-facing mounts to maximise output.