In order to protect the cabling, fuses must be installed as close to the battery as possible. For details see Section 5.3.The battery must never be short-circuited. There is serious danger of setting the battery and the cabling on fire. The battery would be destroyed furthermore and acid and gases would be released. WARNING: You must be extremely cautious never to short-circuit the battery. Charging lead-acid batteries produces inflammable hydrogen gas. Unsealed lead-acid batteries have vent holes releasing hydrogen which forms detonating gas with the ambient air. A small spark e.g. of an electrical switch can detonate the explosive gas mixture. For explosion prevention therefore always provide sufficient ventilation. WARNING: Never install the batteries at places with danger of spark formation. Provide sufficient ventilation at all times. The dump loads (power resistors) of the optional charge regulators can become very hot. For fire safety they must not be mounted on inflammable surfaces or close to inflammable materials. WARNING: Never install the power resistors on inflammable surfaces. 2.1.3 Dangers when mounting These instructions also apply for potential disassembling, checks or other work carried out on your wind professional generator. Only use mast and support designs capable safely to withstand the loads of your wind generator. The mast not only has to withstand your wind generator´s weight and mass moment of inertia (e.g. on a sailing yacht) but also the considerable thrust caused by high wind speed. Details see Sections 3.2 and 6.1. Work on the mast or on your wind generator only at a calm and windless day. Do not step under hanging loads and also prevent other persons from staying underneath e.g. a tilted mast. Make sure that during all work your batteries are disconnected from the system. Prevent your wind generator from unintended starting. For this short-circuit the two generator lines (caution: disconnect the battery beforehand !) or tie one of the rotor blades to the mast. WARNING: Never approach the running rotor.

6 WARNING: Cables with insufficiently dimensioned cross sections can heat up extremely and cause electrical fire.