No. As long as the automotive electronics system is functioning properly, there should be no problem. Typical automotive electronic systems run on the alternator output of approximately 14 to 15 volts. The maximum charge voltage output of the Battery Tender Plus battery charger is in the same range and less than 15 volts. For the majority of the time, the Battery Tender Plus will be operating in float / maintenance mode so the maximum voltage output will be less than 14 volts.