How much tilt should photovoltaic panels have to be to be effective

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 to avoid lightning in wind power generation

Give lightning another target to strike, so it spares the vulnerable section. . Safeguard the parts which are most likely stuck by the lightning using protective attachmentsGive the large current induced by lightning an additional path so it can safely move to the ground. . [pdf]