There could be several things that are causing your fridge battery to be drained prematurely:
- Fridge Controllers
- Fuel Level Sensors
- Interior Trailer Lighting
- Telematics/Tracking Systems
These are otherwise known as ‘Parasitic Draws’.
If a refrigerated trailer is sat idle for extended periods, these parasitic draws can slowly drain the battery. This could cause the battery to enter deep cycle. Your fridge battery will require a jump start which will reduce its life span over time.
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