First, welcome to the forum.
Second, many experts testify that ultrasonic mouse deterrents don't work.
Third, try removing items from the circuit, one at a time until you find the one that is causing the short circuit, or the overload.
2006 Damon Daybreak 3276 35'with 5 Star Tuner. 3 200 Amp Lithium batteries and 2000 watt PSW inverter/charger. 2013 Elantra on a Master Tow dolly.