To optimize performance, tilt your panels at an angle that is 10-15 degrees less than your latitude. For example, if you live at a latitude of 40 degrees, set your panels at about 25-30 degrees.
[pdf] How much do solar panels cost per kW system?3kWh One of the smaller domestic options, this type of solar panel costs £5,000 - £6,000 including installation.4kWh This is a very common domestic size, with installation costing £6,000 - £8,000.5kWh Installation for this panel costs £8,000 - £9,000.6kWh The larger domestic panel, with an installation cost ranging between £9,000 and £11,000. .
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