Hi Rich,

Thank you for your query!

While the Wottz Portable charger is weatherproof as per the product specifications: "Weatherproof Confidence - Designed for the elements, our IP67 rating assures robust protection against water and dust.", it is not waterproof, meaning that it is safe to be outside and can resist rain however should not be submerged and should be dried and stored dry after being in the rain, however you absolutely can charge your car while in the rain.