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Traditional sealed waterproof enclosures use an o-ring to seal the product but this method is not suitable for operation in extreme environments where the product is subjected to large temperature fluctuations and water as found in engine compartments. In engine compartments the ambient temperature can easily reach 50°C to 60°C. If the engine mounted product is now suddenly cooled as a result of splashed water or wading the product cools down quickly and the internal pressure drops and water is sucked past the o-ring and becomes trapped inside the product. The only way to prevent the water ingress is to provide the unit with a breather made of a porous plastic membrane with hole sizes small enough to prevent water molecules passing through the membrane but large enough to allow air to freely pass through the membrane. The membrane thus equalises the internal and external pressure preventing water being sucked into the enclosure when subjected to cooling when exposed to water.

Do not submerse in water

Do not short load output to ground

Ensure Car, Soar panel and Battery polarity is correct