Using our calculators, you can easily calculate for yourself what you need for each system. For solar panels on inclined roofs, use the ClickFit calculator, but for flat roofs use the FlatFix calculator. Using our calculators ensure that you have the right materials for every situation. The calculators are only suitable for professional fitters. If you want to use the calculators but do not have a password, or if you have questions about how to use the calculators, then please don’t hesitate to contact us.