The most common reason that your Neocharge Smart Splitter has turned off (breaker tripped) during a charging cycle is because charging is set at a rate of more than 24 amps. Charging at rates higher than 24 amps on a 30 amp circuit is against the recommendation of the NEC (National Electrical Code). Our Smart Splitter is equipped with a thermomagnetic breaker to prevent over-current, which prevents such misuse. When it trips, it is protecting your home. Please contact your car dealership for charge rate settings, or contact our Customer Support. If you know or can limit the charge rate to stay below 24 amps, then it will usually resolve the breaker tripping issue.